Indiana
Buying Land in Posey County, Indiana
Seat Mount Vernon, Indiana's southwesternmost county, bordered by both the Ohio and Wabash Rivers. Posey County zones through a joint Area Plan Commission covering the county and three of its towns, and has spent since March 2024 under a moratorium on new commercial solar and wind projects after real farmland-protection pushback.
Zoning: one Area Plan Commission covers the county and three towns
Posey County is zoned through a genuine joint arrangement: the Posey County Area Plan Commission exercises planning and zoning authority not just for unincorporated county land, but jointly for the City of Mount Vernon and the Towns of Cynthiana and Poseyville as well. That's the kind of combined city-county "area plan commission" structure Indiana's IC 36-7-4 allows but that not every Indiana county uses -- and it means a single Commission, based at 126 E Third Street in Mount Vernon, handles zoning questions across most of the county's incorporated and unincorporated territory alike, rather than each town running an entirely separate zoning office.
The Commission's Consolidated Zoning Ordinance covers Mount Vernon, Cynthiana, Poseyville, and unincorporated Posey County together, alongside a separate Subdivision Ordinance and the county's own Solar and Wind Ordinance discussed below. A comprehensive plan update was completed in 2024. Even with one Commission covering this much territory, confirm the specific zoning district and any applicable overlay (including the solar/wind provisions) for your exact parcel directly, since districts and permitted uses still vary within the Commission's combined jurisdiction.
A real, sustained fight over commercial solar and wind on farmland
Posey County's most distinctive current land-use story is its commercial solar and wind fight. The county adopted a Solar and Wind Ordinance for unincorporated territory setting real, specific rules -- panels set back at least 300 feet from a home's foundation or 100 feet from a property line (whichever is greater), a 6-foot vegetative tree buffer between panels and neighboring properties, and a ban on industrial solar within 500 feet of a school. But adopting the ordinance didn't end the fight: organized local opposition to proposed solar farms, including a project from developer Arevon that county officials said they would not allow on prime farmland ("We do not want the prime farm ground to be taken," as officials were quoted), led the county to impose a moratorium on new commercial solar and wind projects starting in March 2024, which reporting indicates has since been extended at least into December 2026.
For a buyer, that combination matters two different ways depending on your goal. If you're hoping to lease land for a future utility-scale solar or wind project, the county's current posture is genuinely restrictive right now -- an active moratorium, not just an ordinary permitting process, stands between a proposal and approval, and farmland-protection sentiment among county officials has been explicit and public. If you're buying land specifically because you want distance from that kind of industrial development, Posey County's moratorium and its farmland-protection stance are also worth knowing, since they signal the county's current direction even though moratoriums are, by nature, temporary. Our dedicated wind-solar-leasing page for Posey County covers the ordinance's specific terms and the moratorium's status in more depth.
Septic, industrial neighbors, and New Harmony
For a standard septic system, the Posey County Health Department (126 E 3rd St, Mount Vernon; Environmentalist/Sanitarian (812) 838-1329) issues permits under statewide ISDH rules, with posted fees of $75 for a new residential system, $100 for industrial, and $50 for a repair permit.
Posey County also has real industrial and infrastructure neighbors worth knowing about depending on where in the county you're looking: the A.B. Brown Generating Station, a four-unit, 700-megawatt power plant, sits on the Ohio River about eight miles east of Mount Vernon, and the Ports of Indiana-Mount Vernon is the state's seventh-largest inland port complex by some measures and its highest-volume port for cargo including grain, coal, fertilizer, and cement -- this is a genuinely different facility from the separate Gibson Generating Station in neighboring Gibson County, and a buyer should be careful not to conflate the two when researching either county. On the other end of the county's character, New Harmony, a nationally significant historic site where two sequential intentional communities (the Rappites, then the Owenites) attempted to build utopian settlements in the early 1800s, remains a genuine, still-operating tourism draw with a historic district, museum, and visitor center -- a real amenity for the area's character even without a distinctive standalone land-use angle attached to it.
Who to Call Before Buying Land in Posey County
Direct WebFetch access to poseycountyin.gov and related domains was blocked by a network egress restriction in this research pass; contact details come from WebSearch-indexed content rather than a full site read, so confirm current hours, fees, and moratorium status directly before relying on this page.
Planning & Zoning
Posey County Area Plan Commission
Zoning verification for Posey County, Mount Vernon, Cynthiana, and Poseyville; current status of the solar/wind moratorium on a specific parcel.
Septic / Onsite Wastewater
Posey County Health Department
Septic permits under 410 IAC 6-8.3.
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Get local guidanceTopics Specific to Posey County
Sources
- Area Plan Commission - Posey County Government — Posey County, Indiana Government (accessed 2026-09)
- The Zoning Ordinance of the City of Mount Vernon (Consolidated) — Posey County, Indiana Government (accessed 2026-09)
- Solar and Wind Ordinance for Unincorporated Posey County — Posey County, Indiana Government (accessed 2026-09)
- Opposition emerges to proposed Posey County solar farms — Eyewitness News (WEHT/WTVW) (accessed 2026-09)
- Posey County Commissioners put year-long pause on renewable energy projects — Eyewitness News (WEHT/WTVW) (accessed 2026-09)
- How an Indiana county got ahead of solar game — Farm Progress (accessed 2026-09)
- A. B. Brown Generating Station — Wikipedia (accessed 2026-09)
- Mount Vernon - Ports of Indiana — Ports of Indiana (accessed 2026-09)
- New Harmony - Visit Posey County — Visit Posey County (accessed 2026-09)
Last reviewed 2026-09