Perry County, MO: No Building Permit, No Zoning

Unincorporated Perry County, Missouri appears not to require a residential building permit; ask the County Commission to confirm the requirements for your parcel before construction^1,2. We could not confirm countywide zoning, setbacks or occupancy rules³. Perryville has adopted building codes inside city limits⁴. Missouri DHSS handles ordinary home septic permitting in Perry County, while DNR handles certain larger or discharging wastewater systems^5,6.

At a glance

Building permit: Appears not required for unincorporated residential construction; confirm with the County Commission¹
Zoning: Unincorporated-county zoning remains unconfirmed; ask the County Commission³
Septic permits: Missouri DHSS for ordinary home systems; DNR for certain other wastewater systems^5,6
Septic soils: Only 4.2% of soils lack severe limits for a conventional drain field⁷
RV or tiny-home living: Not confirmed; ask the County Commission before buying or occupying land³
Owner-builder: No Perry County owner-builder exemption was confirmed⁸
State-highway driveway: A MoDOT entrance permit is required for work in MoDOT right-of-way⁹

Who to call

Also useful

Perry County Commission

Parcel-specific questions when no county building or zoning office is published

(573) 547-4242

15 W Ste Maries St., STE 2, Perryville, MO 63775

Health department

Perry County Health Department

General public health services and the county notice directing septic applicants to Missouri DHSS

573-547-6564

info@perrycountyhealth.com

406 N. Spring, Suite #1, Perryville, MO 63775

2 more officesSeptic permits · Roads & driveways

Septic permits

Missouri Department of Health and Senior Services Onsite Wastewater Treatment Program

Onsite wastewater construction permit applications and general permitting questions

573-751-6095

onsiteprogram@health.mo.gov

PO Box 570, Jefferson City, MO 65102-0570

Roads & driveways

Perry County Road & Bridge Department

County-road maintenance and county-road access questions

(573) 547-6269

4803 N. Hwy. 51, Perryville, MO 63775

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Do you need a building permit in Perry County, Missouri?

Unincorporated Perry County appears not to require a residential building permit, and the state building-code listing shows no adopted county residential code.

Unincorporated Perry County appears not to require a residential building permit, and the state building-code listing shows no adopted county residential code¹. We could not confirm current county building-inspection or certificate-of-occupancy requirements, so ask the County Commission for written parcel-specific confirmation before construction^1,2. No Perry County owner-builder exemption was confirmed⁸. Inside Perryville, the city has adopted building codes; that does not change the state wastewater authority for a home septic system^4,5,6. Missouri’s farm-building exemption applies to county fire-protection and fire-prevention ordinances, not every building, floodplain or septic requirement¹⁰.

Who issues building permits in Perry County, Missouri?

For an unincorporated Perry County parcel, start with the County Commission at (573) 547-4242 to confirm building-permit and inspection requirements; we could not confirm a county building-permit office^1,2. Missouri DHSS handles home septic permitting, and the Perry County Health Department directs septic applicants to the state⁵. Ask Perry County Road & Bridge about access from a county road¹¹. A residential entrance in MoDOT right-of-way needs a separate state entrance permit⁹. Apply online, contact MoDOT’s Traffic Specialist or mail a hard-copy application; depending on the work, MoDOT may require site plans, a bond, liability coverage or a traffic study¹².

Does Perry County, Missouri have zoning?

We could not confirm whether unincorporated Perry County has current countywide zoning; the absence of a planning department from a services listing does not establish that zoning is absent.

We could not confirm whether unincorporated Perry County has current countywide zoning; the absence of a planning department from a services listing does not establish that zoning is absent³. Ask the County Commission about setbacks, minimum lot size, building height, lot coverage, subdivision approval and floodplain requirements before choosing a building site^2,3. Missouri law allows certain counties to adopt zoning for unincorporated territory after voter approval, but that authority does not establish Perry County’s current rules¹³. For a Perryville parcel, ask city staff to verify the current property classification and consult the Municipal Code for district restrictions, as directed by the city’s published zoning map¹⁴. Home septic permitting remains with Missouri DHSS rather than the city planning counter^5,6.

How do septic permits work in Perry County?

Missouri DHSS handles Perry County home septic permits following the health department’s handoff to the state on July 1, 2025.

Missouri DHSS handles Perry County home septic permits following the health department’s handoff to the state on July 1, 2025⁵. DHSS covers single-family residential lagoons and domestic wastewater systems using soil treatment with flows of 3,000 gallons per day or less⁶. DNR handles surface-water discharges, larger soil-treatment systems, industrial wastewater and lagoons serving other uses; DNR must also approve subdivisions, mobile-home parks and campgrounds planned with onsite wastewater systems⁶. Residential property under 3 acres requires a construction permit; larger single-family lots may qualify for an exemption, but wait for the permitting authority to confirm before starting work⁶. Nonresidential onsite systems require a permit regardless of acreage⁶. DHSS application fees for construction, modification and repair are temporarily suspended effective August 28, 2026⁶. Only 4.2% of Perry County soils lack severe limits for conventional drain fields, so make a site evaluation an early purchase contingency⁷.

Can you live in an RV or tiny home in Perry County?

We could not confirm a rule allowing or prohibiting full-time RV or tiny-home occupancy on private land in unincorporated Perry County.

We could not confirm a rule allowing or prohibiting full-time RV or tiny-home occupancy on private land in unincorporated Perry County³. Ask the County Commission about the proposed use, dwelling size, setbacks, floodplain status and occupancy approval before buying for that purpose^2,3. An uncertain zoning answer is not permission to occupy an RV, tiny home, manufactured home or accessory dwelling³. Ask Missouri DHSS how a home’s wastewater must be treated, because small or off-grid dwellings still need compliant sewage disposal^5,15. Wastewater cannot be discharged into a road ditch or onto the ground or threaten public health or the environment¹⁵. For a Perryville parcel, verify the property classification with city staff rather than applying the unincorporated-county answer¹⁴.

How do you build a home in Perry County, step by step?

Confirm the parcel’s jurisdiction: Perryville has adopted city building codes, while the county residential permit answer concerns unincorporated land.

Confirm the parcel’s jurisdiction: Perryville has adopted city building codes, while the county residential permit answer concerns unincorporated land^1,4.

Ask the County Commission for written confirmation of building-permit, inspection, zoning, subdivision and floodplain requirements^1,2,3.

Arrange a soil and site evaluation before committing to a septic layout; only 4.2% of Perry County soils lack severe limits for conventional drain fields⁷.

Obtain a Missouri DHSS home septic permit or confirmed exemption before installation; ask DNR about wastewater projects outside DHSS jurisdiction⁶.

Ask Road & Bridge about county-road access, or apply to MoDOT for an entrance in state right-of-way^9,11.

Before permitted MoDOT work begins, request a Missouri One Call locate, complete the online Notice of Intent, keep approved plans and the permit onsite, and notify the Traffic Specialist at least 48 hours in advance¹².

What should you check before buying land in Perry County?

Make septic feasibility a purchase contingency and ask Missouri DHSS about any local inspection requirement before closing; Missouri has no universal septic inspection requirement for real-estate transfers, but a buyer or lender may request an inspection^7,15. Missouri requires Public Drinking Water Branch approval before constructing or altering a public water-system well, subject to statutory exemptions; that rule does not establish a preconstruction permit requirement for an ordinary private domestic well¹⁶. Ask Missouri DNR which requirements apply to the proposed water supply¹⁶. Verify road access with Road & Bridge or MoDOT and ask the County Commission about floodplain approval^3,9,11. Perry County’s effective property-tax rate is about 0.7%, with a median annual bill of about $1,368⁷. Short-term lodging establishments must collect and remit a 6% county tourism tax and use electronic reporting¹⁷.

Watch-outs

Confirm unincorporated Perry County building permits, inspections and occupancy requirements with the County Commission before construction^1,2.
Countywide zoning, RV and tiny-home occupancy, setbacks and floodplain approval remain unconfirmed; ask the County Commission about the parcel^2,3.
For Perryville land, verify the current property classification with city staff; the city Planning and Zoning Commission recommends zoning changes and special-use permits to the City Council^14,18.
The temporary DHSS septic application-fee suspension does not waive the construction permit or the need to confirm an exemption before work⁶.

Sources

18 official pages, each quoted and re-checked · written October 11, 2026

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Off-grid gear

Going off-grid in Perry County means bringing your own water and power. The kit we’d start with:

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Compared with neighboring counties

Like 4 of its 6 neighbors, Perry County requires no county building permit for a home.

Rule	Perry County	Bollinger County	Ste. Genevieve County	Cape Girardeau County	Madison County	St. Francois County	Iron County
Building permit	Not required	Not required	Required	Not required	Not required	Required	Not required
County zoning	No	No	Not published	No	No	Not published	Not published
Septic permits	DHSS	DHSS	County Health Dept.	County Public Health Center	MO Dept. of Health & Senior Services	County Health Center	DHSS

Answers from the rulebook for Perry County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Perry County rules

Short-term rentalsLimited
Short-term rentals, including Airbnb, VRBO, and similar platforms, operating as lodging establishments in Perry County.
- Perry County requires collection and remittance of a 6% tourism tax.
- Beginning May 1, 2026, required tourism tax reports and payments are submitted electronically through the iWorQ portal.
- Lodging providers must register for an account.
- Reports are monthly and due on the 20th.
- Late payments are subject to a 3% late fee beginning on the first day of the month following the due date and accruing monthly until paid.
tourism tax: 6 percent · reporting frequency: monthly · report due date: 20 day of month · late fee: 3 percent (begins on the first day of the month following the due date and continues monthly until paid)
“Due to Missouri House Bill 199 that was signed into law July 10, 2025, all lodging establishments in Perry County will be required to collect and remit a 6% tourism tax to Perry County.”
Transient Sales Tax ↗Re-checked Sep 23, 2026
Permit feesVariable (with conditions)
Onsite wastewater treatment system construction, modification, and repair permit fees administered by Missouri DHSS for Perry County, including the DHSS authority listed for Perry County.
- Effective August 28, 2026, application fees are temporarily suspended.
- The prior $90 permit fee was removed from RSMo 701.046 and DHSS is authorized to set reasonable fees.
- Current fees remain on hold until new standards take effect.
prior application fee: 90 USD (temporarily suspended effective August 28, 2026)
“Effective August 28, 2026, due to changes to RSMo 701.046, the application fees associated with on-site sewage disposal system construction, modifications, and repairs will be temporarily suspended. 701.046 was changed to take out the $90 permit fee and authorizes the Department of Health and Senior Services to set reasonable fees—effectively placing current fees on hold until the new standards take effect.”
OWTS Construction Permit Process — Temporary Permit Fee Suspension ↗Re-checked Sep 23, 2026
County-wide zoningAbsent
Perry County's official county services listing shows no planning/zoning department; unincorporated areas operate without county-wide zoning.
Perry County, MO - Official Website (County Services) ↗From the county’s own site, awaiting a second reviewer

Missouri rules that apply here

Building permitLimited
Building permits for construction in Missouri: no statewide permit is shown; first and second classification counties may adopt building regulations and permits if voters have approved
- Authority is an option for county commissions in counties of the first and second classification, not a statewide mandate
- A county that had not adopted a building code before August 28, 2001 needs voter approval, voted only by voters outside incorporated territory
- Municipalities and other counties must be checked locally
- This claim is about the county enabling authority only; the state septic rule (RSMo 701.031) was not used as a building-permit requirement
“the county commission in all counties of the first and second classification, as provided by law, is for this purpose empowered, subject to the provisions of subsections 2 and 3 of this section, to adopt by order or ordinance regulations to control the construction”
RSMo 64.170 County commissions control construction - issue building permits ↗Re-checked Nov 6, 2026
Owner-builder exemptionAvailable (with conditions)
A property owner installing, modifying, or repairing that owner's on-site sewage disposal system.
- The owner must comply with RSMo 701.025 to 701.059.
- The statute separately provides that an owner need not obtain a permit or contractor registration merely to clean that owner's on-site sewage disposal system.
“Nothing in sections 701.053 to 701.055 shall preclude property owners from installing, modifying or repairing their own on-site sewage disposal system”
RSMo 701.055 — Property owners may install, modify or clean their own on-site sewage disposal system ↗Re-checked Nov 4, 2026
Building code adoptedPartial
Missouri statewide legal framework for building-code adoption by counties and other communities; the statutes authorize local adoption rather than establishing one uniformly adopted statewide building code.
- County authority under RSMo 64.170 applies to counties of the first and second classification.
- A county that had not adopted a building code before August 28, 2001 must obtain voter approval before adopting under RSMo 64.170 to 64.200.
- The adoption vote is limited to voters in the affected area; a code affecting a county is not voted on by citizens of incorporated territory.
- A county adopting under RSMo 64.180 must use a current nationally recognized building code edition from calendar year 1999 or later, as amended.
- A county building ordinance may not conflict with liquefied petroleum gas installation requirements governed by RSMo 323.020.
- A community may incorporate a code by reference only if it otherwise has legal power to adopt the ordinance.
- A code incorporated by reference must be filed with the community clerk and available for public inspection for 90 days before adoption.
- An ordinance adopting a code by reference must state the penalty separately rather than incorporate the penalty by reference.
- RSMo 67.280 defines community to include any county, fire protection district, or municipality, and municipality to include an incorporated city, town, or village.
“Because fire and building codes are adopted at the local level in Missouri”
RSMo Section 64.170 ↗Re-checked Sep 11, 2026
2 more reviewed findings on this topic
- Partial — Residential building-code adoption by Missouri counties, particularly construction in unincorporated county territory.
  “the county commission in all counties of the first and second classification [...] is for this purpose empowered [...] to adopt [...] regulations”
  RSMo § 64.170 — County commissions control construction; issue building permits ↗Re-checked Oct 1, 2026
- Partial — County adoption of residential building codes in Missouri, with the resulting regulations applicable to unincorporated territory when adopted under the statutory authority.
  “the county commission in all counties of the first and second classification, as provided by law, is for this purpose empowered”
  RSMo Section 64.170 — County commissions control construction; issue building permits ↗Re-checked Oct 1, 2026
InspectionsLimited
Construction, major modification, or major repair of an on-site sewage disposal system for which RSMo 701.046 requires notice and an application; this is not a general statewide inspection rule for all buildings.
- The city, county, or department must receive notice and an opportunity to inspect before completion.
- A registered contractor must notify the authority before 9:00 a.m. on the day before completion; an unregistered person must notify it before 9:00 a.m. on the second day before completion.
- The system must remain available for a complete inspection under the state standard until 3:00 p.m. on the completion day unless the authority confirms earlier inspection and approval.
- The system may not be closed or completed if inspection finds it does not meet the state standard; the authority must provide conspicuous notice at inspection and written confirmation of the result, or of no inspection, within three working days of completion.
“without providing notice and an opportunity for inspection by the city, county or department as provided in this section.”
RSMo 701.050 — Construction or repair notice, requirements and inspection ↗Re-checked Nov 4, 2026
Zoning districtsPartial
Missouri statutory authority for counties to create zoning districts in unincorporated territory; this does not establish or publish the actual zoning districts for any particular county.
- The statute applies to unincorporated territory of counties subject to sections 64.211 to 64.295.
- Actual district boundaries, regulations, and maps depend on county adoption and are not supplied by this statewide statute.
- District regulations must be uniform for each class or kind of building or land use within each district, although regulations may differ between districts.
- The regulations must be made in accordance with a comprehensive plan.
“the unincorporated territory may be divided into districts of such number, shape and area as may be deemed best suited”
RSMo Section 64.261 — Zoning districts, creation, regulations ↗Re-checked Oct 5, 2026
Minimum dwelling sizeDistrict specific (with conditions)
Potential county zoning controls on the size of residential buildings in unincorporated portions of first-class counties other than first-class counties without a charter form of government.
- The county commission is authorized to regulate by order in accordance with a comprehensive plan.
- The statute does not state a statewide minimum dwelling-size measurement.
- The statute expressly excludes incorporated portions of counties and identifies additional agricultural, rice-farming, flood-irrigation, farm-structure, and underground-mining exclusions.
“except in counties of the first class not having a charter form of government [...] in the unincorporated portions of the county [...] size of buildings”
RSMo § 64.090 — Planning and zoning powers of county commission ↗Re-checked Nov 4, 2026
SetbacksSpecified
Size of yards, courts and other open spaces in unincorporated portions of second- and third-class counties with county zoning; setbacks left to such counties
- Power exists only for counties to which sections 64.510 to 64.690 apply under section 64.510
- Exercised only after approval by vote of the people as provided in section 64.530
- Must be done by order of record and in accordance with a comprehensive plan
- Applies only to unincorporated portions of the county
- Does not apply to crops, livestock, orchards, forestry, or farm buildings used for such purposes outside the flood hazard area map area
- Existing lawful uses protected; ordinances adopted before March 4, 1991 unaffected
“the size of yards, courts and other open spaces”
RSMo 64.620 Building restrictions - limitations on regulations (second and third class counties) ↗Re-checked Nov 6, 2026
Lot coverageSpecified
Percentage of lots that may be occupied in unincorporated portions of second- and third-class counties with county zoning; lot coverage left to such counties
- Power exists only for counties to which sections 64.510 to 64.690 apply under section 64.510
- Exercised only after approval by vote of the people as provided in section 64.530
- Must be done by order of record and in accordance with a comprehensive plan
- Applies only to unincorporated portions of the county
- Does not apply to crops, livestock, orchards, forestry, or farm buildings used for such purposes outside the flood hazard area map area
- Existing lawful uses protected; ordinances adopted before March 4, 1991 unaffected
“the percentage of lots that may be occupied”
RSMo 64.620 Building restrictions - limitations on regulations (second and third class counties) ↗Re-checked Nov 6, 2026
Camping on your landLimited
Developments where land is sold or leased for camping in recreational vehicles (recreational developments) under the state wastewater rule 10 CSR 20-6.030; this is a wastewater-disposal rule, not a zoning rule on camping generally
- Applies only when land is sold or leased for the purpose of camping in recreational vehicles.
- To qualify as a recreational development, restrictive covenants must prohibit continuous year-round living on the lot, and no cabins or other structures that could be used for year-round residential purposes are allowed.
- Minimum lot size of 20,000 sq ft applies where individual on-site wastewater treatment facilities are used; no reduction from the minimum lot size determined by the geohydrologic evaluation, though a one-half reduction as indicated by the soils report may be allowed.
- Where sewage dump stations provide collection and treatment, they count as centralized collection and treatment.
- The developer must submit a copy of the restrictive covenants with any plans for dump stations or centralized systems.
- Any residential housing development required to obtain department approval must get written approval before sale or lease of any lot or start of construction.
- Rule text says it does not preclude local, municipal, county or other lawful authority from adopting equal or more stringent subdivision, sewer or on-site system regulations.
- Rule was last amended with an effective date of Jan. 30, 2025.
- The state rule does not itself regulate temporary camping on private land outside such developments; that is left to local zoning.
minimum lot size, recreational development with individual on-site wastewater treatment: >= 20000 square feet (one-half reduction per soils report may be allowed; no reduction from geohydrologic evaluation minimum)
“a development is considered recreational when land is sold or leased for the purpose of camping in recreational vehicles. in order to be considered a recreational development, restrictive covenants must prohibit continuous year-round living on the lot and no cabins or other structures will be allowed that could be used for year-round residential purposes.”
10 CSR 20-6 Permits (incl. 10 CSR 20-6.030 Disposal of Wastewater in Residential Housing Developments), Missouri Secretary of State, Code of State Regulations ↗Re-checked Nov 6, 2026
Who permits septicMixed (with conditions)
Onsite wastewater treatment systems statewide in Missouri.
- DHSS administers minimum standards and permits through DHSS, local contract authorities, or local authorities operating under ordinance.
- County or city governments may adopt standards stricter than the state standard.
- DNR regulates lagoons serving anything other than single-family residences, systems discharging to surface waters, systems treating flows greater than 3,000 gallons per day and dispersing through soil absorption systems, and industrial wastewater systems.
- DNR approval is required for subdivisions, mobile home parks, and campgrounds when OWTS use is planned.
domestic wastewater flow threshold: <= 3000 gallons per day (DNR regulates systems with flows greater than 3,000 gallons per day when wastewater is dispersed through soil treatment or absorption systems)
“DHSS OWTS permitting falls under one of three authority types: DHSS Onsite Program, Local Authority (contract), or Local Authority via Ordinance. The application process varies by permitting authority.”
OWTS Construction Permit Process ↗Re-checked Oct 1, 2026
2 more reviewed findings on this topic
- State (with conditions) — Onsite wastewater treatment systems in Missouri, including Perry County, that are within the cited DHSS or DNR jurisdictional categories.
  “The Missouri Department of Health and Senior Services (DHSS) regulations cover:”
  OWTS Construction Permit Process ↗Re-checked Sep 11, 2026
- Mixed — Missouri wastewater treatment systems, including domestic onsite systems, larger-flow systems, direct discharges, lagoons, subdivisions, and industrial wastewater.
  “In Missouri, different state and local agencies are responsible for regulating wastewater treatment systems.”
  On-site Septic Systems and Subdivisions ↗Re-checked Sep 11, 2026
Septic permitRequired
Installing or repairing most onsite wastewater treatment systems in Missouri, including residential systems subject to state permitting.
- A construction permit is required before installing or repairing most OWTS.
- Some single-family residential lots may be exempt.
- For residential property less than three acres, a permit is required; the exemption does not apply in some counties, so the county authority must be checked.
- Work should not begin until a permit is issued or an exemption is confirmed.
- Effective August 28, 2026, application fees for onsite sewage disposal system construction, modifications, and repairs are temporarily suspended.
residential lot threshold: < 3 acres (The exemption does not apply in some counties.) · temporary permit-fee suspension effective date: 2026-08-28 (Applies to application fees associated with onsite sewage disposal system construction, modifications, and repairs.)
“A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
OWTS Construction Permit Process ↗Re-checked Sep 11, 2026
3 more reviewed findings on this topic
- Required — Installation or repair of onsite wastewater treatment systems in Missouri, including Perry County, where state permitting applies.
  “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS).”
  OWTS Construction Permit Process ↗Re-checked Sep 11, 2026
- Required — Installing or repairing most onsite wastewater treatment systems statewide in Missouri.
  “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
  OWTS Construction Permit Process ↗Re-checked Oct 1, 2026
- Required — Proposed campgrounds, mobile home parks, and subdivisions planning to use onsite wastewater treatment systems anywhere in Missouri.
  “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned.”
  OWTS Construction Permit Process ↗Re-checked Oct 1, 2026
Septic inspectionLimited
Inspection or evaluation of existing onsite wastewater systems in connection with Missouri real-estate transfers.
- Local public health agencies generally no longer inspect existing systems for real-estate transfers.
- A private licensed inspector may perform an inspection or evaluation.
- A lender, buyer, or other transaction participant may require an assessment.
- Some local standards may be more stringent than state regulations.
- Inspections and evaluations are distinct; an inspection includes a hydraulic test, while an evaluation does not.
“For the most part, local public health agencies no longer inspect existing systems related to real estate transfer. The help of a licensed inspector can be obtained to check the condition of the system.”
Onsite Wastewater Treatment System Inspections Versus Evaluations ↗Re-checked Sep 11, 2026
2 more reviewed findings on this topic
- Not required — Onsite wastewater system inspections or evaluations before a real-estate transaction in Missouri, including Perry County.
  “Does the law require [...] prior to a real estate transaction? No.”
  health.mo.gov ↗Re-checked Sep 11, 2026
- Limited — Inspections of existing onsite sewage systems in connection with property sales statewide in Missouri.
  “Missouri Department of Health and Senior Services' (DHSS) rules governing onsite sewage systems cover minimum construction requirements, system inspections at the time of property sales, and requirements for percolation testers and soil evaluators.”
  health.mo.gov ↗Re-checked Oct 1, 2026
Off-grid sanitationLimited
Off-grid domestic wastewater treatment using onsite wastewater treatment systems where central sewer service is unavailable.
- Onsite systems treat and dispose of domestic sewage on the property where generated.
- A construction permit is generally required, including for residential property less than three acres, subject to county-specific exceptions.
- Wastewater may not be discharged into a road ditch or onto the ground.
- Local permitting authorities may impose additional requirements.
residential lot threshold: < 3 acres (The exemption does not apply in some counties.)
“Onsite wastewater treatment systems are sometimes referred to as "septic systems." These systems treat and dispose of domestic sewage on the property where it is generated.”
health.mo.gov ↗Re-checked Sep 11, 2026
2 more reviewed findings on this topic
- Limited — On-property treatment and disposal of domestic sewage through onsite wastewater treatment systems in Missouri, including Perry County.
  “No. Your system cannot pose a threat to public health or to the environment.”
  health.mo.gov ↗Re-checked Sep 11, 2026
- Allowed (with conditions) — Use of onsite wastewater treatment systems as off-grid sanitation where central sewer service is unavailable in Missouri.
  “In Missouri, where central sewer service is not available, homeowners and small business owners use various types of onsite wastewater treatment systems (OWTS).”
  Onsite Wastewater Treatment ↗Re-checked Oct 1, 2026
Well permitLimited
Construction or alteration of a public well serving a Missouri public water system.
- Public water systems must receive written approval from the Missouri Department of Natural Resources Public Drinking Water Branch before constructing or altering a public well.
- The requirement does not apply when the system meets the charitable-and-benevolent-organization exemptions in section 640.116, RSMo.
- Anyone proposing to install a public well must contact the department’s regional office for a well-site survey.
- The survey addresses minimum isolation or setback distances from known or potential contaminant sources, including septic tanks, sanitary sewer lines, and landfills.
- Before applying for construction authorization, the public water system must obtain an estimated casing-depth letter from the Missouri Geological Survey Water Resources Center.
- There is no fee for the well-site-survey and estimated-casing-depth-letter services.
- Failure to obtain construction authorization may result in approval delays and possibly require the owner to properly plug the well and drill a new one according to 10 CSR 60-3.
public water system threshold: at least 15 service connections or regularly serves an average of at least 25 individuals daily, at least 60 days per calendar year
“Public water systems must receive written approval from the PDWB before constructing or altering a public well”
Who Regulates Water Wells in Missouri? - PUB4001 ↗Re-checked Oct 5, 2026
3 more reviewed findings on this topic
- Required — Construction or alteration of a public water-system well in Missouri, including Perry County.
  “Public water systems must receive written approval from the PDWB before constructing or altering a public well”
  Who Regulates Water Wells in Missouri? - PUB4001 ↗Re-checked Sep 11, 2026
- Required — A person or contractor conducting regulated work to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a water well, heat-pump well, monitoring well, or related well in Missouri.
  “A non-restricted permit is required to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a well.”
  Well and Pump Installation Contractor Permitting ↗Re-checked Oct 1, 2026
- Limited — Construction or repair of water wells, installation or replacement of pumps, and associated plumbing and electrical work in Missouri.
  “A non-restricted water well installation permit is required to construct or repair a water well in Missouri.”
  Water Wells - PUB2945 ↗Re-checked Oct 5, 2026
Mandatory utility hookupSewer (with conditions)
Missouri state law preserves the authority of specified local governments and districts that own or operate a sewage-collection-and-treatment sewer system to require connection by owners of houses, buildings, or other facilities within that entity's territory.
- This is an authorization for the applicable city, town, village, sewer district, public water supply district, municipality, political subdivision, or district; it is not a statewide mandate that every property connect.
- The entity must own or operate a sewer system providing collection and treatment of sewage.
- The house, building, or other facility must be within the municipality, political subdivision, or district.
- The sewer system must be available.
- The statute identifies sewer districts organized under chapter 204 or chapter 249 and public water supply districts organized under chapter 247 among the entities whose authority is preserved.
“to require the owners of all houses, buildings or other facilities [...] to connect to the sewer system [...] when such sewer system is available.”
Missouri Revisor of Statutes — RSMo § 644.027 ↗Re-checked Nov 4, 2026
Agricultural exemptionAvailable (with conditions)
Farm buildings and farm structures used for agricultural purposes under the county building and land-use restriction provisions of RSMo sections 64.800 to 64.905.
- The exemption does not apply within incorporated portions of counties.
- The exemption applies to raising crops, livestock, orchards, or forestry and to specified rice-farming or flood-irrigation impoundments.
- For farm buildings or farm structures, the area must not be within the area shown on the flood hazard area map.
- The statute preserves the validity of county ordinances or orders adopted before March 4, 1991.
- Other laws and local requirements may still apply.
rice-farming or flood-irrigation berm height: <= 18 inches (small berms placed around a field to hold water for growing rice or flood irrigation)
“This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the flood hazard area map.”
RSMo Section 64.890 — Building and land use restrictions; exemptions ↗Re-checked Oct 5, 2026
5 more reviewed findings on this topic
- Available — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures in Missouri counties, including Perry County, to the extent a county fire-protection or fire-prevention ordinance would otherwise impose regulations or require permits.
  “28 Aug 2025 [...] no fire protection or fire prevention ordinance adopted by any county [...] shall [...] impose regulations or [...] require permits [...] farm buildings or farm structures.”
  RSMo Section 64.003 — Farm buildings and farm structures ↗Re-checked Sep 11, 2026
- Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures as against county fire-protection or fire-prevention ordinances.
  “Notwithstanding any provision of law to the contrary, no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits with respect to the erection, maintenance, repair, alteration, or extension of farm buildings or farm structures.”
  RSMo Section 64.003 — Farm buildings and farm structures ↗Re-checked Sep 11, 2026
- Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures used for agricultural purposes under RSMo section 64.890, outside incorporated portions of counties and outside areas shown on flood hazard area maps.
  “This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes [...]”
  RSMo Section 64.890 ↗Re-checked Oct 1, 2026
- Available (with conditions) — Farm buildings and farm structures statewide, with respect to county fire-protection and fire-prevention ordinances.
  “no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits [...]”
  revisor.mo.gov ↗Re-checked Oct 1, 2026
- Available — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures with respect to county fire-protection or fire-prevention ordinances.
  “Notwithstanding any provision of law to the contrary, no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits with respect to the erection, maintenance, repair, alteration, or extension of farm buildings or farm structures.”
  RSMo Section 64.003 — Farm buildings and farm structures ↗Re-checked Oct 5, 2026
Subdividing landLimited
Subdivision plats in the unincorporated areas of counties covered by RSMo section 64.070 after the county commission adopts subdivision regulations.
- The county commission must first adopt subdivision regulations.
- The plat must first be submitted to the planning commission.
- If the county planning commission does not report upon the plat within thirty days, it may then be deemed approved.
- If amended or rejected by the planning commission, the action may be overruled and the plat approved only by the county commission, with the reasons for overruling spread upon the county commission minutes.
- The recorder of deeds may not record the plat until receiving a certificate of authority from the county zoning enforcement officer.
- The statute also permits a county planning commission, upon written request of an incorporated area's legislative body where there is no municipal planning commission, to pass upon subdivision plats within that incorporated area; those plats are subject to county planning commission rules and approval procedures.
planning commission reporting period: 30 days (If no report is made, the plat may then be deemed approved.)
“After the county commission shall have adopted such subdivision regulations, no plat of a subdivision of land within the unincorporated area of such county [...]”
RSMo Section 64.070 ↗Re-checked Oct 1, 2026
One more reviewed finding on this topic
- Limited — Subdivision regulations adopted by Missouri cities, towns, or villages under RSMo section 89.410.
  “The planning commission shall recommend and the council may by ordinance adopt regulations governing the subdivision of land within its jurisdiction.”
  RSMo Section 89.410 ↗Re-checked Oct 1, 2026
Driveway accessRequired
Construction or modification of driveways within MoDOT right-of-way statewide.
- A permit is required for construction of driveways and modifications to existing driveways on MoDOT right-of-way.
- An initial online request must be submitted for each planned listed activity.
- Engineered plans, traffic studies, hydraulic analysis, traffic-control plans, surety deposits, or performance bonds may be required depending on the work.
- The rule does not establish a permit requirement for driveways outside MoDOT right-of-way.
“We require you to obtain a permit to work on MoDOT's Right of Way for: Construction of driveways”
Permits | Missouri Department of Transportation ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Required — Residential, side-road, commercial, and other entrances connecting to Missouri Department of Transportation right-of-way in Perry County.
  “Types of Entrances Requiring Permits Typical entrance details Type I: Residential Driveway”
  Types of Entrances Requiring Permits ↗Re-checked Sep 11, 2026
Building in a floodplainLimited
Projects including mining, dredging, building construction, and other dirt-moving activities in designated flood hazard areas within participating Missouri jurisdictions.
- The source describes local county or city flood damage reduction ordinances rather than one uniform statewide ordinance.
- The project must be within a participating jurisdiction.
- The project must be within a designated flood hazard area.
- The cited rule does not apply if either condition is absent.
- Covered projects must not raise flood heights.
“Some jurisdictions (for example, county, city) require any projects in certain floodplains do not raise flood heights.”
Laws and Regulations That Might Affect You if You Mine Sand or Gravel From Missouri Streams ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Required — All development in a Missouri floodplain, administered through the applicable community floodplain permitting process.
  “Regardless, some type of permit MUST be issued for ALL development in the floodplain.”
  Floodplain Forms ↗Re-checked Oct 5, 2026
Permit processPublished (with conditions)
Installation or repair of most onsite wastewater treatment systems in Missouri.
- Some single-family residential lots may be exempt from permitting.
- The applicant must determine which agency has permitting authority where the work is being done.
- DHSS permitting may be administered by the DHSS Onsite Program, a local authority under contract, or a local authority via ordinance.
- Work should not begin until a permit has been issued or an exemption has been confirmed.
- DHSS regulates single-family residential systems and onsite or cluster systems treating domestic wastewater flows of 3,000 gallons per day or less that disperse wastewater through soil treatment or absorption systems.
- DNR regulates other systems, including non-single-family lagoons, systems discharging to surface waters, systems over 3,000 gallons per day, and industrial wastewater systems.
- DNR must approve subdivisions, mobile home parks, and campgrounds if OWTS use is planned.
domestic wastewater flow threshold: <= 3000 gallons per day (Systems above this threshold are regulated by DNR when they disperse wastewater through soil treatment or absorption systems.)
“A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
OWTS Construction Permit Process ↗Re-checked Oct 5, 2026
2 more reviewed findings on this topic
- Published (with conditions) — Work requiring a permit in Missouri Department of Transportation right-of-way within Perry County, including driveway work.
  “Depending upon the nature of the work, other documentation may be required before your permit can be processed.”
  Permit Process ↗Re-checked Sep 11, 2026
- Published (with conditions) — Permit applications for work on Missouri Department of Transportation right-of-way statewide.
  “Contact the Traffic Specialist a minimum of 48 hours prior to beginning work and for all necessary inspections.”
  Permit Process | Missouri Department of Transportation ↗Re-checked Sep 11, 2026
county zoning authorityLimited
Missouri county zoning authority over unincorporated land.
- RSMo § 64.850 applies to counties of the first class without a charter and counties of the second, third, or fourth class.
- RSMo § 64.620 applies to counties of the second or third class to which §§ 64.510–64.690 apply.
- Adoption under §§ 64.510–64.690 requires approval by vote of the people under § 64.530.
- The authority applies in unincorporated portions and not incorporated portions.
- The regulations must be in accordance with a comprehensive plan.
- Under § 64.090, the zoning power does not apply to raising crops, livestock, orchards, or forestry; seasonal or temporary rice-farming or flood-irrigation impoundments; specified farm structures outside mapped flood-hazard areas; or underground mining entered through shafts outside mapped flood-hazard areas.
- Existing lawful uses and specified public-utility services are protected under the cited statutory schemes.
“the county commission of any county of the first class not having a charter form of government, or of any county of the second, third or fourth class may, after approval by vote of the people as provided in section 64.845, regulate and restrict, by order of record, in the unincorporated portions of the county, the height, number of stories, and size of buildings, the percentage of lots that may be occupied, the size of yards, courts and other open spaces, the density of population, the location and use of buildings, structures and land for trade, industry, residence or other purposes.”
RSMo § 64.850 — County commission may prescribe zoning regulations ↗Re-checked Oct 1, 2026
2 more reviewed findings on this topic
- General — Missouri counties adopting zoning regulations for unincorporated territory.
  “If a majority of the votes cast is in favor of county zoning, the county commission shall proceed with a program of county zoning”
  RSMo § 64.090 — Planning and zoning powers of county commission ↗Re-checked Sep 21, 2026
- Limited — Missouri county zoning of unincorporated land.
  “counties of the second, third or fourth class may, after approval by vote of the people [...] in the unincorporated portions of the county”
  RSMo § 64.090 — Planning and zoning powers of county commission ↗Re-checked Oct 1, 2026
county building authorityLimited
County authority to regulate residential construction and issue building permits in unincorporated areas of Missouri.
- The authority under sections 64.170 to 64.200 applies to counties of the first and second classification.
- A county that had not adopted a building code before August 28, 2001, must obtain voter approval before adopting one under those sections.
- Only voters in the area affected by the proposed code may vote; incorporated-territory citizens cannot vote on a code affecting a county.
- The county commission must hold at least three public hearings and provide the statutory newspaper publication and county posting notices before adoption.
- Regulations adopted under section 64.180 apply to unincorporated territory, except as otherwise provided.
- Adopted or amended codes after August 28, 2001, must use a current, calendar year 1999 or later edition of a nationally recognized building code, as amended.
- A county building ordinance may not conflict with liquefied petroleum gas installations governed by section 323.020.
public hearings before adoption: >= 3 hearings minimum (Section 64.180(3)) · newspaper notice: >= 15 days (Notice of hearing time and place must be published in at least two newspapers having general circulation within the county) · posted notice: >= 15 days (Notice must be posted in four conspicuous places in the county) · minimum nationally recognized building-code edition: >= calendar year 1999 edition year (Applies after August 28, 2001, under section 64.180)
“The regulations adopted shall be applicable to the unincorporated territory of the county, except as otherwise provided herein”
RSMo Section 64.170 — County commissions control construction; issue building permits ↗Re-checked Oct 1, 2026
2 more reviewed findings on this topic
- Limited — County regulation of construction and issuance of building permits for buildings, including residential construction, in Missouri counties, with the practical focus on county-controlled areas outside incorporated territory.
  “the county commission in all counties of the first and second classification [...] is for this purpose empowered [...] to adopt [...] regulations to control the construction”
  RSMo § 64.170 — County commissions control construction and issue building permits ↗Re-checked Sep 21, 2026
- Limited — Missouri counties' authority to require permits and regulate residential construction in unincorporated areas.
  “Before the adoption of such code of regulations, the county commission shall hold at least three public hearings thereon”
  RSMo § 64.170 — County commissions control construction; issue building permits ↗Re-checked Oct 1, 2026

Inside cities and towns in Perry County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Building code adoptedAdopted (with conditions)
Building-code enforcement within the incorporated City of Perryville, Perry County, Missouri.
- The source applies to the City of Perryville and does not establish countywide or unincorporated-area adoption.
- The listed codes include the 2021 International Building Code, 2021 International Fire Code, 2021 International Fuel Gas Code, 2021 International Mechanical Code, 2021 International Plumbing Code, 2021 International Existing Building Code, 2021 International Swimming Pool & Spa Code, and 2023 National Electrical Code.
“The City of Perryville follows the requirements of the following international / national codes: 2021 International Building Code 2021 International Fire Code 2021 International Fuel Gas Code 2021 International Mechanical Code 2021 International Plumbing Code 2021 International Existing Building Code 2021 International Swimming Pool & Spa Code 2023 National Electrical Code”
Building Code Information ↗Re-checked Sep 11, 2026
Local zoningPresent (with conditions)
Residential and commercial development within the City of Perryville, an incorporated municipality in Perry County, Missouri.
- The City of Perryville reviews construction plans and enforces city zoning ordinances throughout the construction process.
- The zoning map states: "Please reference the City of Perryville Municipal Code for allocations and restrictions of zones."
- The zoning map also states: "Please verify current zoning classifications of specific properties with City staff."
zoning map effective date: 2026-06-16
“Perryville, MO Zoning Classifications Effective: June 16, 2026 [...] Please reference the City of Perryville Municipal Code for allocations and restrictions of zones.”
Building Inspector / Zoning Administrator ↗Re-checked Oct 7, 2026
2 more reviewed findings on this topic
- Present (with conditions) — Zoning within the incorporated City of Perryville, Perry County, Missouri.
  “The Planning and Zoning Commission prepares the city comprehensive plan, subdivision rules and regulations, and zoning ordinance.”
  Planning & Zoning Commission ↗Re-checked Sep 11, 2026
- Present (with conditions) — The incorporated City of Perryville within Perry County, Missouri.
  “The Planning and Zoning Commission prepares the city comprehensive plan, subdivision rules and regulations, and zoning ordinance. Makes recommendations to the City Council regarding zoning changes, special use permits, subdivision plats, and other developmental policy issues.”
  Planning & Zoning Commission | Perryville, MO - Official Website ↗Re-checked Oct 6, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Certificate of occupancy — Certificates of occupancy for buildings in Perry County, including unincorporated areas.
Minimum lot size — Minimum lot size for land in unincorporated Perry County.
Building height — Building-height limits in unincorporated Perry County.
Living in an RV — Long-term or residential occupancy of recreational vehicles on private land in Perry County, including unincorporated areas.
Tiny homes — Occupancy of a tiny home on private land in Perry County, including unincorporated areas.

2 more unanswered

Manufactured homes
Accessory dwellings

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Perry County, Missouri

Is Perry County a good place to live off-grid or homestead?

Perry County scores 70/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

How much does land cost in Perry County, Missouri?

Land in Perry County runs about $4,388 per acre, based on the latest county data.

What is the water situation in Perry County?

Perry County gets about 46" of rain a year, with severe drought in roughly 2.6% of years.

How remote is Perry County?

A representative private-land location has about 20,542 people within a 30-minute drive and 3,234,166 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and land rules in Perry County, Missouri