ADUs are allowed in MolallaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Molalla, OR
Is your property eligible for an ADU?
# of Properties
3,170
Owner-occupied
69%
Zoning districts
9
Avg Home Value
$523,576
Median Lot Size
0.16 acres
Avg Income
$96,077
Residential Types:
3,170 housing units
Single Family
90%
2-3 Family
3%
Apts (4+ units)
3%
Other
4%
Zoning Districts:
3,258 parcels · 9 districts
R-1
58%(1,894)
R-3
16%(518)
R-2
12%(393)
C1
6%(194)
Other
8%(259)
ADU Rules
What can you build in Molalla, OR?
Molalla, 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 800 sq ft
- –Maximum size of 40% of the primary dwelling’s floor area
Detached ADU Size Limits
- –Maximum ADU size of 800 sq ft
- –Maximum ADU size of 40% of the primary dwelling’s floor area
Max Units
- –1 ADU per legal lot (single-family); duplex/multifamily: none specified
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space/ADU (1 total for the primary dwelling and the ADU); no minimum in C-1; max = min required × 1.2 if adjacent on-street parking, or ×1.5 if no adjacent on-street parking (or per parking-demand analysis); reductions: −1 space for every 2 adjacent on-street spaces; transit-related reductions up to 20%; shared parking allowed.
Rental Restrictions
- –Short-term/vacation rentals effectively not allowed.
- –Bed & Breakfast Inns capped at 28 days; hotels/motels not permitted in residential zones.
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.
Clackamas County