How Lexington Handles Accessory Structures: A Practical Guide
Lexington maintains 222 local ordinances across all categories, and 9 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Lexington falls on the strict-to-permissive spectrum compared to other cities.
Carport Rules
Carports in Lexington are regulated by the Lexington-Fayette Urban County Government (LFUCG) Zoning Ordinance as accessory structures. Attached carports count as part of the primary dwelling and must meet principal building setbacks, while detached carports follow accessory structure setbacks (typically 3 feet from side and rear lot lines in most residential zones). Building permits are required for any carport with a permanent foundation or attached to the dwelling, and structures must comply with the Kentucky Residential Code for wind and snow loads.
Key details: undefined: undefined. undefined: undefined. undefined: undefined. undefined: undefined. undefined: undefined.
Contact your local code enforcement office for specific penalty information.
ADU Rules
Lexington-Fayette Urban County Government permits one accessory dwelling unit per lot on single-family residential properties under Zoning Ordinance Section 3-12. ADUs are capped at 800 square feet with an owner-occupancy requirement for either the primary dwelling or the ADU.
Key details: Maximum Size: 800 sq ft (basement conversions exempt). Units Per Lot: One ADU per single-family dwelling. Owner Occupancy: Owner must live in primary home or ADU. Short-Term Rental: Requires Board of Adjustment conditional use permit. Parking: No additional off-street parking required.
Contact your local code enforcement office for specific penalty information.
Garage Conversions
Converting a garage to living space in Lexington requires a building permit and must meet Kentucky Residential Code standards. Garage-to-ADU conversions are one of four permitted ADU types under Zoning Ordinance Section 3-12, subject to the 800 sq ft maximum and owner-occupancy rules.
Key details: Permit Required: Building permit plus zoning compliance. ADU Conversion: Allowed under Section 3-12 (800 sq ft max). Parking: Must still meet minimum off-street parking for zone. KRC Standards: 7-ft ceiling, ventilation, egress windows required. Historic Districts: Board of Architectural Review approval for exterior changes.
Contact your local code enforcement office for specific penalty information.
Tiny Homes
Lexington allows tiny homes on permanent foundations as primary dwellings if they meet the Kentucky Residential Code minimum of 120 square feet for the first habitable room and comply with LFUCG zoning minimum dwelling size requirements. Tiny homes on wheels (THOWs) are classified as recreational vehicles under Kentucky law and cannot be used as permanent residences on residential lots. Accessory dwelling units (ADUs) are permitted in limited circumstances on larger lots, and all tiny homes require standard building permits, plumbing connections, and zoning approval.
Key details: undefined: undefined. undefined: undefined. undefined: undefined. undefined: undefined. undefined: undefined.
Contact your local code enforcement office for specific penalty information.
Compared to other cities, Lexington takes a harder line on tiny homes. The enforcement and penalty structure reflects that.
Shed Rules
Sheds in Lexington are regulated as accessory buildings under Zoning Ordinance Section 15-6. Total accessory building area cannot exceed 50 percent of the primary dwelling footprint or 625 square feet, whichever is greater. Maximum height is 20 feet at mid-gable.
Key details: Max Total Accessory Area: 50% of primary building or 625 sq ft (whichever greater). Height Limit: 20 feet at mid-gable. Side/Rear Setback: Minimum 1.5 feet from lot line. Front Yard: Accessory buildings prohibited in required front yard.
Contact your local code enforcement office for specific penalty information.
ADU Permits
Lexington-Fayette Urban County Government regulates accessory dwelling units under Zoning Ordinance Section 3-12 (General Regulations for ADUs), adopted by ZOTA in October 2021 and updated in 2023. ADUs are permitted by right on most single-family residential lots through an administrative process. The applicant must hold a pre-application meeting with the Division of Planning and then submit a Residential ADU permit through the Division of Building Inspection's online portal. Kentucky has no statewide ADU preemption, so Lexington's local rules govern.
Key details: Governing Section: Zoning Ord. Sec. 3-12. Adopted: ZOTA Oct 2021, updated 2023. Max Size: 800 sq ft (basement conversion exempt). Units per Lot: One ADU per single-family. Permit Track: Administrative via Division of Building Inspection.
Constructing an ADU without permits violates Zoning Ordinance Section 5-2 (Permits Required) and the building code adopted at 815 KAR 7:120, enforced by the Division of Building Inspection through Stop Work Orders and citations. Civil penalties under LFUCG Code of Ordinances Section 5-29 are typically $150-$500 per violation per day plus the doubled after-the-fact permit fee. Repeat violations can be referred to Fayette District Court.
ADU Owner Occupancy
Lexington requires owner-occupancy on every ADU. Under Zoning Ordinance Section 3-12, either the main residence or the ADU must be the property owner's primary residence. The rule is enforced by the Division of Building Inspection and the Division of Planning. Kentucky has no statewide ADU preemption analogous to Colorado HB24-1152 or California Government Code 65852.2, so Lexington's owner-occupancy condition remains fully effective.
Key details: Owner Occupancy: Required (main OR ADU). Affidavit Filed: At permit application. ADU Occupancy Cap: 2 persons + related/custodial children. Investor Rental: Not permitted. KY State Preemption: None.
Renting both the main house and the ADU to non-owners violates Section 3-12, prosecuted by the Division of Planning and Division of Building Inspection through Notice of Violation, civil penalties under LFUCG Code Section 5-29 ($150-$500 per day), and potential revocation of the ADU certificate of occupancy. A change of ownership without the new owner meeting the occupancy condition is a referenceable violation at the next inspection or complaint.
This is not one of those rules that cities tend to ignore. Lexington actively enforces its adu owner occupancy requirements.
ADU Impact Fees
Lexington-Fayette does not levy a general municipal impact fee on residential development; Kentucky law (KRS 65.7625 etc.) gives local governments narrow impact-fee authority that LFUCG has not expanded for ADUs. ADUs pay standard building permit fees under LFUCG Code Section 5-29 ($0.10 per square foot, $150 minimum), plus Lexington-Fayette Urban County Water and Sewer connection fees, electrical permit fees, and any HVAC permit fees. No transportation, parks, or school impact fee applies.
Key details: General Impact Fee: None. Building Permit Fee: $0.10/sq ft ($150 min). Sewer Connection: $1,500-$3,000 typical. Water Connection: $1,500-$3,000 separate; $0 shared. School Impact Fee: $0 (not authorized).
Permits will not issue until all fees are paid in full. Construction without payment is a violation under LFUCG Code Section 5-29 with civil penalties typically $150-$500 per day plus the doubled after-the-fact permit fee. Unpaid utility connection fees can result in service refusal or termination by Kentucky-American Water (a regulated utility) and the LFUCG Sewer Division.
If you are coming from a city with tighter rules, you will find Lexington gives residents more flexibility on adu impact fees.
ADU Rental Restrictions
Long-term rental of a Lexington ADU is allowed only when the owner-occupancy rule in Zoning Ordinance Section 3-12 is satisfied - meaning the owner must live in either the main house or the ADU - and the ADU's occupancy is capped at two persons plus related children. Short-term rental of an ADU requires a conditional use permit from the Board of Adjustment under the December 2024 STR ordinance, with strict density caps: no permit if 2% of homes within 1,000 feet are already STRs or any unhosted STR exists within 600 feet.
Key details: Long-Term Rental: Allowed with owner occupancy. Occupancy Cap: 2 persons + related/custodial children. STR Permit: Conditional use from Board of Adjustment. STR Density Cap: 2% within 1,000 ft; 600 ft separation. STR Amendments: Eff. December 12, 2024.
Operating an STR without a conditional use permit is a violation of Zoning Ordinance Sections 3-12 and 8 (Conditional Uses), prosecuted through the Division of Planning with civil penalties under LFUCG Code Section 5-29 ($150-$500 per day) and possible referral to Fayette District Court. Violating the owner-occupancy condition or exceeding the two-person occupancy cap can result in revocation of the ADU certificate of occupancy. Code Enforcement uses Airbnb and Vrbo data subpoenas to identify unlicensed operators.
This is one of the stricter rules in Lexington's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
The Bottom Line
Lexington is tougher than many cities when it comes to accessory structures. Out of the 9 rules covered here, 3 are rated strict. If you are a homeowner, renter, or business owner in Lexington, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
Keep in mind that Lexington can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.