811 1st Ave, Seattle, WA 98104

Office · Seattle · Seattle-Bellevue metro, WA

One of 957 reachable office buildings in Seattle. Larger than 81% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 159,636 SF, King County Assessor
Lot size: 24,066 SF, King County Assessor
Year built: 1900, King County Assessor
Stories: 6, King County Assessor
Predominant use: Colman Building, King County Assessor
Assessed value: $20,609,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $129.10/SF, derived from assessor records
Lot coverage: 663%, derived from assessor records
Vintage: pre-war vintage
Zoning: DMC-170, King County
County use code: Historic Prop(Office)

Nearby comparable buildings

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

821 2nd Ave, Seattle · 0 mi · 384,302 SF · built 1929 · assessed $123.66/SF
83 Columbia St, Seattle · 0.1 mi · 46,620 SF · built 1914 · assessed $162.36/SF
801 2nd Ave, Seattle · 0.1 mi · 331,695 SF · built 1958 · assessed $206.97/SF
909 1st Ave, Seattle · 0.1 mi · 200,000 SF · built 1932
915 2nd Ave, Seattle · 0.1 mi · 861,221 SF · built 1973
620 Alaskan Way, Seattle · 0.1 mi · 112,560 SF · built 1910 · assessed $139.30/SF

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Sale history and market context

MakeMe Estimate: $19,238,001 (estimated market value), with a likely range of $17,386,385 to $25,066,205 (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: 2019-05-15 for $36,990,000 (recorded arm's-length sale).

Current ownership dates to 2024 (about 2 years) per recorded transfers.

2024-12-13: $9,500,000 from Unico Bop Coleman Building LLC to Coleman 811 1st Ave LLC (non-market transfer), rec. 20250117000262

2019-05-15: $36,990,000 from Colman Properties LP to Unico Bop Colman Building LLC, rec. 20190515001421

1997-06-27: $7,100,000 from Plaza Realty Holdings Corporation to Colman Properties LTD Partnership, rec. 199707010996

2 administrative transfers (no consideration), 1996 to 1996

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 $14,751,000 (2011) to $20,609,000 (2026), up 40% over 15 years, per county tax rolls. The 2026 roll splits $20,609,000 into $18,049,500 land and $2,559,500 improvements.

Zoning: DMC-170 (per King County)

Lot: 24,066 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 127,569 SF; Line Retail 32,067 SF (county building sections)

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

Permit history

2019-01-31: Remodel, declared value $200,000 (Screened), permit 6710400-CN

2014-05-27: Remodel, declared value $93,522 (Screened), permit 6416640

1998-09-03: Remodel, declared value $347,476 (Complete), permit 701478

1997-12-18: Remodel, declared value $35,000 (Complete), permit 696169

1997-12-12: Remodel, declared value $48,800 (Complete), permit 696086

1997-09-26: Remodel, declared value $975 (Complete), permit 694740

Source: King County permit records (newest first).