605 1st Ave, Seattle, WA 98104
Office · Seattle · Seattle-Bellevue metro, WA
Imagery suggests: historic mixed-use building, appears multi-tenant. 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 AI estimate from public imagery; may be outdated.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 957 reachable office buildings in Seattle. Larger than 68% of office buildings in Seattle (median 20,410 SF), derived from assessor records.
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Claim or manage this building- Building size
- 56,700 SF, King County Assessor
- Lot size
- 8,100 SF, King County Assessor
- Year built
- 1900, King County Assessor
- Stories
- 6, King County Assessor
- Predominant use
- Mutual Life Building, King County Assessor
- Assessed value
- $11,052,200, per the King County Assessor (not a market appraisal)
- Assessed value per building SF
- $194.92/SF, derived from assessor records
- Lot coverage
- 700%, derived from assessor records
- Vintage
- pre-war vintage
- Zoning
- PSM 100/100-130, King County
- County use code
- Office Building
- Construction (observed)
- masonry, AI estimate from public imagery
- Parking (observed)
- street only, AI estimate from public imagery
- Frontage (observed)
- corner, AI estimate from public imagery
Nearby comparable buildings
Same building type, by distance. Assessor facts only; not an opinion of value.
- 100 1st Ave S, Seattle · 0 mi · 54,390 SF · built 1985 · assessed $140.10/SF
- 600 1st Ave, Seattle · 0 mi · 89,355 SF · built 1900 · assessed $131.79/SF
- 104 1st Ave S, Seattle · 0 mi · 36,330 SF · built 1902 · assessed $137.16/SF
- 614 1st Ave, Seattle · 0 mi · 25,492 SF · built 1902 · assessed $163.36/SF
- 95 Yesler Way, Seattle · 0 mi · 6,923 SF · built 1900 · assessed $98.86/SF
- 112 1st Ave S, Seattle · 0 mi · 18,160 SF · built 1906 · assessed $137.63/SF
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