Accessory Structures in Louisville, KY (2026)
5 verified accessory structures rules for Louisville, Kentucky, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Louisville Metro's 2021 LDC amendments (LDC § 4.3.27) allow ADUs on single-family lots with administrative approval. ADUs are limited to 800 sq ft or 30% of the principal structure (whichever is greater). Owner occupancy of either the main home or ADU is required. ADUs approved under this provision cannot be used as short-term rentals.
Louisville Metro ADU (Accessory Dwelling Unit) Rules
Some RestrictionsShed Rules
Louisville Metro allows one-story detached accessory structures under 200 sq ft without a building permit. Structures 200 sq ft or larger require a permit. Combined accessory structure footprint cannot exceed the main house footprint. Maximum height is 24 feet or the height of the main house (whichever is lower).
Louisville Metro Shed & Accessory Structure Rules
Few RestrictionsGarage Conversions
Garage conversions to living space require a building permit in Louisville Metro. Converting a garage to an accessory apartment or additional living unit may require a Conditional Use Permit. All conversions must meet Kentucky Residential Code standards for insulation, egress, ventilation, and electrical work.
Louisville Metro Garage Conversion Rules
Some RestrictionsCarport Rules
Carports in Louisville Metro are regulated under the Land Development Code as accessory structures. Typical setback rules require a minimum of 3 to 5 feet from side and rear property lines and conformance with the front setback line of the principal dwelling. Building permits are required for carports over 200 square feet, and structures must comply with the Kentucky Residential Code for wind loading and snow.
Carport Rules in Louisville
Some RestrictionsTiny Homes
Tiny homes in Louisville Metro are allowed as primary residences when built on a permanent foundation to the Kentucky Residential Code, meeting minimum dwelling size and bedroom standards. Tiny homes on wheels (THOWs) are treated as recreational vehicles and cannot serve as permanent dwellings in most residential zones. Accessory dwelling unit (ADU) rules have been expanding and may allow small secondary units on existing lots.
Tiny Homes in Louisville
Some RestrictionsLooking for Jefferson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Louisville city rules.
Accessory Structures in Jefferson County →