ADUs are allowed in SidneyTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Sidney, OH
Is your property eligible for an ADU?
# of Properties
8,949
Owner-occupied
55%
Zoning districts
13
Avg Home Value
$122,849
Median Lot Size
0.18 acres
Avg Income
$70,563
Residential Types:
8,949 housing units
Other
100%
Zoning Districts:
10,863 parcels · 13 districts
R-1
57%(6,184)
TND
16%(1,761)
R-3
7%(789)
R-2
7%(728)
Other
13%(1,401)
ADU Rules
What can you build in Sidney, OH?
Sidney, 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 ADU size: up to one-third of the principal dwelling’s total floor area; in multi‑story homes, it may instead be up to the first‑floor area but not more than 50% of total floor area (principal dwelling must be at least 1,000 sq ft).
Detached ADU Size Limits
- –Maximum size of 800 sq ft
Max Units
- –TND: 1 ADU per lot; All other zones: 0 ADUs per lot.
Owner Occupancy
- –Owner must reside in either the principal or ADU
Parking
- –0 spaces/ADU if principal dwelling's parking is met; otherwise 1 space; exemptions: abutting ROW with on-street parking or within 1,000 ft of a public parking facility have no off-street requirement; off-site spaces within 600 ft may count via easement.
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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Learn the key rules and size limits for ADUs