ADUs are allowed in GahannaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Gahanna, OH
Is your property eligible for an ADU?
# of Properties
12,510
Owner-occupied
78%
Zoning districts
26
Avg Home Value
$341,633
Median Lot Size
0.25 acres
Avg Income
$116,053
Residential Types:
12,510 housing units
Single Family
80%
2-3 Family
1%
Condos
11%
Other
8%
Zoning Districts:
13,595 parcels · 26 districts
R-1
27%(3,701)
R-3
26%(3,537)
R-2
18%(2,471)
R-4
16%(2,196)
Other
12%(1,690)
ADU Rules
What can you build in Gahanna, OH?
Gahanna, OH follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum size is the lesser of 1,000 sq ft or the principal dwelling’s footprint.
Detached ADU Size Limits
- –Maximum ADU size is 1,000 sq ft or the principal dwelling's footprint, whichever is less.
Max Units
- –1 ADU per lot (attached or detached)
Owner Occupancy
- –Principal dwelling must be owner-occupied while ADU exists.
Parking
- –1 off-street space per ADU (in addition to the principal dwelling's required parking); no maximum stated. Exceptions: driveway may satisfy residential off-street parking at 1 space per 300 sq ft of driveway coverage; public on-street spaces count only toward parking for non-residential uses; required spaces may be reduced via Development Plan under Section 1117.07 based on shared parking, transit access, and pedestrian accessibility.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other Ohio municipalities
Rules change at the town line. Check the municipality your property is actually in.
Franklin County