ADUs are allowed in AshlandTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Ashland, OR
Is your property eligible for an ADU?
# of Properties
9,071
Owner-occupied
58%
Zoning districts
31
Avg Home Value
$507,869
Median Lot Size
0.18 acres
Avg Income
$75,660
Residential Types:
9,071 housing units
Single Family
84%
2-3 Family
2%
Apts (4+ units)
2%
Other
12%
Zoning Districts:
9,764 parcels · 31 districts
R-1-7.5
22%(2,158)
R-1-5
22%(2,153)
R-2
16%(1,568)
R-1-10
10%(931)
Other
30%(2,954)
ADU Rules
What can you build in Ashland, OR?
Ashland, 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 internal/attached ADU size by zone: R-1, R-1-3.5, RR, WR, NN = min(1,000 sq ft, 50% of the principal dwelling’s habitable floor area); R-2/R-3 = min(500 sq ft, 50% of the principal dwelling’s habitable floor area); NM = 750 sq ft.
Detached ADU Size Limits
- –Maximum detached ADU size by zone: min(50% of the primary dwelling’s habitable area, 1,000 sq ft) in R-1, R-1-3.5, RR, WR, and NN; min(50% of the primary dwelling’s habitable area, 500 sq ft) in R-2 and R-3; 750 sq ft in NM zones (500 sq ft if over a detached accessory building).
Max Units
- –1 ADU per single-family lot; 0 ADUs on duplex lots; 0 ADUs on multifamily lots
Parking
- –0 spaces minimum; no maximum; off-street parking optional; ADUs exempt from bicycle parking and from certain parking/construction standards (voluntary parking must meet design standards).
Rental Restrictions
- –Short-term rentals allowed only as travelers’ accommodations in R-2/R-3 with CUP, business license, and transient occupancy tax; not allowed in other zones. ADUs cannot be approved as accessory travelers’ accommodations (kitchen facilities not 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.
Jackson County