300 5th Ave, Seattle, WA 98104

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: office building, 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 AI estimate from public imagery; may be outdated.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 93% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

Own this building?

Claim privately

Claiming is for you. Your mailing address is never shown; no offer reaches you unless you opt in.

Claimed owners can confirm facts, watch the estimate, and decide whether to reply.

Claim or manage this building

Building size: 413,264 SF, King County Assessor
Lot size: 26,738 SF, King County Assessor
Year built: 2009, King County Assessor
Stories: 17, King County Assessor
Predominant use: Office Bldg., King County Assessor
Assessed value: $59,307,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $143.51/SF, derived from assessor records
Lot coverage: 1546%, derived from assessor records
Vintage: 2000s vintage
Zoning: DMC 340/290-440, King County
County use code: Office Building
Construction (observed): masonry, 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.

400 Yesler Way, Seattle · 0 mi · 114,395 SF · built 1909
401 5th Ave, Seattle · 0.1 mi · 372,242 SF · built 2006
633 Yesler Way, Seattle · 0.1 mi · 31,432 SF · built 1909 · assessed $298.19/SF
110 Prefontaine Pl S, Seattle · 0.1 mi · 73,470 SF · built 1909 · assessed $143.37/SF
206 3rd Ave S, Seattle · 0.2 mi · 18,300 SF · built 1904
315 5th Ave S, Seattle · 0.2 mi · 181,694 SF · built 2002 · assessed $145.48/SF

Want to talk to the owner? makeme1031 delivers a private, principal-to-principal letter to the owner of record. We never publish the owner's identity or address.

Sale history and market context

MakeMe Estimate: $52,330,973 (estimated market value), with a likely range of $47,294,228 to $68,184,781 (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.

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

3 administrative transfers (no consideration), 2020 to 2020

1999-08-12: $1,490,000 from Private party to Yesler Investment CO LLC (non-market transfer), rec. 19990812001482

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 $66,869,000 (2011) to $59,307,000 (2026), down 11% over 15 years, per county tax rolls. The 2026 roll splits $59,307,000 into $40,107,000 land and $19,200,000 improvements.

Zoning: DMC 340/290-440 (per King County)

Lot: 26,738 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 271,643 SF; Basement, Parking 138,098 SF; Retail Store 3,523 SF (county building sections)

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

Permit history

2024-01-10: Remodel, declared value $2,843,178 (Revisit), permit 6989816-CN

2022-09-20: Remodel (Screened), permit 6908103-BK

2020-10-29: Remodel, declared value $21,462 (Complete), permit 6807660-CN

2020-10-01: Remodel, declared value $50,000 (Complete), permit 6801940-CN

2016-10-25: Remodel, declared value $65,000 (Screened), permit 6563634

2015-04-01: Remodel, declared value $172,500 (Screened), permit 6466840

2011-10-05: Remodel, declared value $286,720 (Complete), permit 6292723

2011-09-01: Remodel, declared value $1,912,362 (Complete), permit 6291301

2011-06-27: Remodel, declared value $2,615,319 (Complete), permit 6268854

2011-02-04: Remodel, declared value $3,715,779 (Complete), permit 6268856

Source: King County permit records (newest first).