505 Madison St, Seattle, WA 98104
Office · Seattle · Seattle-Bellevue metro, WA
Imagery suggests: high-rise office, 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 AI estimate from public imagery; may be outdated.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 98% of office buildings in Seattle (median 20,410 SF), derived from assessor records.
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Claim or manage this building- Building size
- 990,000 SF, King County Assessor
- Lot size
- 14,160 SF, King County Assessor
- Year built
- 2017, King County Assessor
- Stories
- 36, King County Assessor
- Predominant use
- 36-Story Class A+ Office, King County Assessor
- Assessed value
- $243,212,000, per the King County Assessor (not a market appraisal)
- Assessed value per building SF
- $245.67/SF, derived from assessor records
- Lot coverage
- 6992%, derived from assessor records
- Vintage
- 2010s vintage
- Zoning
- DOC1 U/450/U, King County
- County use code
- Office Building
- Construction (observed)
- steel glass, AI estimate from public imagery
- Parking (observed)
- street only, 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.
- 909 5th Ave, Seattle · 0 mi · 777,268 SF · built 1973 · assessed $170.21/SF
- 800 5th Ave, Seattle · 0.1 mi · 1,216,017 SF · built 1981 · assessed $169.51/SF
- 925 4th Ave, Seattle · 0.1 mi · 1,052,469 SF · built 2002 · assessed $200.93/SF
- 1001 4th Ave, Seattle · 0.1 mi · 1,179,473 SF · built 1969 · assessed $168.46/SF
- 711 6th Ave, Seattle · 0.1 mi · 1,195,387 SF · built 1990
- 904 7th Ave, Seattle · 0.1 mi · 306,490 SF · built 2008 · assessed $274.84/SF
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