BuildabilitySeattle, Washington · pop. 741,440
What can you build in Seattle?
Type an address in Seattle, WA. Zoning context, flood, seismic, soil, radon, wildfire, utilities, and the sources behind each finding, in about twenty seconds.
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Local authority
How to verify zoning in Seattle.
Seattle zoning is administered under Title 23 of the Municipal Code, with the Land Use Code split between the base zone and any overlay — shoreline, historic district, or urban village — that applies on top of it. Read the base zone for permitted uses and development standards, then check the overlay layers, because in Seattle the overlay is usually what constrains height and setbacks rather than the base zone.
Sources 4
- MapCurrent Land Use Zoning Detail (GIS service) (opens in a new tab)
City of Seattle
The authoritative published zoning layer; this is the service our zoning read queries.
- CodeSeattle Municipal Code (Title 23 Land Use Code) (opens in a new tab)
City of Seattle
Check recently passed ordinances not yet codified before relying on the hosted text.
- PermitsPermits (opens in a new tab)
Seattle SDCI
- ContactContact Us (opens in a new tab)
Seattle SDCI
Official determination: The Seattle Department of Construction and Inspections (SDCI) is the authority for official zoning interpretations and permit decisions.
How it works
Available data, one preliminary view.
Buildability geocodes the address, queries available flood, seismic, soil, radon, wildfire, and zoning context, and runs the published Buildability Score. Reports name the sources used and the items that still need local verification.
Building in Seattle, WA.
Does Buildability make the official zoning decision in Seattle?
No. Buildability organizes preliminary property context and links to local evidence.
What does the Buildability Score measure?
The preliminary score considers nine factors: zoning, flood, seismic, soil, radon, wildfire, utilities, terrain, and lot geometry. Availability and depth vary by address and source; City of Seattle remains the local authority for project-specific decisions.
Start a property check in Seattle.
The live Score is free on any address. The full report is $99, and reports never expire.
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Buildability Scores are an informational planning estimate from public data — not an appraisal, engineering opinion, or official zoning determination. Verify with your local jurisdiction before making a decision. Terms.