Unincorporated Jessamine County, Kentucky requires a residential building permit before construction begins1. The Jessamine County-City of Wilmore Joint Planning Department handles the county permit, while the Jessamine County Health Department evaluates sites and issues septic permits23. Zoning applies, but county and City of Wilmore rules are separate, so confirm the parcel's district before designing45.
At a glance
- Building permit
- Required before residential construction in unincorporated Jessamine County1
- Zoning
- Yes; confirm whether county or City of Wilmore rules govern the parcel45
- New-home permit fee
- $930 plus $0.05 per square foot6
- Septic permit
- Jessamine County Health Department; site evaluation first, then a $320 permit37
- Septic soil suitability
- Only about 3% of county soils rate free of severe limits for a conventional drain field8
- Small accessory structures
- Under 200 square feet uses the Zoning Permit Application1
- Floodplain work
- A local floodplain permit is mandatory; a state permit is also required910
Who to call
Building permits
Jessamine County-City of Wilmore Joint Planning Department
Residential and commercial building permits, zoning permits, manufactured home site placement, flood plain and grading permits, and zoning/subdivision applications for unincorporated Jessamine County and the City of Wilmore
121 South Main Street, Nicholasville, KY 40356
Septic permits
Jessamine County Health Department
On-site sewage disposal (septic) permits, site evaluations, and inspections for Jessamine County
210 East Walnut Street, Nicholasville, KY 40356
Roads & driveways
Jessamine County Road & Fleet Department
Maintenance of county roads and bridges; issues Right-to-Work permits for road work such as utility or mowing work in the county right-of-way
275 Park Drive, Nicholasville, KY 40356
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Jessamine County, Kentucky?
Yes. Residential construction in unincorporated Jessamine County requires approval and a permit before work starts1. Structures under 200 square feet use the Zoning Permit Application instead of the residential building-permit application1. The published fee for a new single-family dwelling is $930 plus $0.05 per square foot; an addition or remodel is $130 plus $0.05 per square foot6. An accessory structure under 400 square feet is $55, while one over 400 square feet is $130 plus $0.05 per square foot6. Permits normally take 7–10 business days, and starting construction early can bring a fine of three times the permit amount plus a stop-work order11.
Who is the Jessamine County building department, and how do you reach them?
The Jessamine County-City of Wilmore Joint Planning Department is at 121 South Main Street, Nicholasville, KY 40356, phone (859) 885-64152. The office provides residential and commercial building applications, zoning permits, manufactured-home site placement applications, floodplain permits and grading permits2. Send inspection requests to [email protected]2. For a residential application, assemble completed fields, plans, a site plan and either septic-evaluation or sewer-tap documentation11. New construction must provide a sewer tap or septic approval; the published rule requires one of those alternatives, not both12.
Does Jessamine County have zoning?
Jessamine County has zoning, but the answer is parcel-specific because the published materials distinguish the Jessamine County Code, the City of Wilmore Code and joint zoning and subdivision regulations4. Official zoning maps are divided into an index, county quadrants and Wilmore, so identify the parcel on the map before relying on a use or dimensional rule5. The reviewed materials do not confirm universal setback, minimum-lot-size, minimum-home-size, lot-coverage or height numbers. Ask the Joint Planning Department which jurisdiction and zoning district control the parcel, then request the applicable standards before preparing a site plan2.
How do septic permits work in Jessamine County?
The Jessamine County Health Department handles local septic permits at 210 East Walnut Street, Nicholasville, KY 40356, phone (859) 885-4149133. Start with a site evaluation by a certified inspector, who determines whether the site and soil can support onsite wastewater treatment14. The septic permit must be issued before the plumbing permit, and the installer must later provide a system drawing showing component locations, modifications and grade shots on lateral lines7. The current published permit fee is $320; the Health Department office page separately lists a $225 site-evaluation fee713. Only about 3% of county soils rate free of severe limits for a conventional drain field, so complete the evaluation before committing to a house location or system budget8.
Can you live in an RV or tiny home on your land in Jessamine County?
We could not confirm a Jessamine County rule that allows or prohibits long-term RV occupancy or tiny-home occupancy on private land. Kentucky's rule allowing brief sleep in a lawfully parked vehicle on a public road or parking lot does not answer residential use on private property15. Because zoning rules differ between county and Wilmore materials, ask the Joint Planning Department which jurisdiction and district apply and whether the proposed unit is a permitted dwelling, temporary use or conditional use42. A manufactured home follows a distinct application path through the department, but that application does not by itself establish that every parcel allows manufactured-home occupancy2.
Building a home in Jessamine County: the steps, in order
- Ask the Joint Planning Department to identify the parcel's jurisdiction and zoning district45.
- Obtain a septic site evaluation and approval from the Health Department, or obtain sewer-tap documentation for a served site1412.
- Prepare the residential application, plans and site plan; structures under 200 square feet use the Zoning Permit Application111.
- Attach an encroachment permit if the entrance is on a state road16.
- Obtain both state and local permits for floodplain development; Jessamine County requires its floodplain permit for any floodplain work109.
- Submit the complete application and allow the normal 7–10-business-day processing period before construction11.
- Obtain the separate plumbing permit before plumbing work; a homeowner may pull that permit for the homeowner's personal residence17.
What to check before you buy land in Jessamine County
Only about 3% of Jessamine County soils rate free of severe limits for a conventional drain field, so make the Health Department's site evaluation an early purchase contingency814. Confirm whether public sewer is actually available; the building application accepts either a sewer tap or septic approval but does not identify a serving utility12. Check the official zoning map and controlling jurisdiction before relying on an advertised use, setback or dwelling type45. Determine whether the building area lies in a floodplain, because any work there needs a county floodplain permit as well as the state permit910. For a state-road entrance, plan on an attached encroachment permit16. For a county-road entrance, ask Road & Fleet whether the proposed work needs its right-of-way permit; the office confirms such permits for utility or mowing work but does not specifically answer new driveways18.
Watch-outs
- Do not start construction while the permit is pending: early work can trigger a fine of three times the permit amount and a stop-work order11.
- We could not confirm residential RV or tiny-home rules, minimum dwelling size or parcel-specific setbacks; ask the Joint Planning Department for the standards tied to the parcel's jurisdiction and zoning district42.
- Only about 3% of county soils rate free of severe limits for a conventional drain field, so obtain the certified site evaluation before fixing the house location or septic budget814.
Sources
- Building Permit Application - Residential, quoted and re-checked
- Jessamine County-City of Wilmore Joint Planning Department (jessamineky.gov)
- Septic Systems, quoted and re-checked
- Ordinances, Plans, and Maps, quoted and re-checked
- Ordinances, Plans, and Maps, quoted and re-checked
- Building Permit Application - Residential, quoted and re-checked
- Septic Systems, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Building Permit Application - Residential, quoted and re-checked
- Find Your Flood Zone (Kentucky statewide rule), quoted and re-checked
- Building Permit Application - Residential, quoted and re-checked
- Building Permit Application - Residential, quoted and re-checked
- Jessamine County Health Department (jessaminehealth.org)
- Septic Systems, quoted and re-checked
- KRS 511.110 — Unlawful camping (Kentucky statewide rule), quoted and re-checked
- Building Permit Application - Residential, quoted and re-checked
- Division of Plumbing Fee Change and Permit Information (Kentucky statewide rule), quoted and re-checked
- Jessamine County Road & Fleet Department (jessamineky.gov)
Written September 29, 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.