ADUs are allowed in LouisvilleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Louisville, KY
Is your property eligible for an ADU?
# of Properties
31,677
Owner-occupied
12%
Zoning districts
49
Avg Home Value
$829,651
Median Lot Size
0.22 acres
Avg Income
$67,796
Residential Types:
31,677 housing units
Single Family
3%
2-3 Family
9%
Apts (4+ units)
69%
Other
19%
Zoning Districts:
255,556 parcels · 49 districts
R4
38%(98,360)
R5
30%(76,757)
R6
9%(22,575)
R7
4%(9,460)
Other
19%(48,404)
ADU Rules
What can you build in Louisville, KY?
Louisville, KY follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size is the greater of 800 sq ft or 30% of the principal dwelling’s gross floor area.
Detached ADU Size Limits
- –Maximum size of 800 sq ft or 30% of the principal structure’s gross floor area, whichever is greater.
Max Units
- –1 ADU per lot for single-family (attached or detached).
- –1 ADU in the Accessory Structure Area per duplex lot (in addition to the two principal units).
Owner Occupancy
- –Owner must reside in either the principal or the ADU
Parking
- –Municipality-wide min: 0; Old Louisville/Limerick TNZD requires 1 space per ARU (ADU not counted as an extra unit); off-street parking must meet Chapter 9, with 10% reductions within 1,000 feet of transit; max by district (e.g., Suburban Form 5, Traditional Form 3).
Rental Restrictions
- –Short-term rentals (<30 days) prohibited.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Kentucky municipalities
Rules change at the town line. Check the municipality your property is actually in.
Jefferson County
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