23 S Massachusetts St, Seattle, WA 98134
Commercial · Seattle · Seattle-Bellevue metro, WA
Imagery suggests: corporate office building. AI estimate from public imagery. In recent public imagery (2026-06), the building appears well maintained. AI estimate from public imagery; may be outdated.
One of 1,256 reachable commercial buildings in Seattle. Larger than 82% of commercial buildings in Seattle (median 13,352 SF), derived from assessor records.
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Claim or manage this building- Building size
- 75,334 SF, King County Assessor
- Lot size
- 220,667 SF, King County Assessor
- Year built
- 2006, King County Assessor
- Stories
- 4, King County Assessor
- Buildings on parcel
- 4, King County Assessor
- Predominant use
- Office Building / Command Center, King County Assessor
- Assessed value
- $0, per the King County Assessor (not a market appraisal)
- Lot coverage
- 34%, derived from assessor records
- Vintage
- 2000s vintage
- Zoning
- MML U/85, King County
- County use code
- Governmental Service
- Construction (observed)
- steel glass, AI estimate from public imagery
- Parking (observed)
- surface lot, AI estimate from public imagery
- Frontage (observed)
- mid block, AI estimate from public imagery
Nearby comparable buildings
Same building type, by distance. Assessor facts only; not an opinion of value.
- 1561 Alaskan Way S, Seattle · 0.1 mi · 38,683 SF · built 1967
- 1530 1st Ave S, Seattle · 0.4 mi · 22,900 SF · built 1937 · assessed $277.06/SF
- 401 Alaskan Way S, Seattle · 0.4 mi · 177,623 SF · built 1967
- 2225 E Marginal Way S, Seattle · 0.4 mi · 90,500 SF · built 2003
- 1046 1st Ave S, Seattle · 0.5 mi · 168,449 SF · built 2005 · assessed $377.68/SF
- 1250 1st Ave S, Seattle · 0.5 mi · 1,718,000 SF · built 1999 · assessed $404.51/SF
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