ADUs are allowed in DundeeTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Dundee, OR
Is your property eligible for an ADU?
# of Properties
1,168
Owner-occupied
76%
Zoning districts
17
Avg Home Value
$548,468
Median Lot Size
0.21 acres
Avg Income
$104,405
Residential Types:
1,168 housing units
Single Family
90%
2-3 Family
4%
Apts (4+ units)
2%
Other
4%
Zoning Districts:
1,242 parcels · 17 districts
R-1
52%(644)
R-2
19%(239)
R-3
14%(178)
CBD
6%(75)
Other
9%(106)
ADU Rules
What can you build in Dundee, OR?
Dundee, 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 size of 900 sq ft or 50% of the primary dwelling’s floor area, whichever is smaller; interior full-level conversions may exceed 900 sq ft and occupy the whole level.
Detached ADU Size Limits
- –Maximum of 900 sq ft or 50% of the primary dwelling's floor area, whichever is smaller.
Max Units
- –Duplex/multifamily: 0 ADUs per lot
Owner Occupancy
- –Owner occupancy not required.
Parking
- –No ADU-specific requirement; set case-by-case by planning official (similar use or demand analysis).
Rental Restrictions
- –Short-term rentals (<28 days) prohibited for ADUs; long-term rentals permitted
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