6421 15th Ave NW, Seattle, WA 98107

Office · Seattle · Seattle-Bellevue metro, WA

One of 957 reachable office buildings in Seattle. Larger than 25% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 5,770 SF, King County Assessor
Lot size: 5,234 SF, King County Assessor
Year built: 2000, King County Assessor
Stories: 3, King County Assessor
Predominant use: Retail/Office, King County Assessor
Assessed value: $2,575,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $446.27/SF, derived from assessor records
Lot coverage: 110%, derived from assessor records
Vintage: 2000s vintage
Zoning: NC3P-55 (M), King County
County use code: Office Building
Parking (observed): structured, 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.

6525 15th Ave NW, Seattle · 0.1 mi · 4,466 SF · built 1989 · assessed $360.12/SF
5803 15th Ave NW, Seattle · 0.3 mi · 4,527 SF · built 1963 · assessed $568.50/SF
7011 15th Ave NW, Seattle · 0.3 mi · 2,695 SF · built 1935 · assessed $403.56/SF
5600 14th Ave NW, Seattle · 0.4 mi · 4,112 SF · built 1951 · assessed $480.62/SF
1448 NW Market St, Seattle · 0.4 mi · 279,102 SF · built 2019 · assessed $156.18/SF
6204 8th Ave NW, Seattle · 0.4 mi · 2,180 SF · built 1947 · assessed $445.28/SF

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Sale history and market context

MakeMe Estimate: $2,506,886 (estimated market value), with a likely range of $2,441,215 to $3,312,287 (half of recent verified sales in this segment landed inside that range). Based on 185 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2021-07-29 for $2,600,000 (recorded arm's-length sale).

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

2021-07-29: $2,600,000 from Midway Inn Corporation to Grand Star INC, rec. 20210802000464

2017-04-04: $2,300,000 from Great Lake Investment Corporation to Midway Inn Corporation, rec. 20170412001948

2014-10-14: $1,700,000 from Excel Chae LLC to Great Lake Investment Corporation, rec. 20141015001201

3 administrative transfers (no consideration), 1993 to 2006

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 $1,245,000 (2011) to $2,575,000 (2026), up 107% over 15 years, per county tax rolls. The 2026 roll splits $2,575,000 into $1,282,300 land and $1,292,700 improvements.

Zoning: NC3P-55 (M) (per King County)

Lot: 5,234 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 3,124 SF; Retail Store 2,646 SF (county building sections)

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