310 Boylston Ave E, Seattle, WA 98102

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: mid-rise apartments, 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 AI estimate from public imagery; may be outdated.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 5,391 reachable multifamily buildings in Seattle. Larger than 8% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 3,402 SF, King County Assessor
Lot size: 7,146 SF, King County Assessor
Year built: 1951, King County Assessor
Stories: 1, King County Assessor
Predominant use: Fourplex, King County Assessor
Units: 4, King County Assessor
Assessed value: $2,911,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $855.67/SF, derived from assessor records
Lot coverage: 48%, derived from assessor records
Vintage: 1950s vintage
Zoning: MR (M), King County
County use code: 4-Plex
Construction (observed): masonry, 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.

303 Harvard Ave E, Seattle · 0 mi · 11,944 SF · built 1949 · assessed $302.58/SF
317 Harvard Ave E, Seattle · 0 mi · 33,736 SF · built 1906 · assessed $248.55/SF
704 E Thomas St, Seattle · 0 mi · 24,939 SF · built 1924 · assessed $266.93/SF
318 Boylston Ave E, Seattle · 0 mi · 5,442 SF · built 1958 · assessed $373.02/SF
801 E Thomas St, Seattle · 0 mi · 34,765 SF · built 2015 · assessed $438.86/SF
607 E Harrison St, Seattle · 0 mi · 36,885 SF · built 1990 · assessed $251.40/SF

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Sale history and market context

MakeMe Estimate: $2,767,403 (estimated market value), with a likely range of $2,456,588 to $3,156,837 (half of recent verified sales in this segment landed inside that range). Based on 667 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works. About $692K per unit at the midpoint (4 units).

Last sold: 2005-03-09 for $725,000 (recorded arm's-length sale).

Current ownership dates to 2005 (about 21 years) per recorded transfers.

2005-03-09: $725,000 from Private party to Private party, rec. 20050321000909

1993-02-25: transfer from Private party to Private party (non-market transfer), rec. 199303122276

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 $894,200 (2011) to $2,911,000 (2026), up 226% over 15 years, per county tax rolls. The 2026 roll splits $2,911,000 into $2,858,000 land and $53,000 improvements.

Zoning: MR (M) (per King County)

Lot: 7,146 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Multiple Residence (Low Rise) 3,402 SF (county building sections)

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