ADUs are allowed in MonroeTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Monroe, OH
Is your property eligible for an ADU?
# of Properties
1,030
Owner-occupied
23%
Zoning districts
24
Avg Home Value
$438,138
Median Lot Size
0.40 acres
Avg Income
$98,906
Residential Types:
1,030 housing units
Single Family
13%
2-3 Family
5%
Apts (4+ units)
72%
Other
9%
Zoning Districts:
6,516 parcels · 24 districts
NC
60%(3,932)
SR
19%(1,246)
UR
6%(383)
DT
2%(154)
Other
12%(801)
ADU Rules
What can you build in Monroe, OH?
Monroe, OH 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 for an internal/attached ADU is the greater of 25% of the principal dwelling’s total floor area or 800 sq ft.
Detached ADU Size Limits
- –Maximum size for a detached ADU is the greater of 25% of the principal home’s total floor area or 800 sq ft.
- –As an accessory structure, a detached ADU’s building area cannot exceed the principal dwelling’s total floor area.
Owner Occupancy
- –No owner-occupancy requirement for ADUs.
Parking
- –1 space/ADU; max 1; ADU parking in addition to primary-use parking; min not required in DT; MU/DT not permitted
Rental Restrictions
- –ADU shall not be located on a lot where any short-term rental exists.
- –If used as a short-term rental, it must be the owner’s primary residence; owner absent → max 120 days/year; stays ≤30 days; non-owner-occupied STRs prohibited in RR/SR/NC/GR and must be 500 ft apart; Zoning Permit required.
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.
Warren County