Bolthole Index

Jefferson County, Kentucky

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

42Index Score / 100
#117 of 120 in Kentucky

Unincorporated Jefferson County, Kentucky requires a building permit for new construction, additions, alterations and changes of use, issued by Louisville Metro Construction Review.1 Zoning is separate and administered by Louisville Metro's Office of Planning & Design Services.2 Septic permits are separate again: the Louisville Metro Department of Public Health and Wellness handles the onsite sewage program, and only about 10.3% of the county's soils are free of severe limits for a conventional drain field.345

At a glance

Building permit
Required by Louisville Metro Construction Review for new construction, additions and alterations1
Building codes
Kentucky Residential Code for one- and two-family dwellings; Kentucky Building Code for other covered construction, with Kentucky amendments6
Zoning
Yes, Louisville Metro administers zoning under its Land Development Code2
Septic permit
The local health department administers the program, including site evaluations, inspections and permit processing3
Owner-builder
A homeowner may personally do permitted plumbing, sewerage or drainage work in a qualifying home after applying and filing an affidavit7
Farmstead exemption
Available for a qualifying farm dwelling and incidental farm structures on at least 10 acres outside municipal limits8
Accessory dwelling units
A consolidated-government-specific state law restricts leasing an ADU unless the owner primarily resides on the lot9
Water well
Statewide, only a Cabinet-certified driller may construct, alter, repair or abandon a well10

Who to call

Building permits

Louisville Metro Construction Review

Building permits, plan review and inspections for new construction, additions and alterations in Jefferson County / Louisville Metro

(502) 574-3321

444. S. 5th Street, Louisville, KY 40202

Planning & zoning

Louisville Metro Office of Planning & Design Services

Zoning administration, Land Development Code interpretation and subdivision review for Jefferson County / Louisville Metro

502-574-6230

444 S. 5th Street, Louisville, KY 40202

Septic permits

Louisville Metro Department of Public Health and Wellness

Onsite Septic System Program: septic permitting, site suitability determinations and inspections for Jefferson County / Louisville Metro

(502) 574-6520

400 E. Gray Street, Louisville, KY 40202

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

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Do you need a building permit in Jefferson County, Kentucky?

Unincorporated Jefferson County, Kentucky requires building permits through Louisville Metro Construction Review for new construction, additions, alterations and changes of use.1 Kentucky's single-family permit exception does not override a local ordinance requiring a building permit.11 Kentucky adopted the 2018 Kentucky Residential Code, Second Edition for one- and two-family dwellings and the 2018 Kentucky Building Code, Second Edition for other covered construction; both incorporate Kentucky amendments to the underlying international codes.6 A qualifying homeowner may personally perform permitted plumbing, sewerage or drainage work in an occupied home or a home being built for personal residential use, after applying before work starts and filing an affidavit; the work must follow the state plumbing code.7 Only one homeowner permit for construction of a new home may be issued to an individual in a five-year period.7

Who issues building permits in Jefferson County, and how do you reach them?

Louisville Metro Construction Review handles building permits for unincorporated Jefferson County; call (502) 574-3321 about applications, plan reviews and inspections.112 Inside St. Matthews, obtain city plan approval and a letter of compliance before requesting the Metro building permit.13 Indian Hills requires a city building permit before new construction, additions or alterations.14 St. Regis Park issues building permits for auxiliary structures; houses, garages and additions need county building permits after a city letter of compliance.15 Audubon Park requires city and Metro building permits for covered work, with an exception for qualifying maintenance and minor work.16 Septic permits remain with Louisville Metro Public Health and Wellness, including inside cities.43

Does Jefferson County have zoning?

Louisville Metro administers zoning for unincorporated Jefferson County under its Land Development Code; call Planning & Design Services at 502-574-6230 for parcel requirements.217 Inside St. Matthews, the city adopts its own Development Code and amendments.18 Shively, Lyndon and Middletown adopt zoning or development regulations for their city limits.192021 Hurstbourne and Prospect adopt Jefferson County zoning provisions by reference.2223 Indian Hills applies city planning and zoning requirements, while Graymoor-Devondale requires compliance with Planning Commission zoning regulations and city ordinances.2425 Septic permits still go through Louisville Metro Public Health and Wellness.4 In a traditional single-family zone in Jefferson County, state law restricts new ADU leases starting after June 27, 2025 unless the owner primarily resides on the lot.9

How do septic permits work in Jefferson County?

Septic is handled separately from building permits: the local health department administers the onsite sewage program, including site evaluations, inspections and permit processing, and the Louisville Metro Department of Public Health and Wellness is the identified local authority at (502) 574-65203426. A certified installer must install the system based on the site evaluation; an owner doing the installation must obtain a homeowner's permit through the local health department3. Statewide, a permit from the local health department is required before any construction, installation or alteration of an onsite sewage disposal system begins, and that permit expires one year after issuance unless the state Cabinet grants an extension27. Where no public or private sewer is available, a house drain must connect to an approved private sewage disposal system.28 Every installed, constructed, altered or repaired system must also be inspected by a certified inspector before it is backfilled29. Only about 10.3% of Jefferson County's soils carry no severe limitation for a conventional drainfield, so a site evaluation before you buy is worth the cost5.

Can you live in an RV or tiny home on your land in Jefferson County?

We could not confirm whether Jefferson County or Louisville Metro allows residential RV or tiny-home occupancy on private land; ask Construction Review and Planning & Design Services about your proposed parcel and dwelling before buying.1217 Ask Planning & Design Services to identify the allowed residential uses and dimensional requirements for the parcel's zoning district, and ask Construction Review which building approvals the proposed dwelling needs.21

What are the steps to build a home in Jefferson County?

  1. Confirm zoning, subdivision status and Land Development Code requirements with Planning & Design Services.172
  2. Before dividing land, obtain planning-commission approval where subdivision law applies; qualifying agricultural divisions without a new street are exempt.3031
  3. Ask whether the farmstead exemption applies: qualifying farm dwellings and incidental farm structures need at least 10 acres outside municipal limits, bona fide farm use and county PVA registration.8
  4. Obtain a septic site evaluation and septic permit from Public Health and Wellness before onsite-system construction.3427
  5. For a well, hire a Cabinet-certified water-well driller.10
  6. Apply for the building permit through Construction Review; qualifying homeowner plumbing permits also require application before work begins.17
  7. In an identified floodplain, obtain both a Division of Water state floodplain permit and a local floodplain permit.32
  8. Arrange the required septic inspection before backfilling the system.29

What should you check before buying land in Jefferson County, Kentucky?

Check zoning and any subdivision or ADU restrictions with the Office of Planning & Design Services first, since Jefferson County's status as a consolidated government triggers the state's ADU leasing restriction179. Get a septic site evaluation before you make an offer: countywide, only 10.3% of soils carry no severe limitation for a conventional drainfield, so budget for engineering if the site tests poorly5. If you plan to drill a well, confirm your driller holds a current state certification, and note that Kentucky requires no property-owner permitting application or fee for constructing or abandoning a water well1033. If any part of the parcel is in a mapped floodplain, budget time for both a state and a local floodplain permit before you can build32. Jefferson County's effective property tax rate runs about 0.9%, with a median annual bill near $2,023.3435

Watch-outs

  • The homeowner permit covers qualifying plumbing, sewerage or drainage work performed personally by the owner; it is not a blanket exemption from Louisville Metro building permits71.
  • The farmstead exemption requires at least 10 acres, a location outside municipal limits, bona fide agricultural or horticultural use and county PVA registration8.
  • We could not confirm local RV or tiny-home occupancy rules, building-permit fees or district-specific dimensions; ask Construction Review about building applications and fees, and Planning & Design Services about allowed uses and setbacks.1217

Sources

  1. Louisville Metro Construction Review - Permits (2026 county census)
  2. Louisville-Jefferson County Metro Code of Ordinances (2026 county census)
  3. Onsite Sewage Disposal Systems Program, quoted and re-checked
  4. Louisville Metro - Onsite Septic System Program (2026 county census)
  5. 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
  6. Department of Housing, Buildings and Construction, quoted and re-checked
  7. Frequently Asked Questions (Plumbing), quoted and re-checked
  8. dhbc.ky.gov, quoted and re-checked
  9. KRS 383.199 — Restrictions on leases of certain housing and accessory dwelling units (Kentucky statewide rule), quoted and re-checked
  10. 401 KAR 6:320. Certification of water well drillers and water well driller assistants (Kentucky statewide rule), quoted and re-checked
  11. 815 KAR 7:125, Kentucky Residential Code (Kentucky statewide rule), quoted and re-checked
  12. Louisville Metro Construction Review (louisvilleky.gov)
  13. St. Matthews: § 152.10 Building or remodeling permit required (Jefferson County), quoted and re-checked
  14. Indian Hills: § 152.03 Building Permit Required (Jefferson County), quoted and re-checked
  15. St. Regis Park: § 150.16 Submission of Plans; Approval and Compliance (Jefferson County), quoted and re-checked
  16. Audubon Park: § 150.035 Permits Generally (Jefferson County), quoted and re-checked
  17. Louisville Metro Office of Planning & Design Services (louisvilleky.gov)
  18. St. Matthews: § 150.01 Development Code adopted by reference (Jefferson County), quoted and re-checked
  19. Shively: Shively Code § 156.01, Adoption by Reference (Jefferson County), quoted and re-checked
  20. Lyndon: § 152.01 City zoning regulations adopted (Jefferson County), quoted and re-checked
  21. Middletown: § 153.01 Adopted by Reference (Jefferson County), quoted and re-checked
  22. Hurstbourne: § 152.01 Zoning Regulations Adopted by Reference (Jefferson County), quoted and re-checked
  23. Prospect: § 155.01 Adoption by reference (Jefferson County), quoted and re-checked
  24. Indian Hills: § 152.03 Building Permit Required (Jefferson County), quoted and re-checked
  25. Graymoor-Devondale: § 150.21 Zoning Regulations Continue in Force (Jefferson County), quoted and re-checked
  26. Louisville Metro Department of Public Health and Wellness (louisvilleky.gov)
  27. 902 KAR 10:110. Issuance of on-site sewage disposal system permits (Kentucky statewide rule), quoted and re-checked
  28. 815 KAR 20:130. House sewers and storm water piping; methods of installation (Kentucky statewide rule), quoted and re-checked
  29. 902 KAR 10:085. System Installation Inspection (Kentucky statewide rule), quoted and re-checked
  30. KRS 100.277 — Commission approval required for subdivisions (Kentucky statewide rule), quoted and re-checked
  31. KRS 100.111 — Definitions for chapter (Kentucky statewide rule), quoted and re-checked
  32. Find Your Flood Zone (Kentucky statewide rule), quoted and re-checked
  33. Water Well Information for Home Owners (Kentucky statewide rule), quoted and re-checked
  34. Effective property tax rate: Bolthole Index county data
  35. Median property tax bill: Bolthole Index county data

Written October 12, 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.

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Compared with neighboring counties

Like all 6 of its neighbors, Jefferson County requires a building permit for a home.

RuleJefferson CountyOldham CountyBullitt CountySpencer CountyShelby CountyNelson CountyHenry County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsLouisville Metro Dept. of Public Health & WellnessCounty Health Dept.County Health Dept.North Central District Health Dept.North Central District Health Dept.Lincoln Trail District Health Dept.North-Central District Health Dept.

County locator

Jefferson County in Kentucky

42
County map
Jefferson County highlighted among the Kentucky counties · colored by Index score

How Jefferson County scores

Seclusion17100% ev.
Self-Sufficiency6398% ev.
Admin Boringness4190% ev.
Durability70100% ev.
Property Autonomy33100% ev.
Carry Cost59100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$271kTypical home
0.9%Property tax
$13,280Land / acre
50.1"Annual rain
2.1% of yrsSevere drought
10.3 / yr (+9.7)Mid-century 100°F days
14.1 daysMid-century dry spell
2.24" (+11.4%)Mid-century 1-day rain
1.81×Wildfire change factor
100%Forward climate coverage
$1,571Home insurance / yr
-1.8% / yrInsurance growth
0.8%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,024,320People within 30 min
5,105,083People within 2 hr
829,798Radius comparison (15 mi)
2,027.7People / sq mi
0%Federal land
81%Land at 15% slope or less
10.3%Soils rated "not limited" for septic (strict USDA rating)
11,706 acWorkable land screen
52.4 tonsBiomass / forest ac
56.5°FAvg temp

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Cities and towns in Jefferson County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Anchorage · Audubon Park · Barbourmeade · Beechwood Village · Bellemeade · Bellewood · Briarwood · Broeck Pointe · Brownsboro Farm · Brownsboro Village · Cambridge · Coldstream · Creekside · Crossgate · Druid Hills · Fincastle · Glenview · Glenview Hills · Glenview Manor · Goose Creek · Heritage Creek · Hills and Dales · Hollow Creek · Hollyvilla · Houston Acres · Hurstbourne Acres · Jeffersontown · Kingsley · Langdon Place · Lincolnshire · Lynnview · Manor Creek · Maryhill Estates · Meadow Vale · Meadowbrook Farm · Meadowview Estates · Mockingbird Valley · Moorland · Murray Hill · Norbourne Estates · Northfield · Norwood · Old Brownsboro Place · Parkway Village · Poplar Hills · Richlawn · Riverwood · Rolling Fields · Rolling Hills · South Park View · Spring Mill · Spring Valley · Strathmoor Manor · Strathmoor Village · Sycamore · Ten Broeck · Thornhill · Watterson Park · Wellington · Westwood · Wildwood · Woodland Hills · Worthington Hills

Answers from the rulebook for Jefferson County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Jefferson County rules

  • Who permits septicMixed (with conditions)

    Onsite sewage disposal systems in Jefferson County, Kentucky.

    • Kentucky regulates onsite sewage system construction, installation, and alteration through statewide law and regulation.
    • Local health departments administer the program, perform site evaluations and inspections, and issue or process permits.
    • A certified installer must install the system based on the site evaluation; a homeowner installing their own system must obtain a homeowner’s permit through the local health department.
    “The Onsite Sewage Disposal Systems Program is administered through local health departments”
  • County-wide zoningPresent

    Louisville Metro Planning & Design Services administers zoning under the Land Development Code; zoning review may be required before permit issuance.

    Louisville-Jefferson County Metro Code of Ordinances ↗Scouted from the county site, not yet independently re-checked

Kentucky rules that apply here

  • Building permitNot required (with conditions)

    Single-family dwellings constructed in Kentucky under the Kentucky Residential Code.

    • A local ordinance may independently require a permit.
    • The 2015 International Residential Code and 2018 Kentucky Residential Code apply to the covered residential construction.
    • This claim does not determine municipal or county permit ordinances.
    “Permits, inspections, and certificates of occupancy shall not be required for a single-family dwelling unless required by local ordinance.”
  • Owner-builder exemptionConditional

    An individual property owner performing heating, ventilation, and air conditioning work on property the individual owns and occupies.

    • The exemption applies to KRS 198B.650 to 198B.689, Kentucky's HVAC contractor provisions.
    • The owner must own and occupy the property.
    • For installation of an initial HVAC system, the owner must apply for a permit before beginning installation.
    • An exempt owner need not possess or show proof of an HVAC license to obtain the required HVAC permit.
    • Applying for the HVAC permit constitutes consent to inspection by authorized Commonwealth and relevant local-government inspectors.
    • No HVAC permit is required for installation on a manufactured home by a licensed manufactured-home retailer or manufacturer, and no permit or inspection is required for window-unit air conditioners, space heaters, or HVAC systems in buildings not designed for human occupancy.
    “KRS 198B.650 to 198B.689 shall not apply to: [...] (3) An individual owner of real property while practicing heating, ventilation, and air conditioning work on or within property owned and occupied by the individual;”
    One more reviewed finding on this topic
    • Available (with conditions) — Homeowner permits for plumbing, sewerage, or drainage work in an owner-occupied home or a home the owner will construct for personal residential use.
      “Permits to construct, install or alter plumbing, sewerage or drainage may be issued to homeowners who desire to install plumbing in homes actually occupied by them or in a home to be constructed by them for their own personal residential use, if all the following requirements are met:”
  • Building code adoptedAdopted (with conditions)

    Buildings constructed statewide in Kentucky, including residential and nonresidential construction subject to the Kentucky Building Code and Kentucky Residential Code.

    • The 2015 International Building Code is the mandatory state building code for buildings constructed in Kentucky, subject to Kentucky amendments in the 2018 Kentucky Building Code.
    • One-family dwellings, two-family dwellings, and townhouses are governed by 815 KAR 7:125 and the 2015 International Residential Code with Kentucky amendments in the 2018 Kentucky Residential Code.
    • Permits, inspections, and certificates of occupancy are not required for a single-family dwelling unless required by local ordinance.
    • Residential occupancies that are not single-family dwellings, two-family dwellings, or townhouses must comply with the 2015 International Building Code and the 2018 Kentucky Building Code.
    • Manufactured homes are governed by KRS 227.550 through 227.665.

    base building code: 2015 International Building Code (Kentucky amendments in the 2018 Kentucky Building Code supersede conflicting provisions) · residential code: 2015 International Residential Code; 2018 Kentucky Residential Code amendments (Applies to single-family dwellings, two-family dwellings, and townhouses under 815 KAR 7:125) · mandatory effective date: 2019-01-01

    “Building Code. The 2015 International Building shall be the mandatory state building code for all buildings constructed in Kentucky except that: (1) The Kentucky amendments in the 2018 Kentucky Building Code shall supersede any conflicting provision in the 2015 International Building Code; (2) One (1) family dwellings, two (2) family dwellings, and townhouses shall be governed by 815 KAR 7:125; and (3) Manufactured homes shall be governed by KRS 227.550 through 227.665.”
    3 more reviewed findings on this topic
    • Adopted — Kentucky Building Code and Kentucky Residential Code applicable statewide, including construction subject to those codes in Jefferson County.
      “The Department of Housing, Buildings and Construction adopted the 2018 Kentucky Building Code, Second Edition and the 2018 Kentucky Residential Code, Second Edition”
    • Adopted (with conditions) — Kentucky buildings subject to the Kentucky Building Code and Kentucky Residential Code, including construction in Jefferson County.
      “The Department of Housing, Buildings and Construction adopted the 2018 Kentucky Building Code, Second Edition and the 2018 Kentucky Residential Code, Second Edition on August 3, 2019. These codes are based on the 2015 International Building Code and the 2015 International Residential Code for One- and Two- Family Dwellings and the Kentucky specific amendments.”
    • Adopted — Mandatory Kentucky residential building-code standards for single-family dwellings, two-family dwellings, and townhouses constructed statewide, including unincorporated areas.
      “Except as provided in subsection (2) of this section, the 2015 International Residential Code for One (1) and Two (2) Family Dwellings (IRC) shall be the mandatory state residential building code for all single-family dwellings, two (2) family dwellings, and townhouses constructed in Kentucky, except that the Kentucky amendments in the 2018 Kentucky Residential Code shall supersede any conflicting provision in the 2015 IRC.”
  • InspectionsNot required (with conditions)

    Single-family dwellings constructed in Kentucky under the Kentucky Residential Code.

    • A local ordinance may independently require inspections.
    • This claim does not determine municipal or county inspection ordinances.
    “Permits, inspections, and certificates of occupancy shall not be required for a single-family dwelling unless required by local ordinance.”
  • Certificate of occupancyNot required (with conditions)

    Single-family dwellings constructed in Kentucky under the Kentucky Residential Code.

    • A local ordinance may independently require a certificate of occupancy.
    • This claim does not determine municipal or county certificate-of-occupancy ordinances.
    “Permits, inspections, and certificates of occupancy shall not be required for a single-family dwelling unless required by local ordinance.”
  • Zoning districtsPartial

    Kentucky's statewide statutory framework for zoning-district texts and maps adopted by local planning units; the statutes do not provide a statewide inventory of individual district names or boundaries.

    • Zoning is enacted by a city or county under KRS Chapter 100 rather than automatically imposed statewide.
    • The zoning text must list the types of zones that may be used and the regulations for each zone.
    • The zoning map must show the boundaries of the area to be zoned and the boundaries of each zone.
    • Before enactment, the planning commission must prepare the zoning text and map and hold at least one public hearing.
    • After the hearing, the planning commission submits the approved text and map with its recommendation to legislative bodies and fiscal courts for adoption; passage requires a majority of the entire legislative body or fiscal court.
    • Planning units may be independent city or county units, joint city-county units, or regional groups of counties and cities.
    • Joint city-county and regional planning-unit jurisdiction is coterminous with political boundaries; an independent city planning unit may exercise consent-based extraterritorial jurisdiction up to five miles for subdivision and other regulations, subject to statutory limits.
    • KRS 100.203 states an effective date of July 13, 2004; KRS 100.207 states an effective date of July 15, 1988; those dates are included as source-stated statutory effective dates, not as dates for any particular local zoning map.
    “Cities and counties may enact zoning regulations which shall contain: (1) A text, which shall list the types of zones which may be used,”
  • Camping on your landLimited

    Camping or sleeping in the specified public and private pedestrian or vehicle-use areas statewide.

    • The person must knowingly enter or remain in a listed area with intent to sleep or camp.
    • The area must not have been designated for sleeping or camping, or the individual must lack authorization to sleep or camp there.
    • The listed areas include streets, sidewalks, areas under bridges or underpasses, paths, parks, cemeteries, and other areas designated for pedestrians or vehicles, including ingress or egress areas to businesses, homes, or public buildings.
    • The first offense is a violation; a second or subsequent offense, or a first offense where the person refuses to cease, is a Class B misdemeanor.
    • The section does not prohibit customary and temporary use of recreational camping areas, rest areas, or other properties specifically designated for resting or sleeping.
    • Temporary sleeping in a vehicle parked lawfully on a public road, street, or parking lot is not prevented when sleeping and parking occur for less than twelve (12) hours.

    temporary vehicle sleeping period: < 12 hours (The vehicle must be parked lawfully on a public road, street, or parking lot.)

    “A person is guilty of unlawful camping when he or she knowingly enters or remains on a public or private street, sidewalk, area under a bridge or underpass, path, park, cemetery, or other area designated for use by pedestrians or vehicles, including areas used for ingress or egress to businesses, homes, or public buildings, with the intent to sleep or camp in that area, when the area has not been designated for the purpose of sleeping or camping or the individual lacks authorization to sleep or camp in the area.”
    2 more reviewed findings on this topic
    • Allowed (with conditions) — Temporary camping locations for unsheltered homeless individuals designated by local governments under Kentucky law.
      “A local government may designate indoor or outdoor areas with defined boundaries in an area zoned for commercial or industrial use, separate from any area frequently used for public purposes, as a temporary camping location for unsheltered homeless individuals.”
    • Limited — Temporary parking of recreational vehicles on public or private property associated with specified publicly announced events.
      “Nothing in KRS 219.310 to 219.410 shall be construed to apply to the temporary parking of recreational vehicles on public or private property, for not more than thirty (30) days, associated with festivals, fairs, sporting events, yard sales, or other publicly announced events.”
  • Accessory dwellingsLimited

    Accessory dwelling units on lots containing a single-family home in a county containing a consolidated local government, when a new lease is initiated after June 27, 2025 and the lot is in a traditional single-family home zone.

    • The owner may not lease or allow the accessory dwelling unit to be occupied unless the owner primarily resides in the single-family home, multifamily housing unit, or accessory dwelling unit on the lot.
    • The restriction applies only in a county containing a consolidated local government.
    • A traditional single-family home zone is a zone that, as of January 1, 2025, did not include multifamily homes as a permitted use.
    • The restriction does not apply to a lot containing only one single-family home and no accessory dwelling unit.
    • The statutory effective date is June 27, 2025.

    new lease applicability date: > 2025-06-27 (The statute applies to new leases initiated after June 27, 2025.)

    “In a county containing a consolidated local government, for new leases initiated after June 27, 2025, a property owner shall not lease or allow to be occupied any single-family home, multifamily housing unit, or accessory dwelling unit located on a lot that contains a single-family home and that is located in a traditional single-family home zone, unless the owner primarily resides in the single-family home or multifamily housing unit or an accessory dwelling unit on the lot.”
  • Septic permitRequired

    Construction, installation, or alteration of an onsite sewage disposal system subject to Kentucky Cabinet regulation.

    • A permit must be obtained from the local health department before construction, installation, or alteration.
    • The construction permit follows a site evaluation and requires a detailed drawing, specifications, and required permit fees.
    • The permit is issued only to a certified installer or homeowner and expires one year after issuance unless the Cabinet grants an extension.
    • Local health departments may adopt more specific subdivision-approval requirements if they do not conflict with the state regulation.

    permit validity: 1 year from issuance (unless an extension is granted by the cabinet)

    “a permit to construct, install, or alter an on-site sewage disposal system shall be obtained prior to construction of any portion of that system.”
  • Septic inspectionRequired

    Every Kentucky onsite sewage disposal system that is installed, constructed, altered, or repaired.

    • Inspection must be by a certified inspector.
    • The installer must request that the installation inspection be scheduled and completed before the system is backfilled.
    • An installer affidavit may substitute for an initial inspection in the circumstances specified by the regulation, but the installation inspection requirement remains applicable.
    • A variance may not waive site evaluation or system inspection.
    “Every on-site sewage disposal system installed, constructed, altered, or repaired shall be inspected by a certified inspector.”
  • Off-grid sanitationProhibited

    Use of seepage pits, cesspools, or dry wells as onsite sewage disposal systems statewide in Kentucky, subject to the Section 13 exception.

    • The prohibition is subject to the exception provided in Section 13 of 902 KAR 10:085.
    • Section 13 permits limited repair or alteration of existing seepage-pit systems when municipal or public sewage treatment is unavailable and repair or alteration is required because of malfunction, damage, or upgrade.
    • A limited single-family vacant-lot exception applies to certain lots purchased on or before May 1, 1992, if bona fide construction began by December 25, 1992.
    “Except as provided in Section 13 of this administrative regulation, use of seepage pits, cesspools, or dry wells;”
    One more reviewed finding on this topic
  • Well permitNot required

    Construction or abandonment of a private water well by a property owner statewide in Kentucky.

    • Construction, modification, and abandonment must be performed by a Kentucky Certified Water Well Driller.
    • The certified driller must complete and submit required documentation within sixty days after completion.
    • The conclusion concerns owner permitting applications and fees; it does not eliminate the separate driller-certification requirement.

    well documentation submission deadline: 60 days after completion

    “there are no permitting applications or fees for constructing or abandoning a water well required of the property owner.”
    One more reviewed finding on this topic
  • Mandatory utility hookupConditional

    Buildings subject to the Kentucky State Plumbing Code.

    • A building must have an independent connection to either a public or private sewer or sewer system.
    • If a sewer is not available, the house drain must connect to an approved private sewage disposal system.
    • The cited rule does not establish a universal requirement to connect to public water service.
    “If a sewer is not available, the house drain from a building shall connect with an approved private sewage disposal system.”
  • Agricultural exemptionConditional

    Agritourism buildings subject to the Kentucky Building Code.

    • Except as otherwise provided, an agritourism building must comply with the Kentucky Building Code.
    • The exemption applies to an agritourism building built prior to December 31, 2016.
    • The pre-December 31, 2016 building is exempt from seismic requirements.
    • If the building has a capacity of 400 persons or is 6,000 square feet or less, it does not require the services of a Kentucky-licensed architect.

    construction date threshold: < December 31, 2016 · building capacity threshold: <= 400 persons (The statute states "has a capacity of four hundred (400) persons or is six thousand (6,000) square feet or less.") · building area threshold: <= 6000 square feet (The statute states "has a capacity of four hundred (400) persons or is six thousand (6,000) square feet or less.")

    “An agritourism building built prior to December 31, 2016, shall be exempt from the following requirements within the Kentucky Building Code: (a) An agritourism building built prior to December 31, 2016, shall not be required to comply with the seismic requirements within the Kentucky Building Code; and (b) If an agritourism building has a capacity of four hundred (400) persons or is six thousand (6,000) square feet or less, an agritourism building built prior to December 31, 2016, shall not require the services of an architect licensed by the Commonwealth of Kentucky.”
    2 more reviewed findings on this topic
    • Available (with conditions) — Farmstead exemption for a farm dwelling and incidental farm buildings or structures.
      “A. To qualify for a farmstead exemption the following must be met. A farm dwelling together with other farm buildings and structures incident to the operation and maintenance of the farm situated on 10 acres or more of land which is located outside the corporate limits of a municipality.”
    • Conditional — Division of land for agricultural use under Kentucky subdivision law.
      “provided that a division of land for agricultural use and not involving a new street shall not be deemed a subdivision.”
  • Subdividing landRegulated (with conditions)

    Subdivision of land within a Kentucky planning-unit jurisdiction.

    • All subdivision of land must receive planning-commission approval.
    • A person may not subdivide land before securing approval of a planning-commission plat.
    • A subdivision plat may not be recorded by the county clerk until commission approval is entered on the plat.
    • The statute's agricultural-use exception is addressed separately in KRS 100.111(22).
    “All subdivision of land shall receive commission approval. No person or his agent shall subdivide any land before securing the approval of the planning commission of a plat designating the areas to be subdivided, and no plat of a subdivision of land within the planning unit jurisdiction shall be recorded by the county clerk until the plat has been approved by the commission and the approval entered thereon in writing by the chairman, secretary, or other duly authorized officer of the commission.”
  • Driveway accessRequired

    New or additional private farm or single-family dwelling driveway approaches on Kentucky Department of Highways rights-of-way.

    • The owner or occupant must make formal written application to the District Engineer of the Department of Highways.
    • The applicant must furnish required drainage pipe, tile, or other drainage structure at the applicant's own expense.
    • The Department may participate up to $300 for specified construction work.
    • No indemnity bond or other security is required unless estimated construction cost within the right-of-way exceeds $300.
    • The District Engineer may approve or disapprove the application.

    department participation maximum: <= 300 USD (specified drainage, grading, and surfacing work within right-of-way limits)

    “The owner or occupant of property, who desires to construct new or additional private farm or single family dwelling driveway approaches, shall make formal application in writing, to the District Engineer of the Department of Highways.”
    One more reviewed finding on this topic
    • Required — New, additional, relocated, or modified driveway entrance approaches serving commercial property or property used for a purpose other than farming or a single-family dwelling.
      “The owner or occupant of property, used for commercial or any purpose other than farming or single family dwelling, who desires to construct new or additional driveway entrance approaches, to relocate, or make other changes in existing driveway entrance approaches thereto, shall make application for a permit to the District Engineer of the Department of Highways upon standard forms furnished by the Transportation Cabinet.”
  • Building in a floodplainRequired

    Development in an identified Kentucky floodplain, including development in mapped A and AE zones.

    • Both a state and local floodplain permit are required for development in an identified floodplain.
    • State and local permits are required for development in A and AE zones.
    • The Kentucky Division of Water issues general or individual floodplain permits.
    • General permits cover eligible activities that do not change the Base Flood Elevation and have minimal flood-risk potential.
    • Developments that do not meet general-permit eligibility or could change the Base Flood Elevation require an individual permit.
    • The source directs applicants to consult the local floodplain coordinator for local requirements.

    general permit nonsubstantial improvement threshold: < 50 percent of structure valuation (including labor)

    “Any development in an identified floodplain in Kentucky requires a state and a local floodplain permit.”
  • Permit feesPublished (with conditions)

    Kentucky state plumbing installation permits administered by the Division of Plumbing.

    • Residential one- and two-family permits use a $50 base fee plus $14 per opening.
    • Domestic water heater-only permits are $50.
    • Commercial permits use a $50 base fee plus $20 per opening.
    • Medical gas piping permits use a $50 base fee plus $20 per opening.
    • The fee schedule is stated as effective March 1, 2022.

    residential base permit fee: 50 USD (one- and two-family permits) · residential opening fee: per 14 USD (opening) · commercial base permit fee: 50 USD (commercial permits) · commercial opening fee: per 20 USD (opening)

    “FEE CHANGE - Effective March 1, 2022, Plumbing installation permit fees will be as follows: Residential (One and Two Family) Permits: $50 base permit fee, $14 per opening fee Domestic Water Heater Only Permits: $50 Commercial Permits: $50 base permit fee; $20 per opening fee Medical Gas Piping Permits: $50 base permit fee; $20 per opening fee”
  • Permit processPublished (with conditions)

    Plumbing construction and alteration work in Kentucky administered by the Division of Plumbing.

    • A plumbing construction permit must be obtained before construction, installation, or alteration.
    • Permits may be issued to licensed master plumbers or homeowners for plumbing in their own personal residences.
    • Work performed by someone other than a homeowner using the homeowner's own permit must be installed by a licensed journeyman plumber under the supervision of a licensed master plumber.
    • The Division reviews plans for construction on all buildings serving the public and inspects installations for compliance with the Kentucky State Plumbing Code.
    “No person, firm or corporation shall construct, install or alter any plumbing without first having procured a plumbing construction permit from the Division of Plumbing. Plumbing permits may be issued to licensed master plumbers or to homeowners for plumbing in their own personal residences.”
  • Campground & park staysTemporary only (with conditions)

    Sleeping temporarily in a recreational vehicle or other vehicle in a vehicle-based location covered by KRS 511.110.

    • The vehicle must be parked lawfully on a public road, street, or parking lot.
    • Sleeping and parking at the location must occur for less than twelve (12) hours.
    • This provision does not establish permission for long-term or permanent RV occupancy on private land.
    • KRS 511.110 separately prohibits camping in specified areas when the area has not been designated for sleeping or camping or the person lacks authorization.

    maximum sleeping and parking period: < 12 hours

    “Nothing in this section shall prevent a person from sleeping temporarily in his or her vehicle parked lawfully on a public road, street, or parking lot, where the sleeping and parking of the vehicle at the location occur for a period of less than twelve (12) hours.”
  • county zoning authorityGeneral

    Kentucky counties' statutory authority to enact zoning regulations, including county-regulated areas outside incorporated municipalities as determined by the applicable planning-unit and political-boundary structure.

    • The statute expressly authorizes both cities and counties to enact zoning regulations.
    • A zoning regulation must contain text listing the types of zones and regulations applicable in each zone, uniform throughout the zone, and provisions for variances, conditional-use permits, and nonconforming uses.
    • Authorized subjects include land activities, structure dimensions and locations, open-space and distance requirements, density, special-interest districts, fringe areas, and activities or structures near thoroughfares, water bodies, public facilities, aircraft facilities, unique places, and floodplains.
    • Agricultural land must have no regulations except that setback lines may be required for streets and highways; floodway or floodplain buildings or structures may be fully regulated; mobile homes and other dwellings may be regulated; and uses under KRS 100.111(2)(c) may be regulated as conditional uses.
    • The applicable planning unit and political boundaries determine the area governed by a county zoning regulation.
    “Cities and counties may enact zoning regulations which shall contain:”
    One more reviewed finding on this topic
    • General — Kentucky counties may adopt permanent land-use regulations, including zoning, through the applicable planning-unit process; this authority reaches county jurisdiction, including unincorporated areas, subject to the statutory planning prerequisites.
      “When all required elements of the comprehensive plan have been adopted in accordance with the provisions of this chapter, then the legislative bodies and fiscal courts within the planning unit may enact permanent land use regulations, including zoning and other kinds of growth management regulations”
  • county building authorityGeneral

    Kentucky fiscal courts may adopt and enforce construction regulations and may require building permits for construction in the county, including residential construction in unincorporated areas.

    • The construction regulations must be adopted by county order or resolution.
    • The regulations operate pursuant to KRS 198B.060 and the Uniform State Building Code framework.
    • A county building inspector may administer the regulations.
    • No person may build, erect, construct, reconstruct, remodel, relocate, alter, or repair a building within the county without first obtaining a building permit from the building inspector when the county permit system applies.
    • Permit fees must be reasonable and may not exceed the cost of the service provided.
    • A person aggrieved by the building inspector's ruling, order, or decision may appeal under KRS 198B.070.

    permit fee ceiling: <= cost of the service provided

    “The fiscal court of any county shall have authority, by order or resolution, to adopt, and to enforce, regulations governing construction as defined by KRS 198B.010 pursuant to the provisions of KRS 198B.060.”
    One more reviewed finding on this topic
    • General — Kentucky county authority, as a local government, to enforce the Uniform State Building Code and issue building permits within its jurisdiction, including unincorporated residential construction.
      “Each local government shall employ a building official or inspector and other code enforcement personnel as necessary, or shall contract for inspection and code enforcement services in accordance with subsections (8) and (11) of this section to enforce the Uniform State Building Code within the boundaries of its jurisdiction, except that permits, inspections, and certificates of occupancy shall not be mandatory for single-family residences unless a local government passes an ordinance requiring inspections of single-family residences.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Local zoning — Aggregate local zoning across Jefferson County municipalities and unincorporated areas.
  • Minimum dwelling size — Minimum dwelling size requirements in Jefferson County.
  • Minimum lot size — Minimum lot size requirements in Jefferson County.
  • Setbacks — Setback requirements in Jefferson County.
  • Lot coverage — Lot coverage requirements in Jefferson County.
5 more unanswered
  • Building height
  • Living in an RV
  • Tiny homes
  • Manufactured homes
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Jefferson County, Kentucky

Is Jefferson County a good place to live off-grid or homestead?

Jefferson County scores 42/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals and strong self-sufficiency basics: 50.1″/yr rainfall with little drought. Watch-outs: little seclusion — roughly 1,024,320 people within a 30-minute drive and a weaker property-autonomy legal backdrop.

Do you need a building permit in Jefferson County, Kentucky?

Jefferson County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Louisville Metro Department of Public Health and Wellness (Onsite Septic System Program). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Jefferson County, Kentucky?

Land in Jefferson County runs about $13,280 per acre, based on the latest county data.

What is the water situation in Jefferson County?

Jefferson County gets about 50.1" of rain a year, with severe drought in roughly 2.1% of years.

How remote is Jefferson County?

A representative private-land location has about 1,024,320 people within a 30-minute drive and 5,105,083 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Jefferson compares in Kentucky

Compare side-by-side →See all 120 Kentucky counties ranked →