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What Are You Allowed to Build at 1209 Mercer St, Seattle, WA, 98109?

Backyard Cottage

(Detached ADU)

Probably Not Allowed

This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority

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 42,930 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 34,197 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

2467400210

Property Type

Multi Family

Zone

SM-SLU

Year Built

1966

Lot Size

9,539 sq ft

Gross Building Area

8,733 sq ft

Gross Floor Area

8,733 sq ft

Estimated

Living Area

8,733 sq ft

Basement Area

0 sq ft

Impervious Surface

8,733 sq ft

Estimated

91.5%of lot coverage

ADU rules for Seattle, WA

Based on public data and AI. Check with a pro. Read More