154 Valley St, Seattle, WA 98109

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: low-rise apartment, 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 AI estimate from public imagery; may be outdated.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 64% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 14,662 SF, King County Assessor
Lot size: 10,560 SF, King County Assessor
Year built: 1959, King County Assessor
Stories: 3, King County Assessor
Predominant use: 18 Unit Apartment, King County Assessor
Units: 18, King County Assessor
Assessed value: $4,544,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $309.92/SF, derived from assessor records
Lot coverage: 139%, derived from assessor records
Vintage: 1950s vintage
Zoning: LR3 (M), King County
County use code: Apartment
Construction (observed): wood frame, AI estimate from public imagery
Parking (observed): structured, 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.

711 2nd Ave N, Seattle · 0 mi · 9,496 SF · built 1964 · assessed $301.28/SF
719 Warren Ave N, Seattle · 0 mi · 6,100 SF · built 1932 · assessed $328.03/SF
805 Warren Ave N, Seattle · 0.1 mi · 19,865 SF · built 1929 · assessed $284.87/SF
800 2nd Ave N, Seattle · 0.1 mi · 27,246 SF · built 1957 · assessed $268.08/SF
800 1st Ave N, Seattle · 0.1 mi · 43,346 SF · built 1959 · assessed $289.60/SF
715 2nd Ave N, Seattle · 0.1 mi · 10,539 SF · built 1909 · assessed $378.50/SF

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Sale history and market context

MakeMe Estimate: $4,311,242 (estimated market value), with a likely range of $3,827,035 to $4,917,929 (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 $240K per unit at the midpoint (18 units).

Last sold: 1998-02-26 for $1,400,000 (recorded arm's-length sale).

Current ownership dates to 2010 (about 16 years) per recorded transfers.

2010-09-16: transfer from Private party to Monger Properties LLC (non-market transfer), rec. 20100920001719

1998-02-26: $1,400,000 from Boileau Properties No 23 to Private party, rec. 199803031901

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 $1,982,000 (2011) to $4,544,000 (2026), up 129% over 15 years, per county tax rolls. The 2026 roll splits $4,544,000 into $3,432,000 land and $1,112,000 improvements.

Zoning: LR3 (M) (per King County)

Lot: 10,560 sq ft

Rated views: Cascades, Territorial, Puget Sound

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Multiple Residence (Low Rise) 14,662 SF (county building sections)

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