ADU (Accessory Dwelling Unit) Permit in Lexington (2026)
ADU (Accessory Dwelling Unit) permit requirements, fees, and process for Lexington, KY. Find out if you need a permit and how to apply.
Yes, a ADU (Accessory Dwelling Unit) permit is required in Lexington, KY.
A ADU (Accessory Dwelling Unit) permit is required in Lexington, KY. The Lexington-Fayette Urban County Government Division of Building Inspection handles permit applications for Lexington. Below you will find the current thresholds, fees, and process for obtaining a adu (accessory dwelling unit) permit in Lexington.
When Is a Permit Required?
When a ADU (Accessory Dwelling Unit) Permit Is Required in Lexington: All ADU construction
Permit Fees
ADU (Accessory Dwelling Unit) Permit Fees in Lexington: $1,800–$7,000. Estimated timeline: 5-9 weeks.
Estimated timeline: 5-9 weeks
How to Get a ADU (Accessory Dwelling Unit) Permit in Lexington
Verify whether your project meets the permit threshold in Lexington: All ADU construction.
Prepare your permit application and plans. Contact the Lexington-Fayette Urban County Government Division of Building Inspection at https://www.lexingtonky.gov/planning for required documentation.
Submit your application online at https://www.lexingtonky.gov/permits or in person at the Lexington-Fayette Urban County Government Division of Building Inspection.
Pay the permit fee: $1,800–$7,000.
Wait for plan check approval. Estimated timeline: 5-9 weeks.
Schedule required inspections through https://www.lexingtonky.gov/inspections. All inspections must pass before project is finalized.
Important: LFUCG building permit required. Kentucky American Water and KU connection fees for independent utilities.
Lexington-Fayette Urban County Government Division of Building Inspection
Phone: (859) 425-2255
Website: https://www.lexingtonky.gov/planning
Online Permits: https://www.lexingtonky.gov/permits
Hours: Mon-Fri 8:00am-4:30pm
Frequently Asked Questions
What is LFUCG and how does it differ from other Kentucky cities?
LFUCG (Lexington-Fayette Urban County Government) is the consolidated government formed in 1974 when the City of Lexington and Fayette County merged — one of the earliest consolidated city-county governments in the US. Like Nashville and Louisville (which consolidated later), LFUCG means one government handles planning, permitting, and services for the entire Fayette County area. Louisville's merger was in 2003; Lexington's was in 1974. This means one permitting department and one zoning ordinance for all of Lexington and Fayette County.
What is Lexington's Urban Growth Boundary and how does it affect development?
Lexington's Urban Growth Boundary (established in 1958 and strengthened over decades) is one of the most effective land-use controls in the US. It restricts development to the designated Urban Service Area, preserving the surrounding Bluegrass horse farm landscape. This means Lexington cannot sprawl outward the way Louisville or Frankfort have. The result: higher land values inside the boundary, more compact development, and strong incentives for infill and ADU development. If you're buying property for investment, understanding whether it's inside or outside the Urban Service Area is critical.
Can I build an ADU on my Lexington property?
Yes. LFUCG allows accessory dwelling units on single-family lots within the Urban Service Area. Maximum size is typically 850 sqft for detached ADUs. Kentucky has no statewide ADU law — LFUCG's Zoning Ordinance governs. No owner-occupancy requirement. Building permit from LFUCG required. Kentucky Utilities and Kentucky American Water connection fees apply for independent utility service.
How does the University of Kentucky affect Lexington's rental market?
UK's enrollment of approximately 30,000+ students creates significant rental demand in neighborhoods adjacent to campus — Chevy Chase, the Woodland-Ashland area, and Richmond Road corridor. This creates strong ADU investment potential in campus-adjacent neighborhoods. UK sports (Big Blue Nation) also drive short-term rental demand. Chevy Chase and Woodland Hills are established older neighborhoods with more limited deed restrictions than newer master-planned communities.
Are there historic preservation requirements in Lexington?
Yes. Gratz Park (one of Kentucky's oldest neighborhoods), Woodland-Ashland Avenues, and other Lexington areas have historic designations. If your property is a contributing structure in a locally designated historic district or is a Lexington-Fayette County Historic Landmark, you may need a Certificate of Appropriateness for exterior modifications. Contact the LFUCG Division of Planning to verify your property's historic status.
Source: Lexington Building Code — ADU (Accessory Dwelling Unit) Requirements. Last verified April 6, 2026. View source