5030 1st Ave S, Seattle, WA 98134

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 AI estimate from public imagery; may be outdated.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 64% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 43,473 SF, King County Assessor
Lot size: 46,734 SF, King County Assessor
Year built: 2000, King County Assessor
Stories: 3, King County Assessor
Predominant use: Office Building, King County Assessor
Assessed value: $13,625,800, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $313.43/SF, derived from assessor records
Lot coverage: 93%, derived from assessor records
Vintage: 2000s vintage
Zoning: MML U/85, King County
County use code: Office Building
Construction (observed): steel glass, AI estimate from public imagery
Parking (observed): surface lot, 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.

5005 3rd Ave S, Seattle · 0.1 mi · 93,610 SF · built 1950 · assessed $296.03/SF
5216 1st Ave S, Seattle · 0.1 mi · 6,952 SF · built 2000 · assessed $314.50/SF
5303 1st Ave S, Seattle · 0.1 mi · 17,856 SF · built 2006 · assessed $301.56/SF
128 S Lucile St, Seattle · 0.2 mi · 9,800 SF · built 1989 · assessed $205.51/SF
74 S Lucile St, Seattle · 0.2 mi · 4,413 SF · built 1931 · assessed $210.79/SF
5307 4th Ave S, Seattle · 0.3 mi · 915 SF · built 1987 · assessed $266.99/SF

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Sale history and market context

MakeMe Estimate: $13,647,322 (estimated market value), with a likely range of $13,289,814 to $18,031,873 (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.

Last sold: 2021-04-20 for $12,300,000 (recorded arm's-length sale).

Current ownership dates to 2021 (about 5 years) per recorded transfers.

2021-04-20: $12,300,000 from Private party to Seattle Labor Temple Association INC, rec. 20210420001771

2006-02-06: $6,300,000 from 5030 First LLC the to Private party, rec. 20060210001998

2000-06-01: transfer from Private party to 5030 First LLC (non-market transfer), rec. 20000605000643

1993-03-17: $300,000 from Private party to Private party, rec. 199303310182

1993-03-02: $7,440 from Union Pacific Railroad CO to Private party (non-market transfer), rec. 199303310181

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 $6,236,800 (2011) to $13,625,800 (2026), up 118% over 15 years, per county tax rolls. The 2026 roll splits $13,625,800 into $2,804,000 land and $10,821,800 improvements.

Zoning: MML U/85 (per King County)

Lot: 46,734 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Floor and use mix: Office Building 21,250 SF; Laboratories 20,645 SF (county building sections)

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

Permit history

2026-02-20: Electrical (Screened), permit 7130239-EL

2025-10-30: Remodel, declared value $35,000, permit 7108253-CN

2025-08-25: Remodel, declared value $185,133, permit 7074172-CN

2025-04-04: Other, declared value $1,500 (Screened), permit 7078644-RF

2025-04-02: Electrical, declared value $1,000 (Screened), permit 7078640-EL

2025-03-20: Electrical, declared value $1,000 (Screened), permit 7076544-EL

2022-04-08: Remodel, declared value $14,178 (Screened), permit 6883919-CN

2021-07-06: Remodel, declared value $550,000 (Complete), permit 6824815-CN

2015-06-02: Remodel, declared value $250,000 (Complete), permit 6441884

2010-12-01: Remodel, declared value $300,000 (Complete), permit 6246616

Source: King County permit records (newest first).