300 8th Ave N, Seattle, WA 98109

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: modern 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 AI estimate from public imagery; may be outdated.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 92% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 365,449 SF, King County Assessor
Lot size: 42,480 SF, King County Assessor
Year built: 2019, King County Assessor
Stories: 6, King County Assessor
Predominant use: 6-Story Class A, King County Assessor
Assessed value: $77,879,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $213.10/SF, derived from assessor records
Lot coverage: 860%, derived from assessor records
Vintage: 2010s vintage
Zoning: SM-SLU 85-280, King County
County use code: Office Building
Construction (observed): metal, AI estimate from public imagery
Parking (observed): none visible, AI estimate from public imagery

Nearby comparable buildings

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

325 9th Ave N, Seattle · 0 mi · 480,702 SF · built 2014 · assessed $229.12/SF
333 8th Ave N, Seattle · 0 mi · 364,133 SF · built 2019 · assessed $111.53/SF
400 Dexter Ave N, Seattle · 0.1 mi · 443,118 SF · built 2017 · assessed $491.67/SF
903 Thomas St, Seattle · 0.1 mi · 254,218 SF · built 2018 · assessed $202.92/SF
307 Westlake Ave N, Seattle · 0.1 mi · 162,200 SF · built 2003 · assessed $451.08/SF
400 9th Ave N, Seattle · 0.1 mi · 483,397 SF · built 2014 · assessed $227.53/SF

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Sale history and market context

MakeMe Estimate: $70,176,482 (estimated market value), with a likely range of $63,422,145 to $91,436,635 (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: 2019-11-05 for $210,785,000 (recorded arm's-length sale).

Current ownership dates to 2019 (about 7 years) per recorded transfers.

2019-11-05: $210,785,000 from City Investors XXV LLC to Ponte Gadea Seattle LLC, rec. 20191106000896

2 administrative transfers (no consideration), 2014 to 2016

2000-08-01: $8,458,000 from King County Rural Library Distsrict to City Investors VII LLC (part of a 5-parcel sale; price is the whole deal), rec. 20000801001518

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 $8,857,000 (2011) to $77,879,000 (2026), up 779% over 15 years, per county tax rolls. The 2026 roll splits $77,879,000 into $36,320,400 land and $41,558,600 improvements.

Zoning: SM-SLU 85-280 (per King County)

Lot: 42,480 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 198,550 SF; Underground Parking Structure 164,155 SF; Retail Store 2,744 SF (county building sections)

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

Permit history

2019-12-04: Remodel, declared value $225,000 (Complete), permit 6738148-CN

2018-07-24: Remodel, declared value $8,922,000 (Complete), permit 6598745-CN

2018-03-23: Remodel, declared value $13,526,887 (Complete), permit 6648860

2017-01-04: Building, New, declared value $56,104,855 (Complete), permit 6355538

2016-10-05: Building, New, declared value $3,080,000 (Complete), permit 6419756

2015-01-12: Demolition (Complete), permit 6419757

2011-09-20: Remodel, declared value $75,000 (Complete), permit 6288725

2011-02-04: Remodel, declared value $600,000 (Complete), permit 6262406

Source: King County permit records (newest first).