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What Are You Allowed to Build at 310 21st Ave Unit C, Seattle, WA, 98122?

Backyard Cottage

(Detached ADU)

Might be Allowed

This property may qualify for a Detached ADU of up to 399 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

In Home Apartment

(Conversion or Addition)

Probably Allowed

This property meets the requirements for an Internal ADU of up to 1,000 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Probably Allowed

This property likely meets the zoning requirements to build a swimming pool. Based on applicable zoning limits, the estimated buildable area for a pool. Final feasibility may depend on site-specific conditions and local interpretation.

Single Family

Probably Allowed

This property likely meets the zoning requirements to build a Single-Family home up to 1,819 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multi Family

Home Addition

Probably Allowed

We estimate you can expand this property by up to 399 sq ft under current zoning rules. This may allow for a horizontal addition, a vertical addition, or both, depending on design and permitting.

Property facts

Zoning Jurisdiction

SEATTLE

Parcel ID

9126100767

Property Type

Residential

Zone

LR2

Year Built

2015

Lot Size

1,653 sq ft

Gross Building Area

507 sq ft

Gross Floor Area

1,420 sq ft

Estimated

Living Area

1,420 sq ft

Basement Area

0 sq ft

Impervious Surface

507 sq ft

Estimated

30.7%of lot coverage

ADU rules for Seattle, WA

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