300 W Republican St, Seattle, WA 98119

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: mid-rise mixed-use (under construction), appears multi-tenant. AI estimate from public imagery. In recent public imagery (2026-06), the building appears serviceable with visible wear. AI estimate from public imagery; may be outdated.

One of 957 reachable office buildings in Seattle. Larger than 73% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 80,035 SF, King County Assessor
Lot size: 7,200 SF, King County Assessor
Year built: 2024, King County Assessor
Stories: 7, King County Assessor
Predominant use: Workforce Housing, King County Assessor
Units: 169, King County Assessor
Assessed value: $23,745,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $296.68/SF, derived from assessor records
Lot coverage: 1112%, derived from assessor records
Vintage: 2020s vintage
Zoning: SM-UP 85 (M1), 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.

309 W Republican St, Seattle · 0 mi · 3,822 SF · built 1900 · assessed $385.03/SF
450 3rd Ave W, Seattle · 0.1 mi · 240,700 SF · built 2016 · assessed $172.64/SF
111 W Harrison St, Seattle · 0.1 mi · 4,301 SF · built 1951 · assessed $349.31/SF
410 W Harrison St, Seattle · 0.1 mi · 50,028 SF · built 1962 · assessed $395.90/SF
400 2nd Ave W, Seattle · 0.1 mi · 241,875 SF · built 2000 · assessed $123.18/SF
115 W Mercer St, Seattle · 0.1 mi · 33,290 SF · built 2019 · assessed $237.46/SF

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Sale history and market context

MakeMe Estimate: $23,026,783 (estimated market value), with a likely range of $20,810,505 to $30,002,809 (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: 2020-11-02 for $3,300,000 (recorded arm's-length sale).

Current ownership dates to 2020 (about 6 years) per recorded transfers.

2021-06-18: transfer from Koz Development LLC to Koz on 3rd Avenue West LLC (part of a 2-parcel sale; price is the whole deal), rec. 20210624002208

2020-11-02: $3,300,000 from 505 Third West LLC to Koz Development LLC, rec. 20201102001860

2001-12-13: $950,000 from Private party to 505 Third West LLC, rec. 20011217002393

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 $901,000 (2011) to $23,745,000 (2026), up 2535% over 15 years, per county tax rolls. The 2026 roll splits $23,745,000 into $3,960,000 land and $19,785,000 improvements.

Zoning: SM-UP 85 (M1) (per King County)

Lot: 7,200 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Apartment 80,035 SF (county building sections)

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

Permit history

2024-12-13: Electrical, declared value $30,727 (Screened), permit 7060991-EL

2024-12-12: Electrical, declared value $35,000 (Screened), permit 7060675-EL

2024-06-20: Other, declared value $10,032 (Screened), permit 7031434-RF

2024-06-19: Electrical, declared value $1,875 (Screened), permit 7031449-EL

2024-06-03: Electrical, declared value $5,000 (Screened), permit 7028220-EL

2023-09-27: Building, New, declared value $13,790,971 (Revisit), permit 6802005-CN

2023-07-18: Demolition, declared value $10,000,000 (Complete), permit 6802006-DM

Source: King County permit records (newest first).