521 S Holden St, Seattle, WA 98108

Small-Bay Industrial · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: industrial warehouse. AI estimate from public imagery. In recent public imagery (2026-06), the building appears serviceable with visible wear. AI estimate from public imagery; may be outdated.

One of 1,229 reachable small-bay industrial buildings in Seattle. Larger than 9% of small-bay industrial buildings in Seattle (median 14,469 SF), derived from assessor records.

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Building size: 4,000 SF, King County Assessor
Lot size: 8,780 SF, King County Assessor
Year built: 1958, King County Assessor
Stories: 1, King County Assessor
Predominant use: Industrial Bldg., King County Assessor
Assessed value: $671,900, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $167.98/SF, derived from assessor records
Lot coverage: 46%, derived from assessor records
Vintage: 1950s vintage
Zoning: MML U/85, King County
County use code: Industrial(Gen Purpose)
Construction (observed): metal, AI estimate from public imagery
Parking (observed): surface lot, AI estimate from public imagery

Nearby comparable buildings

Same building type, by distance. Assessor facts only; not an opinion of value.

533 S Holden St, Seattle · 0 mi · 5,600 SF · built 1957 · assessed $167.96/SF
500 S Portland St, Seattle · 0 mi · 80,531 SF · built 1970 · assessed $118.38/SF
530 S Holden St, Seattle · 0 mi · 4,846 SF · built 1958 · assessed $211.78/SF
7600 5th Ave S, Seattle · 0 mi · 53,686 SF · built 1967 · assessed $164.39/SF
7701 5th Ave S, Seattle · 0 mi · 3,725 SF · built 1955 · assessed $391.01/SF
540 S Holden St, Seattle · 0.1 mi · 14,049 SF · built 1964 · assessed $127.21/SF

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Sale history and market context

MakeMe Estimate: $1,087,099 (estimated market value), with a likely range of $763,406 to $1,203,963 (half of recent verified sales in this segment landed inside that range). Based on 86 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 1999-11-30 for $225,000 (recorded arm's-length sale).

Current ownership dates to 2021 (about 5 years) per recorded transfers.

2021-06-18: $150,000 from Private party to Private party (non-market transfer), rec. 20210624002412

1999-11-30: $225,000 from Private party to Private party, rec. 19991201001941

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 $288,700 (2011) to $671,900 (2026), up 133% over 15 years, per county tax rolls. The 2026 roll splits $671,900 into $504,800 land and $167,100 improvements.

Zoning: MML U/85 (per King County)

Lot: 8,780 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Industrial Light Manufacturing 4,000 SF (county building sections)

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