500 Boren Ave N, Seattle, WA 98170

Office · Seattle · Seattle-Bellevue metro, WA

One of 957 reachable office buildings in Seattle. Larger than 88% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 271,071 SF, King County Assessor
Lot size: 49,198 SF, King County Assessor
Year built: 2009, King County Assessor
Stories: 5, King County Assessor
Predominant use: Amazon Phase 2 (Fiona Building), King County Assessor
Assessed value: $65,667,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $242.25/SF, derived from assessor records
Lot coverage: 551%, derived from assessor records
Vintage: 2000s vintage
Zoning: SM-SLU 175/85-280, King County
County use code: Office Building

Nearby comparable buildings

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

551 Boren Ave N, Seattle · 0 mi · 438,093 SF · built 2010 · assessed $136.25/SF
501 Fairview Ave N, Seattle · 0.1 mi · 422,274 SF · built 2016 · assessed $215.61/SF
530 Fairview Ave N, Seattle · 0.1 mi · 129,093 SF · built 2008 · assessed $625/SF
500 Fairview Ave N, Seattle · 0.1 mi · 167,201 SF · built 2015 · assessed $536.56/SF
535 Terry Ave N, Seattle · 0.1 mi · 184,482 SF · built 2009 · assessed $230.02/SF
440 Terry Ave N, Seattle · 0.1 mi · 508,139 SF · built 2009 · assessed $149.77/SF

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Sale history and market context

MakeMe Estimate: $64,636,611 (estimated market value), with a likely range of $58,415,475 to $84,218,445 (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: 2012-12-21 for $110,233,937 (recorded arm's-length sale).

Current ownership dates to 2012 (about 14 years) per recorded transfers.

2012-12-21: $110,233,937 from City Place II LLC to Acorn Development LLC, rec. 20121221001325

4 administrative transfers (no consideration), 2007 to 2009

2000-11-08: $7,857,600 from Savage Wholesale Building Materials INC to City Investors XI LLC (part of a 3-parcel sale; price is the whole deal), rec. 20001115000751

1999-04-28: transfer from CMC Heartland Partners to Savage Wholesale BLDG Materials INC (non-market transfer), rec. 199905070896

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 $45,674,000 (2011) to $65,667,000 (2026), up 44% over 15 years, per county tax rolls. The 2026 roll splits $65,667,000 into $46,738,100 land and $18,928,900 improvements.

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

Lot: 49,198 sq ft

Site notes: Contamination noted

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 158,333 SF; Underground Parking Structure 98,700 SF; Retail Store 14,038 SF (county building sections)

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

Permit history

2025-02-18: Remodel, declared value $450,000 (Screened), permit 7060375-CN

2024-12-05: Electrical, declared value $140,000 (Screened), permit 7059605-EL

2024-10-22: Remodel, declared value $184,100 (Screened), permit 7051922-CN

2022-10-27: Remodel (Screened), permit 6930167-CN

2017-07-16: Remodel, declared value $109,059 (Screened), permit 6585080

2011-01-25: Remodel, declared value $1,043,820 (Complete), permit 6263027

2009-04-07: Building, New, declared value $38,999,203 (Complete), permit 6142495

2009-03-17: Remodel, declared value $9,900,000 (Complete), permit 6207457

2009-03-05: Remodel, declared value $9,078,288 (Complete), permit 6207455

2008-12-22: Building, New, declared value $4,592,078 (Complete), permit 6178141

Source: King County permit records (newest first).