3021 81st Pl SE, Mercer Island, WA 98040

Multifamily · Mercer Island · Seattle-Bellevue metro, WA

Imagery suggests: garden apartments, 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 AI estimate from public imagery; may be outdated.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 26 reachable multifamily buildings in Mercer Island. Larger than 27% of multifamily buildings in Mercer Island (median 25,665 SF), derived from assessor records.

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Building size
10,148 SF, King County Assessor
Lot size
18,700 SF, King County Assessor
Year built
1958, King County Assessor
Stories
2, King County Assessor
Predominant use
9-Unit Apt Bldg, King County Assessor
Units
9, King County Assessor
Assessed value
$2,785,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF
$274.44/SF, derived from assessor records
Lot coverage
54%, derived from assessor records
Vintage
1950s vintage
Zoning
MF-2, King County
County use code
Apartment
Construction (observed)
wood frame, AI estimate from public imagery
Parking (observed)
surface lot, AI estimate from public imagery

Nearby comparable buildings

Same building type, by distance. Assessor facts only; not an opinion of value.

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Sale history and market context

MakeMe Estimate: $2,722,787 (estimated market value), with a likely range of $2,416,983 to $3,105,943 (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 $303K per unit at the midpoint (9 units).

Last sold: 2011-07-15 for $1,298,650 (recorded arm's-length sale).

Current ownership dates to 2011 (about 15 years) per recorded transfers.

Source: King County recorded sales extract; buyer and seller shown only when a company or organization. Individual names are withheld.

Value over time

$1.2M$2.4M$3.59M$4.79M201120142017202020232026$1.3MCounty appraised valueEstimated value (modeled range)Recorded sale

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 $1,403,500 (2011) to $2,785,000 (2026), up 98% over 15 years, per county tax rolls. The 2026 roll splits $2,785,000 into $1,570,800 land and $1,214,200 improvements.

Taxes

Permit history

Source: King County permit records (newest first).