1441 N 34th St, Seattle, WA 98103

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: mid-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 AI estimate from public imagery; may be outdated.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 77% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 103,697 SF, King County Assessor
Lot size: 25,976 SF, King County Assessor
Year built: 2001, King County Assessor
Stories: 3, King County Assessor
Predominant use: 1441 Lake Union Center, King County Assessor
Assessed value: $40,570,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $391.24/SF, derived from assessor records
Lot coverage: 399%, derived from assessor records
Vintage: 2000s vintage
Zoning: IC-65 (M), King County
County use code: Medical/Dental Office
Construction (observed): masonry, AI estimate from public imagery
Parking (observed): street only, 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.

1621 N 34th St, Seattle · 0 mi · 336,268 SF · built 2016 · assessed $241.35/SF
1341 N Northlake Way, Seattle · 0.1 mi · 49,782 SF · built 2008 · assessed $333.67/SF
1443 N Northlake Way, Seattle · 0.1 mi · 6,400 SF · built 1955 · assessed $398.52/SF
3400 Stone Way N, Seattle · 0.1 mi · 213,682 SF · built 2013 · assessed $181.88/SF
1300 N Northlake Way, Seattle · 0.2 mi · 15,995 SF · built 1999 · assessed $328.98/SF
1914 N 34th St, Seattle · 0.2 mi · 26,694 SF · built 1981 · assessed $253.23/SF

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Sale history and market context

MakeMe Estimate: $40,980,671 (estimated market value), with a likely range of $37,036,369 to $53,395,875 (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.

Current ownership dates to 2000 (about 26 years) per recorded transfers.

2000-01-28: transfer from George M Neffner III Limited Prtnrshp to Seattle Investment Prtnrs 1998 LLC (non-market transfer), rec. 20000207000453

1998-05-08: $1,420,000 from Private party to Neffer George M III LP (non-market transfer), rec. 199805131842

1994-09-07: transfer from Private party to Private party (part of a 3-parcel sale; price is the whole deal), rec. 199409131518

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 $1,229,800 (2011) to $40,570,000 (2026), up 3199% over 15 years, per county tax rolls. The 2026 roll splits $40,570,000 into $7,403,100 land and $33,166,900 improvements.

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

Lot: 25,976 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 43,117 SF; Basement, Parking 40,159 SF; Laboratories 20,421 SF (county building sections)

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

Permit history

2024-04-07: Remodel, declared value $200,000 (Complete), permit 7017899-CN

2021-04-30: Remodel, declared value $100,000 (Complete), permit 6784803-CN

2018-10-08: Remodel, declared value $3,346,352 (Complete), permit 6651460-CN

2017-07-11: Remodel, declared value $260,300 (Complete), permit 6605270

2013-08-14: Remodel, declared value $1,100,000 (Complete), permit 6364500

2012-11-08: Remodel, declared value $195,219 (Complete), permit 6331694

1999-07-23: Other, declared value $7,354,887 (Complete), permit 707727

Source: King County permit records (newest first).