Unincorporated Perry County, Missouri is listed as not requiring a residential building permit, but the county does not publish an explicit statement confirming that answer1. Countywide zoning is also not firmly confirmed, so ask the County Commission about the parcel before relying on a no-zoning assumption2. Missouri DHSS handles Perry County septic permitting3.
At a glance
- Building permit
- Classified as not required, but not expressly confirmed on a county page1
- Zoning
- Countywide zoning is not firmly confirmed; Perryville has city zoning24
- Septic permits
- Missouri DHSS is the permitting authority for Perry County3
- Septic soils
- Only 4.2% of soils lack severe limits for a conventional drain field5
- RV or tiny-home living
- Not confirmed; ask the County Commission before buying or occupying land2
- Owner-builder
- No Perry County owner-builder exemption was confirmed6
- State-highway driveway
- A MoDOT entrance permit is required for work in MoDOT right-of-way7
Who to call
Also useful
Parcel-specific questions when no county building or zoning office is published
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
406 N. Spring, Suite #1, Perryville, MO 63775
Septic permits
Missouri Department of Health and Senior Services Onsite Wastewater Treatment Program
Onsite wastewater construction permit applications and general permitting questions
PO Box 570, Jefferson City, MO 65102-0570
Roads & driveways
Perry County Road & Bridge Department
County-road maintenance and county-road access questions
4803 N. Hwy. 51, Perryville, MO 63775
Contact details are copied from each office’s official page and were checked against it on September 28, 2026.
Do you need a building permit in Perry County, Missouri?
Residential building permits are listed as not required in unincorporated Perry County, and the Missouri building-code data cited for the county lists no adopted residential code1. The available county pages do not expressly say that Perry County has no building code, permit, inspection or certificate-of-occupancy requirement, so obtain parcel-specific confirmation from the County Commission before construction18. Missouri law gives qualifying counties authority to adopt construction regulations, permits, inspections and fees, with voter approval required in certain circumstances9. Inside the incorporated City of Perryville, the answer changes because the city has adopted building codes10. A farm structure also is not automatically free of every rule: Missouri's farm-building exemption is limited to county fire-protection and fire-prevention ordinances11.
Who issues permits in Perry County, Missouri?
Perry County does not publish a building or codes office in the available county material, and the residential permit answer is not expressly stated on a county page1. The County Commission is the practical first stop for written confirmation about an unincorporated parcel; its published phone number is (573) 547-42428. Septic is clearer: Missouri DHSS is the Perry County permitting authority, while the Perry County Health Department directs septic applicants to the state312. DHSS says most new or repaired onsite wastewater systems require a construction permit and work should wait until a permit or exemption is confirmed13. Perry County Road & Bridge handles county-road questions and publishes its office contact on the county site14. A driveway connecting within MoDOT right-of-way follows the separate state entrance-permit process7.
Does Perry County have zoning?
Perry County is listed as operating without countywide zoning, but the county services page does not explicitly say zoning is absent2. Treat setbacks, minimum lot size, building height, lot coverage, subdivision rules and floodplain approval as questions for the County Commission, because we could not confirm current Perry County rules for those topics28. Missouri law allows certain counties to establish zoning for unincorporated territory after approval by county voters, but that statewide authority does not prove Perry County adopted zoning15. The incorporated City of Perryville is different: its Planning and Zoning Commission prepares the city plan, subdivision rules and zoning ordinance4. Confirm the parcel's jurisdiction before applying Perryville's rules or assuming they do not apply4.
How do septic permits work in Perry County?
Missouri DHSS handles onsite wastewater permitting for Perry County, following the county health department's handoff to the state on July 1, 2025312. A construction permit is required before installing or repairing most onsite wastewater systems, although some single-family residential lots may qualify for an exemption16. Residential property under 3 acres requires a permit, and work should not start until DHSS issues the permit or confirms an exemption16. Permit application fees for construction, modification and repairs are temporarily suspended effective August 28, 202617. Only 4.2% of Perry County soils lack severe limits for a conventional drain field, so make the site and soil evaluation an early purchase contingency5. Missouri does not impose a universal septic inspection before a real-estate transfer, although a buyer or lender may request one and local requirements can be stricter18.
Can you live in an RV or tiny home in Perry County?
We could not confirm a Perry County rule that allows or prohibits full-time RV or tiny-home occupancy on private land2. The uncertain countywide zoning record does not make an RV, tiny home, manufactured home or accessory dwelling automatically legal on every unincorporated parcel2. Ask the County Commission about land use, setbacks, floodplain status and any occupancy approval before buying for that purpose2. Ask Missouri DHSS how the proposed dwelling must handle wastewater, because onsite sewage remains regulated even when a structure is small or off-grid19. Wastewater cannot be discharged into a road ditch or onto the ground, and the system cannot threaten public health or the environment19. Inside Perryville, city zoning and adopted building codes apply instead of the uncertain unincorporated-county picture410.
How do you build a home in Perry County, step by step?
- Confirm whether the parcel is unincorporated, because Perryville has separate zoning and adopted building codes410.
- Ask the County Commission for written confirmation of building-permit, zoning, subdivision, setback and floodplain requirements for the parcel12.
- Arrange a soil and site evaluation early because only 4.2% of county soils lack severe limits for a conventional drain field5.
- Apply through Missouri DHSS for the onsite wastewater permit or written exemption before work begins1316.
- Ask Perry County Road & Bridge about county-road access, or obtain a MoDOT entrance permit when the driveway is in state right-of-way147.
- Keep the jurisdiction confirmations with the project records because the county's residential permit classification is not backed by an explicit county statement1.
What should you check before buying land in Perry County?
Make septic feasibility a contract contingency: only 4.2% of Perry County soils lack severe limits for a conventional drain field5. Perry County receives about 46 inches of precipitation annually, while 62% of its land has slopes of 15% or less and 43.2% is wooded202122. Verify legal road access with Perry County Road & Bridge for a county road or with MoDOT for an entrance in state right-of-way147. Confirm city limits because Perryville's zoning and building codes are municipality-specific410. The typical home value is about $238,336, the effective property-tax rate is about 0.7%, and the median annual property-tax bill is about $1,368232425. If the property will be short-term lodging, Perry County requires a 6% tourism tax and electronic reporting through its lodging-tax process26.
Watch-outs
- Perry County's residential building-permit classification is not supported by an explicit county statement, so ask the County Commission for written parcel-specific confirmation1.
- Countywide zoning, RV and tiny-home occupancy, setbacks, subdivision rules and floodplain approval remain unconfirmed for unincorporated Perry County2.
- Perryville has its own zoning and building codes; do not apply the unincorporated-county answer inside city limits410.
- Perry County septic permitting moved to Missouri DHSS on July 1, 2025312.
Sources
- State of Missouri Data Portal - County Building Codes for Missouri (2026 county census)
- Perry County, MO - Official Website (County Services) (2026 county census)
- Perry County Health Department (2026 county census)
- Planning & Zoning Commission, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- (2026 county census)
- Types of Entrances Requiring Permits, quoted and re-checked
- Perry County Commission (perrycountymo.us)
- RSMo § 64.170 — County commissions control construction and issue building permits (Missouri statewide rule), quoted and re-checked
- Building Code Information, quoted and re-checked
- RSMo Section 64.003 — Farm buildings and farm structures, quoted and re-checked
- Perry County Health Department (perrycountyhealth.com)
- Missouri Department of Health and Senior Services Onsite Wastewater Treatment Program (health.mo.gov)
- Perry County Road & Bridge Department (perrycountymo.us)
- RSMo § 64.090 — Planning and zoning powers of county commission (Missouri statewide rule), quoted and re-checked
- OWTS Construction Permit Process, quoted and re-checked
- OWTS Construction Permit Process — Temporary Permit Fee Suspension, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Transient Sales Tax, quoted and re-checked
Written September 28, 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.