437 N 34th St, Seattle, WA 98103

Office · Seattle · Seattle-Bellevue metro, WA

One of 957 reachable office buildings in Seattle. Larger than 67% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 53,108 SF, King County Assessor
Lot size: 65,914 SF, King County Assessor
Year built: 1996, King County Assessor
Stories: 3, King County Assessor
Predominant use: Office Building & Lab Space, King County Assessor
Assessed value: $19,023,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $358.19/SF, derived from assessor records
Lot coverage: 81%, derived from assessor records
Vintage: 1990s vintage
Zoning: IC-65 (M), King County
County use code: Office Building

Nearby comparable buildings

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

436 N 34th St, Seattle · 0 mi · 124,071 SF · built 1988 · assessed $200.39/SF
501 N 34th St, Seattle · 0.1 mi · 90,000 SF · built 2000 · assessed $174.41/SF
3417 Evanston Ave N, Seattle · 0.1 mi · 80,934 SF · built 2012 · assessed $173.75/SF
551 N 34th St, Seattle · 0.1 mi · 77,174 SF · built 2000 · assessed $196.30/SF
425 N 36th St, Seattle · 0.1 mi · 1,500 SF · built 1900 · assessed $400/SF
408 N 35th St, Seattle · 0.1 mi · 7,218 SF · built 1972 · assessed $405.04/SF

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Sale history and market context

MakeMe Estimate: $19,476,216 (estimated market value), with a likely range of $17,601,672 to $25,376,588 (half of recent verified sales in this segment landed inside that range). Based on 55 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2014-03-27 for $11,600,000 (recorded arm's-length sale).

Current ownership dates to 2014 (about 12 years) per recorded transfers.

2014-03-27: $11,600,000 from SMB of Seattle LLC to Seventeen Meters LLC, rec. 20140331001561

2010-06-28: $75,000 from Fremont Dock Company to Private party, rec. 20100729000146

1997-06-19: $4,550,000 from Quadrant Corporation to SMB Seattle LLC, rec. 199706230757

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 $6,582,900 (2011) to $19,023,000 (2026), up 189% over 15 years, per county tax rolls. The 2026 roll splits $19,023,000 into $11,535,000 land and $7,488,000 improvements.

Zoning: IC-65 (M) (per King County)

Lot: 65,914 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 42,971 SF; Laboratories 10,137 SF (county building sections)

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

Permit history

2024-12-17: Other, declared value $538,000 (Complete), permit 7061352-RF

2024-10-08: Electrical, declared value $167,804 (Complete), permit 7050069-EL

2024-07-10: Remodel, declared value $2,000,000 (Complete), permit 7006859-CN

2017-04-04: Remodel, declared value $125,000 (Screened), permit 6589920

2014-05-08: Remodel, declared value $4,514,180 (Complete), permit 6400999

2014-05-08: Remodel, declared value $1,062,160 (Complete), permit 6400981

Source: King County permit records (newest first).