3003 Island Crest Way, Mercer Island, WA 98040

Office · Mercer Island · Seattle-Bellevue metro, WA

One of 34 reachable office buildings in Mercer Island. Larger than 6% of office buildings in Mercer Island (median 11,827 SF), derived from assessor records.

Usable building area
3,683 SF, King County Assessor
Lot size
19,169 SF, King County Assessor
Year built
1957, King County Assessor
Stories
2, King County Assessor
Predominant use
Clinic, King County Assessor
Assessed value
$1,862,400, per the King County Assessor (not a market appraisal)
Assessed value per usable SF
$505.67/SF, derived from assessor records
Usable area / lot
0.19, derived from assessor records
Vintage
1950s vintage
Zoning
MF-2, King County
County use code
Medical/Dental Office

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 range: $1.9M to $2.77M (estimated market value range). This building's own 2022 recorded sale at $3.3M sits 53% above this estimate's midpoint, so we lead with the range rather than a single number. Based on 8 verified arm's-length comparable sales (through 2026-06-01). Not an appraisal. How this estimate works.

lower confidence: 1 comparable sale within 3 miles; nearest 3 mi. This property type carries wider measured error; treat the estimate as a starting point. Last arm's-length sale: $3,300,000 in 2022. The market has moved since; the estimate reflects current county values and ratios, not that price.

Comparable sales used as evidence

Recorded arm's-length sales of similar buildings nearby; nearer and more recent sales rank first. Buyer and seller names are withheld. Get this data via API.

Last sold: 2022-12-20 for $3,300,000 (recorded arm's-length sale).

Current ownership dates to 2022 (about 4 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

$0$1M$2M$3M$4M201120142017202020232026$1MLast sold $3.3M · 2022$2.15M$1.86MCounty assessed valueMakeMe Estimate rangeRecorded sale

Dark line: county assessed value per King County tax rolls. Blue line: our estimate; dashed years are a modeled backcast built from recorded arm's-length sales in the building's segment, not estimates published at the time, and years without enough sales stay unmodeled. The shaded range is the model's measured error band; about half of verified sales in the segment land inside it. Diamonds: recorded arm's-length sales. Not an appraisal. How this estimate works.

Land, site, and value history

Assessed value moved from $1,534,500 (2011) to $1,862,400 (2026), up 21% over 15 years, per county tax rolls. The 2026 roll splits $1,862,400 into $1,610,100 land and $252,300 improvements.

Taxes

Permit history

Source: King County permit records (newest first).