900 E Prospect St, Seattle, WA 98102

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: low-rise apartments, 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 AI estimate from public imagery; may be outdated.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 5,391 reachable multifamily buildings in Seattle. Larger than 52% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 9,992 SF, King County Assessor
Lot size: 10,000 SF, King County Assessor
Year built: 1955, King County Assessor
Stories: 2, King County Assessor
Predominant use: Adamson Apartments, King County Assessor
Units: 21, King County Assessor
Assessed value: $4,379,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $438.25/SF, derived from assessor records
Lot coverage: 100%, derived from assessor records
Vintage: 1950s vintage
Zoning: LR3 (M), King County
County use code: Apartment
Construction (observed): masonry, AI estimate from public imagery
Parking (observed): none visible, 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.

1121 Broadway E, Seattle · 0 mi · 9,248 SF · built 1909 · assessed $297.25/SF
1101 10th Ave E, Seattle · 0 mi · 6,468 SF · built 1953 · assessed $411.56/SF
938 10th Ave E, Seattle · 0.1 mi · 5,825 SF · built 1953 · assessed $311.24/SF
1006 E Prospect St, Seattle · 0.1 mi · 4,266 SF · built 1904 · assessed $367.09/SF
956 10th Ave E, Seattle · 0.1 mi · 14,932 SF · built 1930 · assessed $293.60/SF
1132 10th Ave E, Seattle · 0.1 mi · 13,864 SF · built 1917 · assessed $330.14/SF

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Sale history and market context

MakeMe Estimate: $4,226,248 (estimated market value), with a likely range of $3,751,587 to $4,820,974 (half of recent verified sales in this segment landed inside that range). Based on 667 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works. About $201K per unit at the midpoint (21 units).

Last sold: 2018-10-11 for $5,445,800 (recorded arm's-length sale).

Current ownership dates to 2018 (about 8 years) per recorded transfers.

2018-10-11: $5,445,800 from Adamson Apartments LLC to Yasha LLC, rec. 20181012001249

2008-04-30: $3,387,900 from Chaney Real Estate LLC to Adamson Aparments LLC, rec. 20080501001643

2006-09-12: $2,300,000 from Adamson LLC to Ballard Crossing LLC, rec. 20060914000706

2003-12-04: transfer from Private party to Adamson LLC (non-market transfer), rec. 20031208001540

1984-10-09: $559,270 from Private party to Private party (part of a 3-parcel sale; price is the whole deal), rec. 198410170000

Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.

Value over time

Solid line: county appraised value per King County tax rolls. Shaded range: our modeled estimate for each year, built from recorded arm's-length sales in the building's segment; years without enough sales stay unmodeled. Dots: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $1,834,000 (2011) to $4,379,000 (2026), up 139% over 15 years, per county tax rolls. The 2026 roll splits $4,379,000 into $3,000,000 land and $1,379,000 improvements.

Zoning: LR3 (M) (per King County)

Lot: 10,000 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Multiple Residence (Low Rise) 9,992 SF (county building sections)

County districts report (schools, fire, sewer, council; on kingcounty.gov)