800 Seneca St, Seattle, WA 98101

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: mid-rise mixed-use, 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 AI estimate from public imagery; may be outdated.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 99% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 434,839 SF, King County Assessor
Lot size: 7,200 SF, King County Assessor
Year built: 2014, King County Assessor
Stories: 32, King County Assessor
Predominant use: Cielo Apts W/ Line Retail, King County Assessor
Units: 335, King County Assessor
Assessed value: $124,790,600, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $286.98/SF, derived from assessor records
Lot coverage: 6039%, derived from assessor records
Vintage: 2010s vintage
Zoning: HR (M), King County
County use code: Apartment(Mixed Use)
Construction (observed): steel glass, 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.

1110 8th Ave, Seattle · 0 mi · 24,000 SF · built 1928 · assessed $272.29/SF
720 Seneca St, Seattle · 0 mi · 164,120 SF · built 1927 · assessed $224.82/SF
1102 8th Ave, Seattle · 0.1 mi · 81,776 SF · built 1928 · assessed $309.75/SF
1101 8th Ave, Seattle · 0.1 mi · 766,545 SF · built 2021 · assessed $351.28/SF
1000 8th Ave, Seattle · 0.1 mi · 333,244 SF · built 1949 · assessed $170.46/SF
903 Union St, Seattle · 0.1 mi · 90,920 SF · built 1922 · assessed $235.68/SF

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Sale history and market context

MakeMe Estimate: $111,493,878 (estimated market value), with a likely range of $101,839,000 to $115,062,598 (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 $333K per unit at the midpoint (335 units).

Last sold: 2005-11-21 for $3,895,000 (recorded arm's-length sale).

Current ownership dates to 2012 (about 14 years) per recorded transfers.

2020-02-27: transfer from First Hill Eighth Avenue LLC to First Hill Eighth Avenue Propco LLC (part of a 3-parcel sale; price is the whole deal), rec. 20200227001629

2012-06-01: $12,000,000 from Wa Seneca Holdings LLC to First Hill/Eighth Avenue LLC (part of a 3-parcel sale; price is the whole deal), rec. 20120601001009

2 administrative transfers (no consideration), 2007 to 2010

2005-11-21: $3,895,000 from Park Seneca LLC to Alfaretta LLC, rec. 20051121000844

2002-02-12: $2,794,000 from Private party to Park Seneca LLC, rec. 20020212001948

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 $1,189,000 (2011) to $124,790,600 (2026), up 10395% over 15 years, per county tax rolls. The 2026 roll splits $124,790,600 into $4,140,000 land and $120,650,600 improvements.

Zoning: HR (M) (per King County)

Lot: 7,200 sq ft

Rated views: Mt. Rainier, Olympic Mountains, Cascades, Territorial, Seattle skyline

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Apartment 295,856 SF; Basement, Parking 116,600 SF; Retail Store 3,463 SF (county building sections)

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

Permit history

2025-11-21: Other, declared value $250,000, permit 7116611-RF

2016-09-12: Remodel, declared value $150,000 (Screened), permit 6536313

2016-01-22: Remodel, declared value $100,000 (Screened), permit 6489296

2013-05-30: Building, New, declared value $68,696,961 (Complete), permit 6327387

2013-04-08: Building, New, declared value $15,922,471 (Complete), permit 6159274

2012-08-24: Demolition (Complete), permit 6332337

Source: King County permit records (newest first).