1550 4th Ave S, Seattle, WA 98134

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: low-rise office, 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 AI estimate from public imagery; may be outdated.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 65% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 47,368 SF, King County Assessor
Lot size: 53,310 SF, King County Assessor
Year built: 1979, King County Assessor
Stories: 2, King County Assessor
Predominant use: Office Building/ Whse, King County Assessor
Assessed value: $13,646,700, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $288.10/SF, derived from assessor records
Lot coverage: 89%, derived from assessor records
Vintage: 1970s vintage
Zoning: MML U/85, King County
County use code: Office Building
Construction (observed): masonry, AI estimate from public imagery
Parking (observed): surface lot, 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.

1736 4th Ave S, Seattle · 0.1 mi · 13,505 SF · built 1950 · assessed $226.90/SF
1741 4th Ave S, Seattle · 0.1 mi · 5,250 SF · built 1940 · assessed $266.82/SF
1757 4th Ave S, Seattle · 0.2 mi · 4,288 SF · built 1975
1518 1st Ave S, Seattle · 0.2 mi · 63,000 SF · built 1907 · assessed $222.99/SF
1501 1st Ave S, Seattle · 0.3 mi · 539,644 SF · built 2013 · assessed $215.92/SF
1400 Airport Way S, Seattle · 0.3 mi · 5,760 SF · built 1947 · assessed $96.41/SF

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Sale history and market context

MakeMe Estimate: $13,673,995 (estimated market value), with a likely range of $13,315,788 to $18,067,116 (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: 2016-05-18 for $18,000,000 (recorded arm's-length sale).

Current ownership dates to 2016 (about 10 years) per recorded transfers.

2016-05-18: $18,000,000 from Seattle 1550 LLC+Raskin Family Holdings LLC to Spire 1550 4th Ave LP, rec. 20160518000145

2016-05-17: transfer from Seattle 1550 LLC to Raskin Family Holdings LLC (non-market transfer), rec. 20160517001567

2004-08-24: $2,490,446 from Private party to Seattle 1550 LLC, rec. 20040901001765

1991-11-22: $572,500 from Private party to Private party (non-market transfer), rec. 199111272165

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 $7,105,200 (2011) to $13,646,700 (2026), up 92% over 15 years, per county tax rolls. The 2026 roll splits $13,646,700 into $5,597,500 land and $8,049,200 improvements.

Zoning: MML U/85 (per King County)

Lot: 53,310 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Floor and use mix: Office Building 41,968 SF; Warehouse, Distribution 5,400 SF (county building sections)

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

Permit history

2025-12-04: Electrical, declared value $1,000 (Screened), permit 7119650-EL

2025-11-05: Electrical, declared value $2,160 (Screened), permit 7115359-EL

2025-05-28: Electrical, declared value $2,390 (Screened), permit 7088135-EL

2004-11-24: Remodel, declared value $200,000 (Complete), permit 746931

2004-08-10: Building, New, declared value $995,000 (Complete), permit 6114283

2004-08-10: Other, declared value $995,000 (Complete), permit 744490

2004-08-10: Remodel, declared value $550,000 (Complete), permit 744489

2004-06-28: Remodel, declared value $1,500,000 (Complete), permit 743510

Source: King County permit records (newest first).