ADUs are allowed in DaytonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Dayton, OH
Is your property eligible for an ADU?
# of Properties
67,519
Owner-occupied
45%
Zoning districts
50
Avg Home Value
$92,233
Median Lot Size
0.12 acres
Avg Income
$50,297
Residential Types:
67,519 housing units
2-3 Family
1%
Apts (4+ units)
95%
Condos
1%
Other
3%
Zoning Districts:
86,998 parcels · 50 districts
ER-4
34%(29,698)
MR-5
31%(26,729)
SR-2
12%(10,270)
I-2
3%(2,763)
Other
20%(17,538)
ADU Rules
What can you build in Dayton, OH?
Dayton, 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 of 66% of the principal dwelling’s gross floor area for an attached or internal ADU
Detached ADU Size Limits
- –Maximum size of a detached ADU is 66% of the principal dwelling’s total floor area.
Max Units
- –1 ADU per lot for single-family detached (may be attached or detached).
Owner Occupancy
- –Owner occupancy not required
Parking
- –No ADU parking minimum or maximum stated; Downtown districts have no minimum off-street parking for uses (including ADUs).
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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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.
Greene County