ADUs are allowed in Pe EllTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Pe Ell, WA
Is your property eligible for an ADU?
# of Properties
476
Owner-occupied
20%
Zoning districts
2
Avg Home Value
$200,817
Median Lot Size
0.23 acres
Avg Income
$62,570
Residential Types:
476 housing units
Single Family
48%
Other
52%
Zoning Districts:
17 parcels · 2 districts
RDD-5
82%(14)
ARL
18%(3)
ADU Rules
What can you build in Pe Ell, WA?
Pe Ell, WA 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
Detached ADU Size Limits
- –Maximum detached ADU size is 20% of the lot area.
- –In residential districts, maximum detached ADU size is 35% of the main building’s gross floor area.
- –With an administrative variance, the 20% of lot area limit for a detached ADU may increase by up to 10%.
- –With an administrative variance in residential districts, the 35% of main building floor area limit for a detached ADU may increase by up to 10%.
Max Units
- –Single-family lots: 0 ADUs per lot.
- –Duplex and multifamily lots: none specified.
Parking
- –2 spaces/ADU; no max stated. Off-street parking required when creating or adding dwelling units; the mayor may reduce the minimum for joint/mixed-use or if on-street parking is sufficient; up to 25% of required spaces may be within 300 feet of the use.
ADU State Law
What can you build in Washington?
- –ADUs are allowed by right, including attached, internal, and detached ADUs.
- –Local governments must allow up to two ADUs per lot.
- –Maximum ADU size is 1,000 sq ft for both attached and detached units.
- –ADU height is limited to 24 ft or the height of the principal dwelling, whichever is less.
- –Setbacks must use the less restrictive of accessory structure or principal dwelling standards.
- –Lot coverage and yard coverage rules may not be more restrictive than those applied to the principal home.
- –Parking requirements are capped, and parking cannot be required within ½ mile of major transit.
- –Owner occupancy may not be required for ADUs.
- –ADUs may be rented long-term or sold separately; local short-term rental rules may still apply.
- –Local governments may not regulate ADUs more restrictively than the principal unit. This includes setbacks, yard coverage, lot coverage, and height.
- –Cities and counties may be more permissive, but not more restrictive, than Washington's state ADU standards.
- –Some zoning rules still come from local code. Standards like FAR, bulk limits, and general lot coverage continue to apply as long as they do not prevent the lot from meeting the state-required ADU entitlements (e.g., allowing two ADUs with the required dimensions).
- –Washington's statewide ADU mandates apply only within Urban Growth Areas.
- –Outside UGAs, local zoning controls whether ADUs are allowed and under what conditions.
- –Additional constraints often apply outside UGAs, including septic capacity, fire access, water availability, and environmental regulations.
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 Washington municipalities
Rules change at the town line. Check the municipality your property is actually in.
Lewis County