600 E Mercer St, Seattle, WA 98102

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: high-rise residential, 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 AI estimate from public imagery; may be outdated.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 5,391 reachable multifamily buildings in Seattle. Larger than 49% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 9,120 SF, King County Assessor
Lot size: 5,520 SF, King County Assessor
Year built: 1957, King County Assessor
Stories: 2, King County Assessor
Predominant use: Multi Res, King County Assessor
Units: 11, King County Assessor
Assessed value: $2,750,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $301.54/SF, derived from assessor records
Lot coverage: 165%, derived from assessor records
Vintage: 1950s vintage
Zoning: LR3 (M), King County
County use code: Apartment
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.

532 Belmont Ave E, Seattle · 0 mi · 15,810 SF · built 1925 · assessed $263/SF
605 Boylston Ave E, Seattle · 0 mi · 41,396 SF · built 1965 · assessed $321.29/SF
526 Belmont Ave E, Seattle · 0 mi · 9,588 SF · built 1925 · assessed $292.24/SF
615 E Mercer St, Seattle · 0 mi · 8,346 SF · built 1957 · assessed $341.84/SF
524 Boylston Ave E, Seattle · 0 mi · 34,580 SF · built 1925 · assessed $228.34/SF
627 E Roy St, Seattle · 0 mi · 7,769 SF · built 1959 · assessed $372.51/SF

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Sale history and market context

MakeMe Estimate: $2,706,726 (estimated market value), with a likely range of $2,402,726 to $3,087,621 (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 $246K per unit at the midpoint (11 units).

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

2005-06-27: transfer from Private party to Sand Rock Holdings LLC (non-market transfer), rec. 20050711001334

2003-05-27: $312,000 from Private party to Private party (non-market transfer), rec. 20030530000751

2003-02-12: transfer from Private party to Private party (non-market transfer), rec. 20030218003326

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 $1,219,000 (2011) to $2,750,000 (2026), up 126% over 15 years, per county tax rolls. The 2026 roll splits $2,750,000 into $1,656,000 land and $1,094,000 improvements.

Zoning: LR3 (M) (per King County)

Lot: 5,520 sq ft

Rated views: Seattle skyline

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Multiple Residence (Low Rise) 9,120 SF (county building sections)

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