221 18th Ave S, Seattle, WA 98144

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 well maintained. AI estimate from public imagery; may be outdated.

One of 5,391 reachable multifamily buildings in Seattle. Larger than 94% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 97,978 SF, King County Assessor
Lot size: 40,320 SF, King County Assessor
Year built: 1972, King County Assessor
Stories: 10, King County Assessor
Predominant use: 155 Unit Apartment Building, King County Assessor
Units: 155, King County Assessor
Assessed value: $28,349,700, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $289.35/SF, derived from assessor records
Lot coverage: 243%, derived from assessor records
Vintage: 1970s vintage
Zoning: LR3 (M), King County
County use code: Apartment(Subsidized)
Construction (observed): masonry, 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.

310 17th Ave S, Seattle · 0.1 mi · 9,206 SF · built 2011 · assessed $438.24/SF
1700 S Jackson St, Seattle · 0.1 mi · 87,041 SF · built 2008 · assessed $165.49/SF
110 18th Ave S, Seattle · 0.1 mi · 146,392 SF · built 2025 · assessed $83.01/SF
1800 S Jackson St, Seattle · 0.1 mi · 371,442 SF · built 2008 · assessed $215.39/SF
400 18th Ave S, Seattle · 0.1 mi · 187,832 SF · built 2017 · assessed $314.37/SF
117 18th Ave, Seattle · 0.1 mi · 21,384 SF · built 1907 · assessed $305.24/SF

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Sale history and market context

MakeMe Estimate: $28,633,745 (estimated market value), with a likely range of $26,154,189 to $29,550,260 (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 $185K per unit at the midpoint (155 units).

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 $9,592,000 (2011) to $28,349,700 (2026), up 196% over 15 years, per county tax rolls. The 2026 roll splits $28,349,700 into $6,048,000 land and $22,301,700 improvements.

Zoning: LR3 (M) (per King County)

Lot: 40,320 sq ft

Rated views: Olympic Mountains, Territorial

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Apartment 97,978 SF (county building sections)

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

Permit history

2026-04-10: Electrical (Screened), permit 7137728-EL

2024-12-06: Remodel, declared value $38,000 (Screened), permit 6976368-CN

2023-12-29: Electrical, declared value $1,000 (Screened), permit 7002697-EL

2023-05-15: Electrical, declared value $847 (Screened), permit 6964611-EL

2020-11-12: Remodel, declared value $40,000 (Screened), permit 6787949-CN

2014-08-07: Remodel, declared value $1,100,000 (Complete), permit 6342035

Source: King County permit records (newest first).