22870 SE Fir St, Black Diamond, WA 98010

Multifamily · Black Diamond · Seattle-Bellevue metro, WA

Imagery suggests: apartment complex, 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 AI estimate from public imagery; may be outdated.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 3 reachable multifamily buildings in Black Diamond.

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Building size
175,414 SF, King County Assessor
Lot size
267,788 SF, King County Assessor
Year built
2021, King County Assessor
Stories
3, King County Assessor
Buildings on parcel
5, King County Assessor
Predominant use
Building 1,4,5,7,8,10,14 (style A), King County Assessor
Units
176, King County Assessor
Assessed value
$52,299,200, per the King County Assessor (not a market appraisal)
Assessed value per building SF
$298.15/SF, derived from assessor records
Lot coverage
66%, derived from assessor records
Vintage
2020s vintage
Zoning
MPD, King County
County use code
Apartment
Construction (observed)
wood frame, AI estimate from public imagery
Parking (observed)
street only, 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.

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Sale history and market context

MakeMe Estimate: $56,577,979 (estimated market value), with a likely range of $51,678,576 to $58,388,939 (half of recent verified sales in this segment landed inside that range). Based on 98 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works. About $321K per unit at the midpoint (176 units).

Current ownership dates to 2021 (about 5 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

$16.9M$33.8M$50.7M$67.6M2020202220242026County appraised valueEstimated value (modeled range)

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 $326,000 (2020) to $52,299,200 (2026), up 15943% over 6 years, per county tax rolls. The 2026 roll splits $52,299,200 into $5,355,700 land and $46,943,500 improvements.

Taxes

Permit history

Source: King County permit records (newest first).