960 Republican St, Seattle, WA 98109

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: mid-rise mixed-use, appears multi-tenant. 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 AI estimate from public imagery; may be outdated.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 69% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 60,375 SF, King County Assessor
Lot size: 20,584 SF, King County Assessor
Year built: 1928, King County Assessor
Stories: 3, King County Assessor
Predominant use: Office And Laboratories, King County Assessor
Assessed value: $44,570,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $738.22/SF, derived from assessor records
Lot coverage: 293%, derived from assessor records
Vintage: pre-war vintage
Zoning: SM-SLU 175/85-280, King County
County use code: Office Building
Construction (observed): masonry, AI estimate from public imagery
Parking (observed): structured, AI estimate from public imagery
Frontage (observed): interior, AI estimate from public imagery

Nearby comparable buildings

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

530 Westlake Ave N, Seattle · 0 mi · 512,665 SF · built 2021 · assessed $235.36/SF
535 Terry Ave N, Seattle · 0 mi · 184,482 SF · built 2009 · assessed $230.02/SF
428 Westlake Ave N, Seattle · 0.1 mi · 144,282 SF · built 2004 · assessed $228.52/SF
401 Terry Ave N, Seattle · 0.1 mi · 258,505 SF · built 2003 · assessed $281.44/SF
901 Mercer St, Seattle · 0.1 mi · 593,200 SF · built 2013 · assessed $144.66/SF
551 Boren Ave N, Seattle · 0.1 mi · 438,093 SF · built 2010 · assessed $136.25/SF

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Sale history and market context

MakeMe Estimate: $33,508,285 (estimated market value), with a likely range of $32,630,495 to $44,273,678 (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: 2015-08-28 for $40,988,675 (recorded arm's-length sale).

Current ownership dates to 2015 (about 11 years) per recorded transfers.

2015-08-28: $40,988,675 from Lake Union I LLC to Urg 960 Reublican LLC, rec. 20150828000707

3 administrative transfers (no consideration), 1996 to 2010

1994-11-04: $2,750,000 from Private party to Private party (part of a 2-parcel sale; price is the whole deal), rec. 199411041997

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 $16,627,200 (2011) to $44,570,000 (2026), up 168% over 15 years, per county tax rolls. The 2026 roll splits $44,570,000 into $19,554,800 land and $25,015,200 improvements.

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

Lot: 20,584 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Laboratories 44,052 SF; Basement, Office 16,323 SF (county building sections)

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

Permit history

2021-01-20: Remodel, declared value $100,000 (Complete), permit 6817083-CN

2018-12-04: Remodel, declared value $70,000 (Screened), permit 6702290-CN

2018-10-23: Remodel, declared value $3,771,373 (Screened), permit 6646967-CN

2002-04-16: Building, New, declared value $7,500,000 (Complete), permit 727246

2000-12-29: Remodel, declared value $450,000 (Screened), permit 718037

1999-08-18: Remodel, declared value $175,000 (Complete), permit 708312

1999-05-21: Remodel, declared value $37,500 (Complete), permit 706311

1999-04-26: Remodel, declared value $1,000,000 (Complete), permit 705763

1999-03-23: Remodel, declared value $4,900,000 (Complete), permit 705062

1999-02-24: Remodel, declared value $480,000 (Complete), permit 704529

Source: King County permit records (newest first).