1813 Westlake Ave N, Seattle, WA 98109

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 AI estimate from public imagery; may be outdated.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 70% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 66,462 SF, King County Assessor
Lot size: 66,646 SF, King County Assessor
Year built: 1952, King County Assessor
Stories: 3, King County Assessor
Predominant use: Television Station, King County Assessor
Assessed value: $26,879,200, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $404.43/SF, derived from assessor records
Lot coverage: 100%, derived from assessor records
Vintage: 1950s vintage
Zoning: C1-75 (M), King County
County use code: Office Building
Construction (observed): steel glass, 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.

1836 Westlake Ave N, Seattle · 0.1 mi · 10,260 SF · built 1962 · assessed $373.19/SF
1725 Westlake Ave N, Seattle · 0.1 mi · 34,698 SF · built 1920 · assessed $295.05/SF
1800 Westlake Ave N, Seattle · 0.1 mi · 10,860 SF · built 1963 · assessed $498.41/SF
1818 Westlake Ave N, Seattle · 0.1 mi · 30,840 SF · built 1965 · assessed $283.48/SF
1751 Dexter Ave N, Seattle · 0.1 mi · 6,928 SF · built 1967 · assessed $656.06/SF
1848 Westlake Ave N, Seattle · 0.1 mi · 23,355 SF · built 1949 · assessed $329.66/SF

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Sale history and market context

MakeMe Estimate: $23,740,682 (estimated market value), with a likely range of $23,118,766 to $31,367,983 (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.

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

2017-06-14: $10 from Private party to Nbinv Ap2 LLC (part of a 2-parcel sale; price is the whole deal), rec.

2016-07-07: $19,500,000 from Wa-1813 Westlake Avenue LLC to Allstate Insurance Company (part of a 2-parcel sale; price is the whole deal), rec. 20160708001176

2012-12-21: transfer from Tribune Broadcasting Seattle LLC to Wa-1813 Westlake Ave LLC (part of a 2-parcel sale; price is the whole deal), rec. 20160610000281

1999-02-26: $11,800,000 from KCPQ Acquisition Corp to WGNX INC C/O Tribune Broadcasting CO (part of a 2-parcel sale; price is the whole deal), rec. 199903012710

1994-11-09: $2,850,000 from Private party to Kelly Television Company (part of a 2-parcel sale; price is the whole deal), rec. 199411090775

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 $12,189,800 (2011) to $26,879,200 (2026), up 121% over 15 years, per county tax rolls. The 2026 roll splits $26,879,200 into $18,327,600 land and $8,551,600 improvements.

Zoning: C1-75 (M) (per King County)

Lot: 66,646 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Broadcast Facilities 26,288 SF; Open Office 18,098 SF; Parking Levels (Intermediate/Under Building) 12,998 SF; Office Building 9,078 SF (county building sections)

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

Permit history

2026-02-24: Electrical, permit 7130702-EL

2024-11-21: Electrical, declared value $684 (Screened), permit 7057571-EL

2023-05-02: Electrical, declared value $7,000 (Screened), permit 6962252-EL

2005-11-22: Other, declared value $20,000 (Complete), permit 6078700

Source: King County permit records (newest first).