ADUs are allowed in Cannon BeachTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Cannon Beach, OR
Is your property eligible for an ADU?
# of Properties
2,187
Owner-occupied
14%
Zoning districts
19
Median Lot Size
0.11 acres
Avg Income
$71,748
Residential Types:
2,187 housing units
Single Family
10%
2-3 Family
3%
Apts (4+ units)
1%
Other
86%
Zoning Districts:
2,421 parcels · 19 districts
R2
34%(831)
R1
23%(563)
RL
15%(367)
R3
9%(212)
Other
19%(448)
ADU Rules
What can you build in Cannon Beach, OR?
Cannon Beach, 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 for an internal/attached accessory dwelling unit is 600 sq ft.
Detached ADU Size Limits
- –Maximum size of 600 sq ft for a detached accessory dwelling unit (Cannon Beach §17.72.080(B)).
Max Units
- –Max 1 ADU per lot (attached or detached).
- –Single-family: 1; duplex/triplex/multifamily: 0.
- –Lots with a guest house: 0.
Owner Occupancy
- –Owner occupancy not required; ADU must be long-term rental.
Parking
- –1 space/ADU (plus 2 for primary unit); no max; ADU parking exempt from lot improvement standards; limited design standards
Rental Restrictions
- –ADUs may be rented only 30+ days; short-term/vacation rentals prohibited; annual notarized compliance statement required
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.
Clatsop County