500 Fairview Ave N, Seattle, WA 98109

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: modern office building. 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 AI estimate from public imagery; may be outdated.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 957 reachable office buildings in Seattle. Larger than 82% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 167,201 SF, King County Assessor
Lot size: 21,240 SF, King County Assessor
Year built: 2015, King County Assessor
Stories: 7, King County Assessor
Predominant use: Biotech Office Building, King County Assessor
Assessed value: $89,714,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $536.56/SF, derived from assessor records
Lot coverage: 787%, derived from assessor records
Vintage: 2010s vintage
Zoning: SM-SLU 175/85-280, King County
County use code: Office Building
Construction (observed): masonry, AI estimate from public imagery
Parking (observed): none visible, AI estimate from public imagery

Nearby comparable buildings

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

501 Fairview Ave N, Seattle · 0 mi · 422,274 SF · built 2016 · assessed $215.61/SF
530 Fairview Ave N, Seattle · 0 mi · 129,093 SF · built 2008 · assessed $625/SF
400 Fairview Ave N, Seattle · 0.1 mi · 536,697 SF · built 2015 · assessed $264.15/SF
500 Boren Ave N, Seattle · 0.1 mi · 271,071 SF · built 2009 · assessed $242.25/SF
551 Boren Ave N, Seattle · 0.1 mi · 438,093 SF · built 2010 · assessed $136.25/SF
1260 Mercer St, Seattle · 0.1 mi · 177,851 SF · built 2000 · assessed $197.30/SF

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Sale history and market context

MakeMe Estimate: $84,679,484 (estimated market value), with a likely range of $76,529,264 to $110,333,360 (half of recent verified sales in this segment landed inside that range). Based on 12 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2008-01-28 for $3,900,000 (recorded arm's-length sale).

Current ownership dates to 2008 (about 18 years) per recorded transfers.

2014-12-19: transfer from Nelchina Point Limited Partnership to Seattle City of (non-market transfer), rec. 20150113000318

2008-01-28: $3,900,000 from Nelchina Point LTD Partnership to BMR 500 Fairview Avenue LLC, rec. 20080128000090

2005-01-14: $5,700,000 from Uan LLC+Msi Triangle LLC to Nelchina Point Limited Partnership, rec. 20050114000254

2003-03-27: $4,800,000 from 500 Fairview LLC to Uan LLC+Msi Triangle LLC, rec. 20030327002474

1999-06-10: $3,350,000 from Youasa Funashoku CO LTD to Private party, rec. 19990622002420

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 $3,528,400 (2011) to $89,714,000 (2026), up 2443% over 15 years, per county tax rolls. The 2026 roll splits $89,714,000 into $20,178,000 land and $69,536,000 improvements.

Zoning: SM-SLU 175/85-280 (per King County)

Lot: 21,240 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 63,174 SF; Underground Parking Structure 56,000 SF; Laboratories 46,862 SF; Retail Store 1,165 SF (county building sections)

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

Permit history

2025-11-07: Remodel, declared value $482,000, permit 7107210-CN

2025-10-17: Remodel, declared value $180,801, permit 7109596-CN

2025-08-28: Remodel, declared value $75,000, permit 7098166-CN

2024-05-31: Remodel, declared value $386,000 (Complete), permit 7017064-CN

2021-02-25: Remodel (Complete), permit 6822511-BK

2018-04-18: Remodel, declared value $2,240,936 (Complete), permit 6653502

2018-03-31: Remodel, declared value $1,998,600 (Complete), permit 6650428

2016-09-21: Remodel, declared value $2,100,000 (Complete), permit 6554832

2016-08-26: Remodel, declared value $2,300,000 (Complete), permit 6547668

2016-02-22: Remodel, declared value $1,099,140 (Complete), permit 6488331

Source: King County permit records (newest first).