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What Are You Allowed to Build at 401 Mercer St, Seattle, WA, 98109?

Backyard Cottage

(Detached ADU)

Probably Allowed

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

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

Might be Allowed

This property may meet the zoning requirements to build a swimming pool. Some factors may affect feasibility. 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.

Multi Family

Home Addition

Might be Allowed

The property may meet the zoning requirements to build a Home Addition of zoning-counted floor area. Additional factors may affect feasibility.

Property facts

Zoning Jurisdiction

SEATTLE

Parcel ID

1988200705

Property Type

Utility, Private(Radio/T.V.)

Zone

SM-UP

Year Built

1986

Lot Size

88,909 sq ft

Gross Building Area

66,240 sq ft

Gross Floor Area

52,023 sq ft

Estimated

Living Area

37,807 sq ft

Basement Area

0 sq ft

Impervious Surface

37,807 sq ft

Estimated

42.5%of lot coverage

ADU rules for Seattle, WA

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