Union County, Kentucky does not require a building-code inspection permit for a single-family dwelling, but the Kentucky Residential Code still applies, and residential site plans still go to the county Codes Administrator123. The Joint Planning Commission handles zoning, with mapped districts in Morganfield, Sturgis and Waverly4. Septic permits go through the Green River District Health Department5.
At a glance
- Building permit
- No county building-code inspection permit for a single-family dwelling; covered multi-family, commercial and occupancy-change work goes to state DHBC16
- Electrical permit
- Required for all electrical work in Union County, through the county's certified electrical inspector1
- Zoning
- The county's zoning map covers Morganfield, Sturgis and Waverly city limits; coverage of unincorporated land is unconfirmed74
- Septic
- A local health-department permit is required before construction, installation or alteration; Green River serves Union County58
- Owner-builder exemption
- An owner may do HVAC work on property the owner owns and occupies, subject to permit rules; no general building exemption is confirmed9
- Residential code
- Kentucky's residential code applies even where a single-family permit and inspection program does not102
- Driveway access
- A written application to the state Department of Highways district engineer is required for a new farm or single-family driveway onto a state road11
- Septic-friendly soils
- About 17.9% of the county's soils are rated free of severe limits for a conventional drain field12
Who to call
Planning & zoning
Union County Joint Planning Commission
Administers the county's zoning ordinance, subdivision regulations and comprehensive plan; formed as a joint city-county body under KRS Chapter 100
510 South Mart Street, Morganfield, KY 42437
Building permits
Union County Building Code (Planning Commission page; permits routed to state DHBC)
States which construction requires a building-code inspection permit in Union County, routes those permit applications to the state Department of Housing, Buildings and Construction, and administers local electrical permits
Zoning
Union County Zoning Ordinance & Map (Planning Commission page)
Describes the boundaries and purpose of the county's adopted zoning ordinance and map
Septic permits
Union County Health Center (Green River District Health Department) — Onsite Sewage Program
Local Green River District Health Department office for Union County; administers onsite sewage (septic) site evaluations and permits under Kentucky's statewide program
218 W. McElroy St., Morganfield, KY 42437
Contact details are copied from each office’s official page and were checked against it on October 10, 2026.
Off-grid gear
Going off-grid in Union County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Union County, Kentucky?
It depends what you are building. Union County's building-code page excepts single-family dwellings from its building-code inspection permit requirement, while requiring those permits for new construction and alteration of multi-family dwellings, commercial buildings and changes of occupancy1. Kentucky's statewide rule likewise does not require a permit, inspection or certificate of occupancy for a single-family dwelling unless a local ordinance does6. The permit exception is not a code exemption: Kentucky has adopted building and residential codes that apply according to the project and code jurisdiction2. Electrical permits are required for all electrical work in Union County, and a homeowner may obtain one for a current residence when personally doing the work1. Separately, Union County's site-plan procedure sends residential site plans to the Codes Administrator for review and building permit, so confirm with the Planning Commission whether that step applies to your parcel3.
Who handles construction permits in Union County, and how do you reach them?
For covered multi-family, commercial or change-of-occupancy construction, direct the permit application to the state Department of Housing, Buildings and Construction at (502) 573-03731. Where no local single-family inspection program exists, the builder must still follow the Kentucky Residential Code; state HVAC and local electrical inspections continue even though general building inspections do not10. Union County's site-plan procedure sends residential plans to the Codes Administrator and multi-family or nonresidential plans to a Site Plan Committee13. An owner may perform HVAC work on property the owner owns and occupies, but an initial HVAC system still requires a permit9. For electrical work, contact the county's certified electrical inspector through the Union County Planning Commission1.
Does Union County have zoning?
Union County has an adopted zoning ordinance and map administered by the Union County Joint Planning Commission, a body formed in 1972 through an interlocal agreement between the Union County Fiscal Court and the cities of Morganfield, Sturgis, Uniontown and Waverly, with Uniontown later withdrawing in 1979714. The zoning map itself displays land-use zones and districts within the boundaries of the cities of Morganfield, Sturgis and Waverly, so the confirmed zoning coverage is city-based rather than established as reaching unincorporated county land4. Kentucky law lets a county's legislative body and fiscal court enact permanent zoning once the required comprehensive-plan elements are adopted, and a joint city-county commission like Union County's can exercise that authority within its planning unit, but whether the zoning ordinance's district rules extend past city limits onto unincorporated parcels was not confirmed on the county's own pages, so ask the Planning Commission directly for your specific parcel15. Subdivision of land, by contrast, needs planning-commission approval statewide regardless of zoning district, so any lot split in Union County still runs through this same commission16.
How do septic permits work in Union County?
Kentucky's onsite sewage program is administered through local health departments, and the Green River District Health Department serves Union County5. Reach its Union County Health Center at (270) 389-1230, at 218 W. McElroy St. in Morganfield17. Obtain the local health-department permit before constructing, installing or altering a system; the state permit fee is $50, and the local board of health may add a fee8. A homeowner installing the homeowner's own system must obtain a homeowner permit, and the design must follow the site evaluation18. Every system installed, constructed, altered or repaired must be inspected by a certified inspector, with the installation inspection requested before backfilling19. Local health-department inspectors perform the site evaluations and inspections, and a certified installer must install the system based on the site-evaluation results20. Only about 17.9% of Union County soils are rated free of severe limitations for a conventional drain field, so complete the site evaluation before choosing the house site12.
Can you live in an RV or tiny home on your land in Union County?
We could not confirm a rule allowing long-term RV living on private land in Union County; ask the Union County Joint Planning Commission before relying on an RV as a residence14. Kentucky's vehicle-sleeping rule concerns temporary sleeping for less than 12 hours in a vehicle lawfully parked on a public road, street or parking lot, so it does not authorize RV living on private land21. We also could not confirm Union County's tiny-home occupancy rules or minimum dwelling size. A tiny home that qualifies as a covered single-family dwelling remains subject to Kentucky's adopted residential code even though Union County's page excepts single-family dwellings from its building-code inspection permit requirement21. Confirm the parcel's zoning, siting and proposed occupancy with the Planning Commission14.
Building a home in Union County: the steps, in order
First, call the Union County Joint Planning Commission at (270) 389-2093 to confirm the parcel's zoning status and whether subdivision approval applies14. Second, contact the Union County Health Center at (270) 389-1230 for a septic site evaluation175. Third, obtain the onsite sewage permit from the health department before construction, installation or alteration begins8. Fourth, design a single-family home to the Kentucky Residential Code even though Union County does not require its building-code inspection permit for that dwelling type21. Fifth, arrange the county electrical permit before electrical work begins1. Sixth, send any covered multi-family, commercial or change-of-occupancy permit application to the state Department of Housing, Buildings and Construction at (502) 573-03731. Seventh, apply to the Kentucky Department of Highways district engineer before building a driveway onto a state highway11. Eighth, request the septic installation inspection before backfilling19.
What to check before you buy land in Union County
Union County farmland has recently sold for around $6,523 an acre, well above many surrounding rural counties, and typical homes in the county are valued near $141,5612223. The county gets about 47.6 inches of rain a year and has sat in severe drought about 3.7% of years2425. About 89.5% of the county's land sits at 15% slope or less, so grading is easy on most parcels, and about 17.9% of soils are rated free of severe limitations for a conventional septic drain field, a workable but not guaranteed share, so plan on a site evaluation2612. About 20.5% of the county is wooded, less than many rural Kentucky counties, since much of Union County is in row-crop agriculture, which is part of why farmland here commands a higher price27. Confirm with the Planning Commission whether your specific parcel sits inside or outside a zoned city boundary before you assume either way about zoning4. Union County's effective property tax rate runs about 0.8%, with a median annual property tax bill near $858, and a typical home insurance premium around $1,711 a year282930.
Watch-outs
- Union County's single-family permit exception does not waive the Kentucky Residential Code; design the home to the state code even when no local building-code inspection permit is required12.
- The county's confirmed zoning map covers Morganfield, Sturgis and Waverly city limits; do not assume the same zoning rules automatically apply to unincorporated land without asking the Planning Commission directly4.
- With only about 17.9% of Union County's soils rated free of severe septic limitations, get a site evaluation before you commit to a specific building spot12.
- Union County's page excepts single-family dwellings from the building-code inspection permit, yet its site-plan procedure lists a building permit for residential site plans; ask the Codes Administrator which applies to your project13.
Sources
- Union County Building Code (Planning Commission page; permits routed to state DHBC) (unioncountyky.org)
- Department of Housing, Buildings and Construction, quoted and re-checked
- SITE PLAN PROCEDURE, quoted and re-checked
- Union County Zoning Ordinance & Map (Planning Commission page) (unioncountyky.org)
- Onsite Sewage Disposal Systems Program, quoted and re-checked
- 815 KAR 7:125, Kentucky Residential Code (Kentucky statewide rule), quoted and re-checked
- Union County KY Planning Commission - Zoning (2026 county census)
- 902 KAR 10:110 — Issuance of on-site sewage disposal system permits, quoted and re-checked
- KRS 198B.674 — Exemptions (Kentucky statewide rule), quoted and re-checked
- Building Codes, quoted and re-checked
- 603 KAR 1:020 Driveway approaches, entrances; construction and maintenance (Kentucky statewide rule), quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Site Plan Procedure, quoted and re-checked
- Union County Joint Planning Commission (unioncountyky.org)
- KRS 100.201 — Interim and permanent land use regulations authorized (Kentucky statewide rule), quoted and re-checked
- KRS 100.277 — Commission approval required for subdivisions (Kentucky statewide rule), quoted and re-checked
- Union County Health Center (Green River District Health Department) — Onsite Sewage Program (healthdepartment.org)
- Onsite Sewage Disposal Systems Program, quoted and re-checked
- 902 KAR 10:085 Kentucky on-site sewage disposal systems, quoted and re-checked
- Onsite Sewage Disposal Systems Program, quoted and re-checked
- KRS 511.110 — Unlawful camping (Kentucky statewide rule), quoted and re-checked
- Farmland value per acre (USDA census): Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: 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
Written October 10, 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.