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

Unincorporated Franklin County requires a building permit before a home is erected, moved, expanded, or structurally altered¹. The county also lists decks, in-ground pools, commercial buildings, storage buildings larger than 200 square feet, and renovations beyond cosmetic work as requiring building permits⁴. Kentucky residential-code standards apply even though the state leaves single-family permit requirements to local ordinance⁷. Submit the application and two plan sets to Planning & Zoning; building permits are not issued by email or online⁴. The published fee schedule lists $25 for residential plan review and $0.15 per square foot for one/two-family construction, with a $250 minimum per unit⁸. Qualifying farmstead construction may be exempt from building permits and inspections².

Franklin County's Building Division, within Planning & Zoning, monitors permitted construction for code and ordinance compliance⁴. Visit 321 West Main Street in Frankfort or call (502) 875-8751⁴. County building inspections occur at stages of permitted work; keep construction accessible and exposed until approval, and schedule by telephone rather than email or phone message⁴. The department also issues zoning permits for fences, storage buildings of 120 square feet or less, above-ground pools, retaining walls under 4 feet, and private-property driveways or sidewalks⁹. Before occupying a regulated new, moved, converted, enlarged, or changed structure or premises, obtain the Building Inspector's certificate of occupancy unless an ordinance exception applies¹.

The county zoning rules below apply to unincorporated Franklin County; municipal jurisdiction must be checked separately¹⁰. The county publishes zoning districts with different uses, lot requirements, setbacks, and heights, so ask Planning & Zoning for the parcel’s district before laying out buildings^1,11. Agricultural buildings on land used solely for qualifying agriculture are exempt from ordinary building-permit, occupancy-certificate, height, yard, and location requirements, but road-protection setbacks and floodplain regulation can still apply¹¹. Separately, a homeowner may request a farmstead exemption from building permits and inspections for a home or agricultural structure on a farm of at least 10 acres; the application fee is $50². The farmstead exemption excludes commercial operations and leaves zoning, septic, plumbing, electrical, and floodplain requirements in place². Land division requires subdivision approval and recorded plats, with an exception for qualifying agricultural-use divisions that involve no new street¹².

For Franklin County properties outside Frankfort municipal sewer service, begin with the Franklin County Health Department’s septic site evaluation; construction served by private septic needs a passing evaluation^3,13. Obtain the septic construction permit before any part of the system is constructed, installed, or altered; the application requires drawings, specifications, and fees, and the permit expires after one year unless extended¹⁴. Installed, altered, or repaired systems require a certified inspector’s inspection before backfilling¹⁵. The Health Department lists $250 for a site evaluation, $270 for a new-installation permit, $250 for an existing-system inspection, and $270 for a repair permit³. The existing-system fee does not establish a universal inspection requirement³. Only 6.3% of county soils are rated “not limited” for conventional drain fields; obtain a site evaluation before buying, because a low rating does not mean septic is impossible¹⁶.

We could not confirm a general Franklin County rule for residential RV occupancy or tiny homes; ask Planning & Zoning about the proposed use and duration⁹. In mapped A, A1-30, AO, AH, or AE flood-hazard areas, an RV must stay fewer than 180 consecutive days, be fully licensed and ready for highway use, or meet new-construction permit requirements, including manufactured-home anchoring and elevation requirements¹¹. Franklin County’s “qualified manufactured home” definition requires at least 900 square feet of total living area, a permanent foundation, appropriate utility connections, and additional age, width or height, and installation conditions⁵. That definition does not establish a minimum size for every dwelling; we could not confirm a general dwelling-size rule, so ask Planning & Zoning which category fits the proposed home^5,9. Mobile homes used as single-family residences are listed in the Rural Residential district, subject to applicable requirements¹¹.

1. Ask Planning & Zoning for the parcel’s jurisdiction, zoning district, setbacks, height limit, and subdivision requirements; resolve any farmstead exemption before applying for a building permit^1,2,10,12.
2. Where municipal sewer is unavailable, obtain the Health Department site evaluation, then the septic construction permit before system work begins^13,14.
3. Resolve access: a state-highway driveway requires written application to the District Engineer; ask the county Road Department about county-road drainage and culverts^17,18.
4. Submit the building application and two scaled plan sets showing lot dimensions, structures, building lines, height, and intended use to Planning & Zoning^1,4.
5. Obtain the state plumbing permit before plumbing construction or alteration¹⁹.
6. Schedule building inspections, keep work exposed until approved, and obtain the required certificate of occupancy before use^1,4.

Floodplain: outside incorporated-city jurisdiction, the county’s flood-repair guidance requires both state approval and a local Stream Construction Permit from Planning & Zoning; repairs equaling or exceeding 50% of market value use the state General Flood Permit, while lesser repairs use the Non-Substantial Permit²⁰. Floodplain permits remain applicable to qualifying farmsteads². Water: Kentucky requires no well-permit application or fee from the property owner, but a certified driller must construct or abandon the well⁶. Rural subdivisions and development plans require public potable water or a properly permitted private well¹². Access: regulated subdivision and development-plan driveways must meet county access standards¹². Taxes: the effective property tax rate is about 0.8%, with a median annual bill near $1,672¹⁶.