1051 S Sullivan St, Seattle, WA 98108

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: other cre. 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 AI estimate from public imagery; may be outdated.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 2% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 2,486 SF, King County Assessor
Lot size: 6,000 SF, King County Assessor
Year built: 1956, King County Assessor
Stories: 1, King County Assessor
Predominant use: 4 Plex, King County Assessor
Units: 4, King County Assessor
Assessed value: $724,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $291.23/SF, derived from assessor records
Lot coverage: 41%, derived from assessor records
Vintage: 1950s vintage
Zoning: RSL (M), King County
County use code: 4-Plex
Construction (observed): masonry, 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.

8501 12th Ave S, Seattle · 0 mi · 3,109 SF · built 1956 · assessed $233.84/SF
1044 S Cloverdale St, Seattle · 0 mi · 5,504 SF · built 1975 · assessed $267.08/SF
1056 S Sullivan St, Seattle · 0 mi · 2,600 SF · built 1901 · assessed $252.69/SF
8609 12th Ave S, Seattle · 0.1 mi · 4,284 SF · built 1957 · assessed $272.88/SF
1201 S Cloverdale St, Seattle · 0.1 mi · 11,340 SF · built 1957 · assessed $345.41/SF
1024 S Cloverdale St, Seattle · 0.1 mi · 3,310 SF · built 1962 · assessed $268.58/SF

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Sale history and market context

MakeMe Estimate: $832,021 (estimated market value), with a likely range of $738,574 to $949,104 (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 $208K per unit at the midpoint (4 units).

Last sold: 2016-12-12 for $460,000 (recorded arm's-length sale).

Current ownership dates to 2016 (about 10 years) per recorded transfers.

2016-12-12: $460,000 from Private party to Private party, rec. 20161215001361

2005-11-21: transfer from Private party to Private party (non-market transfer), rec. 20051206000187

2005-11-10: $390,000 from Private party to Private party (part of a 2-parcel sale; price is the whole deal), rec. 20051114001168

2005-11-09: transfer from Private party to Private party (non-market transfer), rec. 20051114001167

2003-12-15: $234,000 from Private party to Mondo Investments LLC (part of a 2-parcel sale; price is the whole deal), rec. 20031222001395

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 $276,000 (2011) to $724,000 (2026), up 162% over 15 years, per county tax rolls. The 2026 roll splits $724,000 into $210,000 land and $514,000 improvements.

Zoning: RSL (M) (per King County)

Lot: 6,000 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Floor and use mix: Multiple Residence (Low Rise) 2,486 SF (county building sections)

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