Bolthole Index

Posey County, Indiana

Building permits, zoning and land rules in Posey County, Indiana

61Index Score / 100
#33 of 92 in Indiana

Posey County, Indiana requires county construction permits and inspections outside the city limits of Mt. Vernon, New Harmony, Poseyville and Griffin12. Unincorporated land is subject to county planning and zoning, and the Area Plan Commission may require an Improvement Location Permit before the Building Department issues a building permit34. County septic and sewer permits come from the Posey County Health Department5.

At a glance

Building permit
Required through the county outside Mt. Vernon, New Harmony, Poseyville and Griffin12
Zoning
Yes for unincorporated Posey County; start with the Area Plan Commission3
Septic permits
Issued by the Posey County Health Department56
RV living
A private-land residential rule could not be confirmed; ask the Area Plan Commission3
Tiny homes
No county occupancy rule was confirmed; zoning and permits still need parcel-specific review31
Owner-builder exemption
Not confirmed by the county; ask the Building Department before relying on one7
Agricultural buildings
Qualifying farm buildings remain permit-required but are exempt from county building fees8
Private wells
A Posey County permit requirement could not be confirmed; ask the Health Department9

Who to call

Building permits

Posey County Building Department

Issues construction permits and inspects residential and commercial construction outside the listed city limits

812-838-1324

[email protected]

126 East Third St. Room 132- Mt. Vernon

Online permits →

Planning & zoning

Posey County Area Plan Commission Office

Answers zoning and subdivision questions and processes land-use and Improvement Location Permits

(812) 838-1323

[email protected]

126 E Third Street Rm 132 Mt. Vernon, IN 47620

Online permits →

Septic permits

Posey County Health Department

Issues county septic and sewer permits

(812) 838-1328

100 Vista Dr. Mount Vernon, IN 47620

Roads & driveways

Posey County Highway Department

Answers county-road and access questions

(812) 838-1334

[email protected]

1203 O’Donnell Road Mt. Vernon, IN 47620

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

Do you need a building permit in Posey County, Indiana?

Yes. The Posey County Building Department issues construction permits within the county, with the city limits of Mt. Vernon, New Harmony, Poseyville and Griffin excluded from that county process110. The department inspects residential and commercial structures built or remodeled in the same county-administered area2. Indiana’s current residential standard is the 2020 Indiana Residential Code, based on the 2018 International Residential Code with Indiana amendments11.

A qualifying agricultural building on a farm of at least 50 acres may be exempt from county building fees when it is primarily used for agricultural purposes, but the county expressly requires all proper permits even for that fee exemption8. Posey County also requires a final inspection and certificate of occupancy before a residential or commercial building may be occupied12.

Who issues Posey County building permits, and how do you reach them?

The Posey County Building Department issues county construction permits and conducts inspections from the ground up outside the excluded city limits10. Reach the office at 126 East Third St. Room 132- Mt. Vernon, by phone at 812-838-1324 or by email at [email protected]10. Building-permit applications can also begin through the county’s online permitting portal10.

Land-use review is separate. The Posey County Area Plan Commission Office answers zoning and subdivision questions and provides an online application route for Improvement Location Permits13. Reach planning at 126 E Third Street Rm 132 Mt. Vernon, IN 47620, by phone at (812) 838-1323 or by email at [email protected]13. Ask the relevant city about permitting if the parcel lies inside Mt. Vernon, New Harmony, Poseyville or Griffin, because the county building department’s stated jurisdiction excludes those city limits2.

Does Posey County, Indiana have zoning?

Yes. The Posey County Area Plan Commission administers planning and zoning for unincorporated Posey County3. The planning office specifically directs people remodeling or building in Posey County to call about zoning, subdividing, operating a business or placing a mobile home13. A land-use application requires parcel and site information, so confirm the zoning district and permitted use before treating a listing’s description as proof that a home, business or mobile home is allowed13.

The county’s reviewed material did not establish universal setback, minimum-lot-size, minimum-home-size, height or lot-coverage figures. Those answers depend on the parcel and applicable zoning provisions, so give the Area Plan Commission the property address or legal description and proposed use. If you plan to divide land outside municipal boundaries, Indiana requires an approved, surveyed plat to be recorded before lots are sold, while an adopted local subdivision-control ordinance can place plat approval with the plan commission14.

How do septic permits work in Posey County?

Posey County septic and sewer permits are obtained from the Posey County Health Department6. The Health Department is at 100 Vista Dr. Mount Vernon, IN 47620 and can be reached at (812) 838-132815. Ask that office about the site evaluation, permit sequence and inspections for the particular parcel because a county-specific inspection rule was not confirmed.

Indiana’s residential on-site sewage rule is administered locally by boards of health, while local permit programs remain subject to Indiana Department of Health review16. A home that cannot connect to sanitary sewer generally needs a compliant on-site system with a septic tank and soil absorption system; drywells and cesspools are not allowed17. Only about 28.6% of Posey County soils are rated without severe limitations for a conventional septic drain field, so a buyer should not assume a standard system will suit an untested homesite18.

Can you live in an RV or tiny home on land in Posey County?

Posey County’s reviewed materials do not confirm a general rule allowing long-term residential RV occupancy on a private parcel. Indiana’s campground rule addresses regulated campgrounds rather than residential occupancy on an individually deeded lot, so it does not answer whether an RV can serve as a home on private land in Posey County19. Ask the Area Plan Commission about the parcel’s zoning and intended duration before moving an RV onto the property313.

A countywide tiny-home occupancy rule and minimum dwelling size were also not confirmed. A tiny home intended as a dwelling should be reviewed by both the Area Plan Commission and Building Department because unincorporated land is zoned and county construction permits are required in the county-administered area31. Posey County likewise does not publish a confirmed owner-builder exemption in the reviewed material, so building the home yourself should not be treated as an exemption from permits or inspections7.

Building a home in Posey County, Indiana: the steps, in order

  1. Identify whether the parcel is in the county-administered area or inside Mt. Vernon, New Harmony, Poseyville or Griffin, which the county Building Department excludes from its jurisdiction2.
  2. Contact the Area Plan Commission to confirm zoning, the proposed use and whether the project needs an Improvement Location Permit; a project that does not change the existing building footprint may not need that location permit, but the county says to check with planning4.
  3. If the property will use septic, obtain the county septic or sewer permit from the Posey County Health Department6.
  4. Submit a complete building-permit application with the site plan, construction plans and any applicable state release4.
  5. Schedule required inspections as construction progresses; the county asks applicants to schedule at least 24 hours ahead when possible4.
  6. Complete the final inspection and obtain the certificate of occupancy before moving into the building12.

What should you check before buying land in Posey County?

Confirm the parcel’s jurisdiction and zoning before closing, then ask the Area Plan Commission about the intended home type, setbacks, access, subdivision history and any Improvement Location Permit313. Test the proposed septic area early because only about 28.6% of county soils are rated without severe limits for a conventional drain field18. Posey County’s typical farmland value is about $7,200 per acre, while the effective property-tax rate is about 0.6% and the median annual property-tax bill is about $1,370; use parcel-specific records rather than those countywide benchmarks for an offer202122.

Ask the Posey County Highway Department at (812) 838-1334 about access from a county road because a county driveway rule was not confirmed23. A driveway connecting to an Indiana state highway needs permission from INDOT through its electronic permit system24. Check flood maps as well: Indiana DNR regulates most development activities in floodways, while floodplain-fringe development has no state permit but may still require local approval2526.

Watch-outs

  • The county Building Department does not administer construction inside Mt. Vernon, New Harmony, Poseyville or Griffin, so use the relevant city’s process for a parcel within those limits2.
  • A qualifying agricultural building may avoid county permit fees, but it does not avoid the county’s permit requirement8.
  • Posey County requires the final inspection and certificate of occupancy before anyone moves into a county-administered residential or commercial building12.
  • Residential RV use, tiny-home occupancy, minimum dwelling size and an owner-builder exemption remain unconfirmed; ask planning and building about the exact parcel and project37.

Sources

  1. Posey County Building Commissioner (2026 county census)
  2. Building Commissioner - Posey County Government Building Department, quoted and re-checked
  3. Posey County Area Plan Commission (2026 county census)
  4. Building Commissioner - Posey County Government Building Department, quoted and re-checked
  5. Building Commissioner - Posey County Government Building Department (2026 county census)
  6. Building Commissioner - Posey County Government Building Department, quoted and re-checked
  7. (2026 county census)
  8. Posey County Building Commissioner Fee Schedule, quoted and re-checked
  9. Recommended Standards For Private Water Wells (Indiana statewide rule), quoted and re-checked
  10. Posey County Building Department (poseycountyin.gov)
  11. Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
  12. Building Commissioner - Posey County Government Building Department, quoted and re-checked
  13. Posey County Area Plan Commission Office (poseycountyin.gov)
  14. 2023 County Recorders Resource Library (Indiana statewide rule), quoted and re-checked
  15. Posey County Health Department (in.gov)
  16. 410 IAC 6-8.3 Residential On-Site Sewage Systems (Indiana statewide rule), quoted and re-checked
  17. 410 IAC 6-8.3 Residential On-Site Sewage Systems (Indiana statewide rule), quoted and re-checked
  18. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  19. Environmental Public Health: 410 IAC 6-71 Campgrounds (Indiana statewide rule), quoted and re-checked
  20. Farmland value per acre (USDA census): Bolthole Index county data
  21. Effective property tax rate: Bolthole Index county data
  22. Median property tax bill: Bolthole Index county data
  23. Posey County Highway Department (poseycountyin.gov)
  24. INDOT Driveway Permit Guide 2024 (Indiana statewide rule), quoted and re-checked
  25. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
  26. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked

Written September 27, 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.

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County locator

Posey County in Indiana

61
County map
Posey County highlighted among the Indiana counties · colored by Index score

How Posey County scores

Seclusion35100% ev.
Self-Sufficiency65100% ev.
Admin Boringness4390% ev.
Durability61100% ev.
Property Autonomy71100% ev.
Carry Cost75100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$242kTypical home
0.6%Property tax
$7,200Land / acre
47.3"Annual rain
3.1% of yrsSevere drought
10.2 / yr (+9.3)Mid-century 100°F days
15.5 daysMid-century dry spell
2.12" (+6.9%)Mid-century 1-day rain
1.84×Wildfire change factor
100%Forward climate coverage
$1,642Home insurance / yr
1.4% / yrInsurance growth
0.71%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
122,972People within 30 min
1,780,350People within 2 hr
85,344Radius comparison (15 mi)
61.2People / sq mi
1.9%Federal land
93.3%Land at 15% slope or less
28.6%Septic soil without severe limits
72,498 acWorkable land screen
20.3%Wooded land
58.4 tonsBiomass / forest ac
56.8°FAvg temp

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Answers from the rulebook for Posey County

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

Posey County rules

  • InspectionsRequired

    Residential and commercial structures built or remodeled in Posey County outside the city limits of Mt. Vernon, New Harmony, Poseyville, and Griffin.

    • The county building department lists required inspections including soil and footings, foundation wall, underground electrical and plumbing, concrete slab, rough plumbing, rough-in electrical and mechanical, rough framing, insulation and caulking, and final inspection.
    • The cited county inspection responsibility excludes the listed city limits.
    “The Building Department is responsible for the inspection of all residential and commercial structures built or remodeled within Posey County (except the cities of Mt. Vernon, Poseyville, New Harmony, and Griffin.)”
  • Certificate of occupancyRequired

    Occupancy of residential and commercial buildings administered by the Posey County Building Department.

    • A final inspection must occur after finish grading and when the building is complete and ready for occupancy.
    • The page states the requirement applies to both residential and commercial buildings.
    “A FINAL INSPECTION AND CERTIFICATE OF OCCUPANCY IS REQUIRED PRIOR TO OCCUPANCY. YOU CANNOT MOVE IN WITHOUT ONE — THAT INCLUDES BOTH RESIDENTIAL AND COMMERCIAL.”
  • Who permits septicCounty

    County septic and sewer permits in Posey County.

    • The county building page identifies the County Health Department as the office from which county septic/sewer permits are obtained.
    “Septic/ Sewer Permits from the County is obtained from the Health Department.”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural buildings on farms in Posey County that meet the county fee-schedule definition.

    • The agricultural building must be located on a farm of not less than fifty acres.
    • It must be primarily used for an agricultural purpose, including raising livestock, storing livestock products, storing agricultural products, or storing farm equipment or machinery.
    • All proper permits must still be obtained; the exemption is from fees, not from permits.
    • The fee schedule also defines churches separately and includes them in the fee exemption.

    minimum farm size: >= 50 acres

    “AGRICULTURAL BUILDING: A building which will be located on a farm of not LESS THAN FIFTY (50) ACRES, primarily used for an agricultural purpose, including but not limited to the raising of livestock, storing of livestock products, storing of agricultural products, or the storing of farm equipment or machinery. [...] While all proper permits must be obtained for the construction of Agricultural Buildings and Churches, as previously defined, said buildings shall be EXEMPT from ANY FEE set out in this “Schedule of Fees.””
  • Permit feesPublished

    Posey County Building Commissioner fee schedule for county-administered construction work.

    • Reinspection fees may be $25 when an inspection is called for and is not ready; if unpaid in 30 days, the fee is doubled after referral to the prosecutor.
    • Large special projects requiring on-site inspectors have expenses included in a site permit and determined by the Building Commissioner; stated maximums do not apply.
    • Agricultural buildings and churches meeting the schedule definitions remain subject to permits but are exempt from fees.

    reinspection fee: 25 USD (May be billed when an inspection is called for and is not ready; doubled if unpaid in 30 days after prosecutor referral.) · other construction fee: per 6 USD per $1,000 (Maximum of $25,000 for listed categories, except special projects.)

    “When an inspection is called for, and IS NOT ready, the person who bought the permit MAY BE sent a bill for $25.00. IF NOT PAID IN 30 DAYS, it will be turned over to the prosecutor; at this time, the fee will be DOUBLED.”
  • Permit processPartial

    County building permit application and inspection process in Posey County outside the listed city limits.

    • Before a building permit application is issued, the applicant may need an Improvement Location Permit from the Area Plan Commission, unless the improvement does not change the present building footprint.
    • Applications must be completed fully and accurately.
    • The county page lists a site plan, construction plans, and state release if applicable.
    • Inspections should be scheduled at least 24 hours in advance when possible and require the site address, owner name, specific work, and permit number if available.
    “Before a building permit application is issued, you may need to provide some or all of the information below. First stop is the Area Plan Commission to acquire an Improvement Location Permit. If you are doing improvements without changing your present foot print of the building, the Improvement Location Permit is not necessary. (Check with the Area Plan Commission.) Application forms must be filled out completely and to the best of the applicant’s knowledge.”
  • County-wide zoningPresent

    The Posey County Area Plan Commission exercises planning and zoning powers for the unincorporated area of the county and administers a consolidated zoning ordinance.

    Posey County Area Plan Commission ↗Scouted from the county site, not yet independently re-checked

Indiana rules that apply here

  • Building permitLimited

    Building-permit or plan-review requirements for construction in Indiana; the state describes these as administrative provisions local jurisdictions may adopt and enforce.

    • Whether a building permit or plan review is required depends on the applicable local jurisdiction's administrative ordinance or process.
    • The cited IDHS statement says local jurisdictions retain authority to establish departments, create inspection schedules, establish fines, and create an order-review process.
    • IDHS states its summary represents the agency's position and is not binding; initial determinations about enforceability of a specific ordinance are left to the local unit administering it.
    “However, HEA 1575 did not eliminate the authority of local jurisdictions to adopt and enforce administrative provisions in building and fire safety ordinances, which include, among other things: (1) the establishment of departments; (2) the requirement to obtain a building permit or plan review; (3) the creation of inspection schedules; (4) the establishment of fines; or (5) the creation of an order review process.”
  • Building code adoptedAdopted (with conditions)

    Statewide Indiana construction subject to the Indiana Fire Prevention and Building Safety Commission's adopted building codes, including the Indiana Building Code and Indiana Residential Code.

    • The adopted codes consist of model codes amended for Indiana.
    • The 2014 Indiana Building Code under 675 IAC 13-2.6 is currently in effect and became effective December 1, 2014.
    • The 2020 Indiana Residential Code under 675 IAC 14-4.4 is currently in effect and became effective December 26, 2019.
    • Specific applicability depends on the structure and code category.

    Indiana Building Code effective date: 2014-12-01 · Indiana Residential Code effective date: 2019-12-26

    “The Fire Prevention and Building Safety Commission creates Indiana codes by adopting model codes and amending them to apply in Indiana.”
    One more reviewed finding on this topic
    • Adopted — Indiana one- and two-family residential construction, including applicable Posey County projects.
      “675 IAC 14-4.4 | 2020 Indiana Residential Code | 2018 International Residential Code for One- and Two-Family Dwellings, First Printing | Currently in Effect Effective: 12/26/2019”
  • Off-grid sanitationLimited

    Residential sanitation in Indiana where a dwelling is not connected, or cannot be connected, to a sanitary sewerage system.

    • The dwelling must be provided with a compliant residential on-site sewage system including a septic tank and a soil absorption system that has not failed.
    • A temporary sewage holding tank is subject to written Indiana Department of Health approval, with specified exceptions for failed systems, soil conditions after a construction permit, and certain district, utility, or municipal sewage plans.
    • A holding tank operated as a primary residential disposal method for a sewer connection plan is limited to not more than one year unless the period is extended upon documentation of satisfactory operation.
    • Drywells and cesspools are not allowed for construction or use as on-site sewage treatment in Indiana.

    holding-tank sewer-connection period: <= 1 year (may be extended upon documentation of satisfactory operation)

    “septic tank and a soil absorption system”
  • Well permitLimited

    Construction of residential water-supply wells and installation of well pumps in Indiana.

    • Indiana Department of Health standards state that several local health departments require a permit before residential water-supply well construction or well-pump installation.
    • The cited statewide source does not identify which local health departments require permits; local requirements must therefore be checked for the specific property.
    • Water-well drillers must be licensed by the Indiana Department of Natural Resources.
    “Several local health departments now require that a permit be obtained before construction of a residential water supply well or installation of a well pump.”
  • Subdividing landRegulated (with conditions)

    Subdivision of lots or lands outside the corporate boundaries of a municipality in Indiana.

    • A correct plat must be recorded with the county recorder before selling lots.
    • The plat must show public places, public ways, and the length, width, and size of each lot.
    • A registered land surveyor must certify the correctness of the plat.
    • The subdivision plat must be submitted for approval by the board of county commissioners.
    • The county recorder may record the plat only if a certificate showing approval of the county commissioners is attached.
    • Once a subdivision-control ordinance is adopted and filed, the plan commission has exclusive control over approval of plats and replats covered by that ordinance.
    • The cited state summary distinguishes subdivisions outside municipalities; incorporated municipalities may have separate statutory or local procedures.
    “Subdivisions Outside Cities and Towns: A person who lays out a subdivision of lots or lands outside the corporate boundaries of any municipality shall record a correct plat of the subdivision in the office of the recorder of the county before selling any lots in the subdivision. The plat must show public places, public ways, and the length, width, and size of each lot.”
  • Driveway accessRequired

    Driveway connections and construction inside the right-of-way of Indiana state highways.

    • The governmental unit having jurisdiction over the street or highway must grant permission.
    • INDOT jurisdiction is limited to the Indiana state highway system; other governmental units may use the guide as a guideline.
    • Applications must be made through the INDOT Electronic Permit System.
    “State law requires the public to obtain permission from the governmental unit having jurisdiction over a street or highway”
  • Building in a floodplainLimited

    Development activities within the fringe portion of Indiana floodplains.

    • There is no state review or state permit for fringe development.
    • When a community adopts floodplain regulations, the regulations must be approved by the Department and may not be less restrictive than 312 IAC 10.
    • Most Indiana communities participate in the NFIP, which requires certain federal regulations to be adopted and enforced for the entire floodplain.
    • Local permits may still be required.
    “There is no State review of or permit issued for development activities within the fringe portion of the floodplain.”
    One more reviewed finding on this topic
    • Required — Most development activities in Indiana floodways, including fills, excavations, bridges, utilities, and non-residential structures.
      “The DNR Division of Water has jurisdiction in Indiana's floodways for most development activities.”
  • Campground & park staysLimited

    Recreational vehicle occupancy at a regulated Indiana campground campsite, rather than residential occupancy on an individually deeded lot or other land outside the rule's campground definition.

    • A campground is an area where campsites are leased or rented and provisions are made for ten or more tents, recreational vehicles, park models, or vacation mobile homes.
    • The campground must be established, operated, and maintained for recreational, health, education, sectarian, business, or tourist activities away from established residences.
    • The rule excludes primitive campgrounds, youth camps, and tracts of land divided into individually deeded lots.
    • No more than one recreational vehicle or one vacation mobile home may be allowed on a designated campsite at the same time.
    • Campground construction, additions, or significant construction changes require plans submitted at least ninety days before construction for department review and approval; the plans must be certified by a registered engineer or architect licensed in Indiana.
    • The rule does not establish a general statewide authorization for long-term residential RV occupancy outside regulated campgrounds.

    minimum campground provisions: >= 10 tents, recreational vehicles, park models, or vacation mobile homes · maximum recreational vehicles per designated campsite: 1 vehicle (one vacation mobile home may be used instead) · advance plan-submission period: >= 90 days (the department may waive plan review for a minor alteration)

    “No more than one (1) recreational vehicle or one (1) vacation mobile home”
    One more reviewed finding on this topic

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemption from Posey County building permit or inspection requirements.
  • Local zoning — Local zoning across Posey County, including unincorporated and incorporated areas.
  • Zoning districts — Published zoning-district map or schedule for Posey County.
  • Minimum dwelling size — Minimum dwelling size in Posey County.
  • Minimum lot size — Minimum lot size in Posey County.
11 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic inspection
  • Mandatory utility hookup
  • Short-term rentals

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 Posey County, Indiana

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

Posey County scores 61/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and a stronger property-autonomy legal backdrop. Watch-outs: about 122,972 people within a 30-minute drive.

Do you need a building permit in Posey County, Indiana?

Posey County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Posey County Health Department. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Posey County, Indiana?

Land in Posey County runs about $7,200 per acre, based on the latest county data.

What is the water situation in Posey County?

Posey County gets about 47.3" of rain a year, with severe drought in roughly 3.1% of years.

How remote is Posey County?

A representative private-land location has about 122,972 people within a 30-minute drive and 1,780,350 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.

Off-grid gear

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

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How Posey compares in Indiana

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