

ADU rules for Fairfield
Accessory Dwelling Unit (ADU) Rules for Fairfield, OH
Is your property eligible for an ADU?
# of Properties
4,317
Owner-occupied
24%
Zoning districts
31
Avg Home Value
$288,426
Median Lot Size
0.03 acres
Avg Income
$77,413
Residential Types:
4,317 housing units
Single Family
3%
2-3 Family
3%
Apts (4+ units)
83%
Other
11%
Zoning Districts:
15,784 parcels · 31 districts
R1
40%(6,332)
R0
18%(2,842)
R4
10%(1,646)
R3
7%(1,169)
Other
24%(3,795)
ADU Rules
What can you build in Fairfield, OH?
Fairfield, OH follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
Owner Occupancy
- –No owner-occupancy restriction stated
Rental Restrictions
- –Detached ADU: short-term rentals prohibited in accessory structures.
- –Attached ADU: short-term rentals allowed only within the principal structure with limits (owner-occupancy if renting rooms; up to 5 renters total; max 2 per sleeping area; parking; no outdoor signs; services inside principal).
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 Ohio municipalities
Rules change at the town line. Check the municipality your property is actually in.
Butler County