ADUs are allowed in SheridanTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Sheridan, OR
Is your property eligible for an ADU?
# of Properties
1,502
Owner-occupied
70%
Zoning districts
11
Avg Home Value
$329,128
Median Lot Size
0.18 acres
Avg Income
$65,754
Residential Types:
1,502 housing units
Single Family
79%
2-3 Family
4%
Apts (4+ units)
3%
Other
14%
Zoning Districts:
1,687 parcels · 11 districts
R2
47%(789)
R1
22%(365)
R3
17%(293)
C
8%(141)
Other
6%(99)
ADU Rules
What can you build in Sheridan, OR?
Sheridan, OR 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 of 450 sq ft
- –Maximum ADU size of 40% of the primary dwelling’s gross floor area (attached garage area excluded by rule)
Detached ADU Size Limits
- –Maximum size of 450 sq ft of gross floor area
- –Maximum size of 40% of the primary dwelling’s gross floor area
Max Units
- –1 ADU per detached single-family dwelling (R-1, R-2, R-3, UT).
- –Duplex/multifamily: none specified.
Owner Occupancy
- –Owner must occupy the primary dwelling or the ADU.
Parking
- –2 spaces/ADU, in addition to primary dwelling; no max. Outside garage OK; paved surface & driveway access standards apply.
ADU State Law
What can you build in Oregon?
- –In urban growth areas, Oregon law requires cities and counties to allow at least one ADU on lots zoned for detached single-family homes.
- –Local jurisdictions cannot require owner occupancy for ADUs, but may regulate short-term or vacation rentals.
- –There are no statewide limits on ADU size, height, setbacks, lot size, or floor area ratio. Local zoning rules apply.
- –Parking requirements, if any, are set by the local jurisdiction, subject to state limitations.
- –Some cities may allow more than one ADU per lot, depending on local code.
- –Oregon law does not require counties to allow ADUs in rural residential zones. Whether an ADU is allowed depends on county zoning.
- –ADUs in rural residential areas cannot be used for short-term or vacation rentals.
- –Additional requirements may apply related to wildfire risk, water supply, septic capacity, and fire access.
- –Counties may impose additional restrictions beyond state law or choose not to allow ADUs at all.
- –If a county allows ADUs, state law imposes strict limits, including a minimum 2-acre lot size, a maximum ADU size of 900 sq ft, a location within 100 ft of the primary dwelling, and a limit of one ADU per parcel.
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 Oregon municipalities
Rules change at the town line. Check the municipality your property is actually in.
Yamhill County