Building permits, zoning and land rules in McLean County, Kentucky

Yes. McLean County requires a building permit under the county zoning ordinance's administration-and-enforcement provisions and provides a building-permit application through the Planning and Zoning Commission¹. Kentucky's residential code otherwise says permits, inspections and certificates of occupancy are not required for a single-family dwelling unless a local ordinance requires them; McLean County's local requirement is therefore the controlling starting point here⁸.

Kentucky uses a mandatory statewide residential code for single-family dwellings, two-family dwellings and townhouses, with Kentucky amendments superseding conflicting provisions of the underlying residential code; the 2018 Kentucky Residential Code, Second Edition, was adopted in 2019⁹. A building permit is not the only approval a project may need: plumbing work requires a plumbing construction permit, and a project in an identified floodplain requires both state and local floodplain permits^5,10.

Start with the McLean County Planning and Zoning Commission for the building-permit application, zoning ordinance and zoning maps; the county page lists the commission at the courthouse and gives its permit contact number¹¹. The application decision should come before construction scheduling because Kentucky's statewide code makes the local ordinance decisive for permits on a single-family dwelling⁸.

Separate technical inspections may involve state or trade inspectors. The county maintains a County Inspectors page covering building, electrical, manufactured-housing, HVAC, plumbing and environmental-health contacts¹². Plumbing construction or alteration requires a Division of Plumbing permit, which may be issued to a licensed master plumber or to a homeowner working on the homeowner's own personal residence⁵. Ask Planning and Zoning which inspections and certificate-of-occupancy steps attach to the exact structure and parcel before hiring trades.

McLean County has adopted zoning administered through its Planning and Zoning Commission². The county publishes zoning maps and directs permit applicants through the Planning and Zoning Commission¹¹. McLean County's official land-use map shows six zoning categories, agricultural, commercial, industrial, residential, residential-1 and residential-2, and separately marks city limits². The map covers the county, not just one town, so the first question for any parcel is which category it falls in and whether it sits inside a city².

Get the parcel's mapped classification before assuming a home, accessory structure or business use is allowed. We could not confirm countywide rules for setbacks, minimum lot size, minimum dwelling size, lot coverage or building height. The same gap applies to a county-specific agricultural exemption from building or zoning rules. Ask Planning and Zoning for the provisions tied to the parcel's district and whether an incorporated city's rules apply at the address. Kentucky law also requires planning-commission approval before land is subdivided within a planning-unit jurisdiction¹³. Kentucky also bars local zoning from excluding a qualified manufactured home, at least 20 feet wide with at least 900 square feet of living area and no more than 5 years old at installation, from a residential zone where single-family houses are allowed¹⁴.

Green River District Health Department serves McLean County for onsite sewage work, including site evaluations and construction permits³. The county's environmental-health contact is listed through the McLean County Health Department¹². Kentucky requires a permit before any portion of an onsite sewage system is constructed, installed or altered, and the permit follows a site evaluation⁴. Every onsite system that is installed, constructed, altered or repaired must be inspected by a certified inspector⁴.

Soil is a serious due-diligence issue here: only about 4.7% of mapped soils are rated without severe limitations for a conventional septic drain field¹⁵. That does not decide whether a particular tract will pass, but it makes an early site evaluation especially valuable before choosing a house location. Where sewer is unavailable, Kentucky plumbing rules require the building drain to connect to an approved private sewage-disposal system¹⁶.

We could not confirm a McLean County rule that allows long-term RV occupancy on private land, so do not treat the absence of a located rule as permission. Ask the McLean County Planning and Zoning Commission whether the parcel's district permits RV occupancy, temporary camping, a tiny home or an accessory dwelling, and what building, sanitation and utility approvals apply¹¹.

Kentucky's rule allowing someone to sleep temporarily in a lawfully parked vehicle on a public road, street or parking lot for less than 12 hours does not authorize long-term RV living on private property¹⁷. A tiny home used as a dwelling still encounters the statewide residential-code framework, while McLean County's specific minimum-size and tiny-home occupancy rules remain unconfirmed⁹. If public sewer is unavailable, a dwelling's drain must connect to an approved private sewage system; this is not permission to use an unreviewed off-grid sanitation method¹⁶.

1. Ask the McLean County Planning and Zoning Commission to identify the parcel's zoning district, allowed residential use and applicable dimensional rules^2,11.
2. Submit the county building-permit application and confirm which building, electrical, HVAC, plumbing and occupancy inspections apply^1,11.
3. Request the onsite sewage site evaluation through the local health department before fixing the house and drain-field locations³.
4. Obtain the septic construction permit before any part of the system is built, then arrange inspection before backfilling⁴.
5. Obtain the plumbing construction permit before plumbing work begins⁵.
6. If the driveway meets a state highway, submit a written driveway application to the Department of Highways district engineer¹⁸.
7. If any development lies in an identified floodplain, secure both state and local floodplain permits before work¹⁰.

Confirm zoning, permitted use and buildability with the McLean County Planning and Zoning Commission before closing^2,11. Make the septic evaluation an early contingency because about 4.7% of mapped soils lack severe conventional-drain-field limitations¹⁵. Check the proposed house, driveway and septic locations against the floodplain; identified floodplain development needs both state and local permits¹⁰.

For water, Kentucky does not require the property owner to obtain a permit or pay a fee to construct or abandon a private well, but the work must be performed by a Kentucky-certified water-well driller⁶. For access onto a state highway, a new farm or single-family driveway requires a written application to the Department of Highways district engineer¹⁸. As a cost baseline rather than a quote for a specific parcel, the county's effective property-tax rate is about 0.7% and the median annual property-tax bill is about $984¹⁵.