4000 6th Ave NW, Seattle, WA 98107

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 well maintained. AI estimate from public imagery; may be outdated.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: 3,925 SF, King County Assessor
Lot size: 3,393 SF, King County Assessor
Year built: 1926, King County Assessor
Stories: 4, King County Assessor
Predominant use: Warehouse & 3 Level Apartment, King County Assessor
Assessed value: $1,634,700, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $416.48/SF, derived from assessor records
Lot coverage: 116%, derived from assessor records
Vintage: pre-war vintage
Zoning: MML U/65, King County
County use code: Warehouse
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.

600 NW 40th St, Seattle · 0 mi · 16,000 SF · built 1987 · assessed $243.53/SF
4020 6th Ave NW, Seattle · 0 mi · 2,136 SF · built 1958 · assessed $472.24/SF
4101 Leary Way NW, Seattle · 0.1 mi · 2,260 SF · built 1984 · assessed $282.52/SF
4020 Leary Way NW, Seattle · 0.1 mi · 18,084 SF · built 1995 · assessed $225.71/SF
4121 6th Ave NW, Seattle · 0.1 mi · 15,143 SF · built 1945 · assessed $200.92/SF
700 NW 42nd St, Seattle · 0.1 mi · 28,844 SF · built 1999 · assessed $168.67/SF

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Sale history and market context

MakeMe Estimate: $2,019,959 (estimated market value), with a likely range of $1,741,866 to $2,253,539 (half of recent verified sales in this segment landed inside that range). Based on 96 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2017-03-29 for $1,599,800 (recorded arm's-length sale).

Current ownership dates to 2017 (about 9 years) per recorded transfers.

2023-03-30: transfer from Nurburgring LLC to Seattle City of (.454%) (non-market transfer), rec. 20230501000618

2017-03-29: $1,599,800 from Private party to Nurburgring LLC, rec. 20170331000878

2 administrative transfers (no consideration), 1994 to 2011

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 $243,900 (2011) to $1,634,700 (2026), up 570% over 15 years, per county tax rolls. The 2026 roll splits $1,634,700 into $475,000 land and $1,159,700 improvements.

Zoning: MML U/65 (per King County)

Lot: 3,393 sq ft

Nuisance flags: Other nuisance

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Storage Warehouse 1,975 SF; Apartment 1,950 SF (county building sections)

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