400 18th Ave S, Seattle, WA 98144

Multifamily · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: modern 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 AI estimate from public imagery; may be outdated.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 97% of multifamily buildings in Seattle (median 9,444 SF), derived from assessor records.

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Building size: 187,832 SF, King County Assessor
Lot size: 6,921 SF, King County Assessor
Year built: 2017, King County Assessor
Stories: 5, King County Assessor
Predominant use: Mixed-Use Apartments, King County Assessor
Units: 160, King County Assessor
Assessed value: $59,048,700, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $314.37/SF, derived from assessor records
Lot coverage: 2714%, derived from assessor records
Vintage: 2010s vintage
Zoning: NC3P-55 (M), King County
County use code: Apartment(Mixed Use)
Parking (observed): surface lot, 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.

1800 S Jackson St, Seattle · 0.1 mi · 371,442 SF · built 2008 · assessed $215.39/SF
1700 S Jackson St, Seattle · 0.1 mi · 87,041 SF · built 2008 · assessed $165.49/SF
310 17th Ave S, Seattle · 0.1 mi · 9,206 SF · built 2011 · assessed $438.24/SF
221 18th Ave S, Seattle · 0.1 mi · 97,978 SF · built 1972 · assessed $289.35/SF
1842 S King St, Seattle · 0.1 mi · 7,343 SF · built 1918 · assessed $318.67/SF
1643 S Weller St, Seattle · 0.1 mi · 5,616 SF · built 1927 · assessed $293.45/SF

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Sale history and market context

MakeMe Estimate: $54,532,506 (estimated market value), with a likely range of $49,810,232 to $56,277,994 (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 $341K per unit at the midpoint (160 units).

Current ownership dates to 2021 (about 5 years) per recorded transfers.

2021-01-26: $72,097,000 from South Jackson Street Development LLC to Bell Fund VII Jackson Street LLC (part of a 7-parcel sale; price is the whole deal), rec. 20210128001999

2017-01-05: $9,500,000 from Atlantic LLC to South Jackson Street Development LLC (part of a 7-parcel sale; price is the whole deal), rec. 20170105001805

2012-12-27: $1,225,000 from Deluxe Properties LP to Atlantic LLC (part of a 3-parcel sale; price is the whole deal), rec. 20121228003197

2009-02-18: $600,000 from Abm Janitorial Services Northwest INC to Deluxe Properties Limited Partnership, rec. 20090224001626

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 $57,317,890 (2019) to $59,048,700 (2026), up 3% over 7 years, per county tax rolls. The 2026 roll splits $59,048,700 into $0 land and $59,048,700 improvements.

Zoning: NC3P-55 (M) (per King County)

Lot: 6,921 sq ft

Rated views: Olympic Mountains, Territorial, Seattle skyline

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Multiple Residence (Low Rise) 137,128 SF; Parking Structure 23,075 SF; Basement, Parking 12,225 SF; Mixed Use Retail 8,070 SF (county building sections)

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

Permit history

2025-06-25: Electrical, declared value $2,775 (Screened), permit 7093031-EL

2025-03-14: Remodel, declared value $25,000, permit 7033834-CN

2024-10-28: Electrical, declared value $10,000 (Screened), permit 7053478-EL

2022-05-24: Remodel, declared value $13,274 (Screened), permit 6876556-CN

2020-09-30: Remodel, declared value $210,000 (Complete), permit 6775402-CN

2019-09-05: Remodel, declared value $200,000 (Complete), permit 6687026-CN

2017-01-20: Building, New, declared value $22,788,298 (Complete), permit 6362512

2016-12-07: Demolition (Complete), permit 6541364

Source: King County permit records (newest first).