Oldham County, Kentucky requires a building permit when a building is constructed1. The county enforces state and local building and electrical codes2, while Planning & Development Services administers countywide zoning3. New onsite sewage systems require a county Health Department permit and a proposed-system drawing4.
At a glance
- Building permit
- Required when a building is constructed in Oldham County1
- Zoning
- Yes, countywide, administered by Oldham County Planning & Development Services3
- Septic permits
- Required through the Oldham County Health Department; submit a proposed-system drawing4
- Owner-builder exemption
- Unconfirmed; no explicit owner-builder building-permit exemption found on the county's own pages5
- RV living on your own land
- State law only protects sleeping in a vehicle under 12 hours; it does not authorize long-term RV living on private land6
- Plumbing permit fee (residential)
- $50 base fee plus $14 per opening, from the state Division of Plumbing7
- Floodplain development
- May require both state and Oldham County floodplain permits8
Who to call
Building permits
Oldham County Buildings & Inspections Office
Building, electrical, and fire detection/suppression permits and inspections for Oldham County; plumbing and HVAC permits go through the state, and septic through the county health department
100 West Jefferson Street, La Grange, KY 40031
Zoning
Oldham County Planning & Development Services
Zoning administration, the Board of Adjustments, the Planning Commission, subdivision regulations and the county's Comprehensive Zoning Ordinance
100 West Jefferson Street, La Grange, KY 40031
Septic permits
Oldham County Health Department, Environmental Division
On-site sewage disposal (septic) permits for Oldham County under 902 KAR 10:085
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 Oldham County, Kentucky?
Yes. Oldham County requires a building-permit application when a building is constructed1. The Oldham County Buildings & Inspections Office enforces state and locally mandated building and electrical codes and reviews new construction and electrical work for compliance2. Kentucky's residential code does not itself require a permit for a single-family dwelling unless a local ordinance requires one9, while Kentucky law authorizes a county fiscal court to adopt construction regulations and a county permit system10. Oldham County has adopted local enforcement, so a rural parcel outside a city is not a permit-free building site. Ask the Buildings & Inspections Office which applications and trade permits your particular project needs before work begins11.
Who issues building permits and how do you reach them in Oldham County?
The Oldham County Buildings & Inspections Office, housed in the Fiscal Court Building at 100 West Jefferson Street in La Grange, enforces the state and county-mandated building and electrical codes and reviews new construction and electrical work for compliance11. Permit and application questions can be emailed to the office, and applications may be submitted electronically except residential swimming pool applications, which must be submitted in person11. The Buildings & Inspections Office does not issue plumbing, septic or HVAC permits: plumbing and HVAC permits go through the state's own online portal at the Kentucky Department of Housing, Buildings and Construction, and septic permits go through the Oldham County Health Department1112. Zoning questions, subdivision applications and Board of Adjustments matters instead go to the separate Oldham County Planning & Development Services office, in the same Fiscal Court Building13.
Does Oldham County have zoning?
Yes. All of Oldham County, Kentucky is assigned to a district on the county's official zoning maps14. Oldham County Planning & Development Services administers zoning, the Board of Adjustments, the Planning Commission and subdivision regulations313. The zoning district matters before you choose a house plan or assume an RV, tiny home, setback or minimum home size will be acceptable; the reviewed sources did not establish those parcel-level rules, so ask Planning & Development Services about the specific parcel. A landowner or developer generally starts a development or subdivision with Planning & Development, then submits construction plans and calculations to the County Engineer after the required Planning Commission or legislative approval15. Kentucky also requires planning-commission approval of a subdivision plat before recording, although a division for agricultural use that creates no new street is excluded from the state's subdivision definition1617.
How do septic permits work in Oldham County?
Obtain the onsite-sewage permit form from the Oldham County Health Department and submit a drawing of the proposed septic system for permit issuance4. Kentucky's statewide onsite-sewage program is administered through local health departments, and a construction permit is required before a system is built, installed or altered1819. A certified inspector must inspect a system that is installed, constructed, altered or repaired before it is backfilled20. If public sewer is unavailable, Kentucky's plumbing code requires the house drain to connect to an approved private sewage-disposal system21. Only about 21.5% of Oldham County soils are rated without severe limitations for a conventional septic drain field, so make the site evaluation an early purchase contingency rather than assuming a conventional layout will work22.
Can you live in an RV or tiny home on your land in Oldham County?
Kentucky's only statewide protection for sleeping in a vehicle is narrow: it protects someone sleeping temporarily in a vehicle parked lawfully on a public road, street or parking lot for less than 12 hours, and it does not authorize long-term or permanent RV living on private land6. Whether you can live in an RV or tiny home on your own Oldham County land instead depends on the county's own zoning and code enforcement, since Oldham County has both countywide zoning and its own building-permit ordinance313. Ask Planning & Development Services directly about RV and tiny-home occupancy in the zoning district your parcel is in before you plan around either one.
Building a home in Oldham County: the steps, in order
- Confirm the parcel's zoning district and any subdivision review with Oldham County Planning & Development Services before design work1315.
- Arrange the septic site evaluation early, because only about 21.5% of county soils are rated without severe limitations for a conventional drain field22.
- Obtain the Health Department septic form and prepare the proposed-system drawing before construction4.
- Apply through Oldham County Buildings & Inspections when the project includes construction of a building111.
- Obtain plumbing and HVAC permits from the responsible state offices because the county building office does not issue them11.
- Apply in writing to the state District Engineer before adding a driveway approach onto a state highway23.
- For development in a flood hazard area, obtain the applicable state permit and the separate Oldham County permit8.
- For a development or subdivision, submit approved construction plans and calculations to the County Engineer; a complete submission enters review, for which the county states a general target of about 4 weeks1524.
What to check before you buy land in Oldham County
Soils are the main septic constraint: only about 21.5% of the county's soils are rated free of severe limits for a conventional drain field, so budget for a site evaluation before you commit22. Terrain is otherwise favorable, with about 77.5% of land at 15% slope or less and 53% wooded2526. The county gets about 51.4 inches of precipitation a year and sits in severe drought in only about 1.6% of years2728. Oldham County sits close to a major metro area, with the nearest city of 100,000 or more people about 19 miles away in straight-line distance29. It is also one of the pricier rural counties in this dataset: typical home values run around $452,848 and farmland averages about $8,262 an acre3031. Property taxes run comparatively low, with an effective rate near 0.9% and a median annual bill around $3,454, while typical homeowners insurance runs about $1,886 a year323334. If you plan any water-well work, note that Kentucky requires the person doing the drilling, altering, repairing or abandoning of a well to hold a state water-well driller certificate, which is a driller credential rather than a separate homeowner permit35.
Watch-outs
- Oldham County's Buildings & Inspections Office does not issue plumbing, septic or HVAC permits — those go through the state Division of Plumbing/Department of Housing, Buildings and Construction, and the county Health Department, respectively11.
- No explicit owner-builder exemption from the building-permit requirement was found on Oldham County's own pages, so do not assume one exists without asking the Buildings & Inspections Office directly5.
- Development in a mapped floodplain needs both a state and a local floodplain permit, not just one or the other36.
Sources
- Construction Permits & Inspections, quoted and re-checked
- Buildings & Inspections, quoted and re-checked
- Oldham County - Planning & Development Services (2026 county census)
- Onsite Sewage, quoted and re-checked
- (2026 county census)
- KRS 511.110 — Unlawful camping (Kentucky statewide rule), quoted and re-checked
- Division of Plumbing Fee Change and Permit Information (Kentucky statewide rule), quoted and re-checked
- Floodplain Administrator, quoted and re-checked
- 815 KAR 7:125, Kentucky Residential Code (Kentucky statewide rule), quoted and re-checked
- KRS 67.380 — Authority of fiscal court to regulate construction of buildings (Kentucky statewide rule), quoted and re-checked
- Oldham County Buildings & Inspections Office (oldhamcountyky.gov)
- Oldham County Health Department, Environmental Division (oldhamcountyhealthdepartment.org)
- Oldham County Planning & Development Services (oldhamcountyky.gov)
- Planning & Development Services, quoted and re-checked
- Construction Permits & Inspections, quoted and re-checked
- KRS 100.277 — Commission approval required for subdivisions (Kentucky statewide rule), quoted and re-checked
- KRS 100.111 — Definitions for chapter (Kentucky statewide rule), quoted and re-checked
- Onsite Sewage Disposal Systems Program (Kentucky statewide rule), quoted and re-checked
- 902 KAR 10:110. Issuance of on-site sewage disposal system permits (Kentucky statewide rule), quoted and re-checked
- 902 KAR 10:085. System Installation Inspection (Kentucky statewide rule), quoted and re-checked
- 815 KAR 20:130. House sewers and storm water piping; methods of installation (Kentucky statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- 603 KAR 1:020 Driveway approaches, entrances; construction and maintenance (Kentucky statewide rule), quoted and re-checked
- Construction Permits & Inspections, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Farmland value per acre (USDA census): Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
- 401 KAR 6:320. Certification of water well drillers and water well driller assistants (Kentucky statewide rule), quoted and re-checked
- Find Your Flood Zone (Kentucky 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.