1124 Columbia St, Seattle, WA 98104

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: medical facility, 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 AI estimate from public imagery; may be outdated.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 957 reachable office buildings in Seattle. Larger than 92% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 383,914 SF, King County Assessor
Lot size: 61,440 SF, King County Assessor
Year built: 1975, King County Assessor
Stories: 7, King County Assessor
Predominant use: Hospital/Medical Office Building, King County Assessor
Assessed value: $91,214,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $237.59/SF, derived from assessor records
Lot coverage: 625%, derived from assessor records
Vintage: 1970s vintage
Zoning: MIO-160-NC3-200 (M), King County
County use code: Medical/Dental Office
Construction (observed): masonry, AI estimate from public imagery

Nearby comparable buildings

Same building type, by distance. Assessor facts only; not an opinion of value.

1101 Madison St, Seattle · 0.1 mi · 690,158 SF · built 1992 · assessed $145.09/SF
901 Boren Ave, Seattle · 0.1 mi · 319,911 SF · built 1973 · assessed $130.64/SF
803 Terry Ave, Seattle · 0.1 mi · 27,800 SF · built 1912 · assessed $305.60/SF
801 Broadway, Seattle · 0.1 mi · 250,902 SF · built 1970 · assessed $192.85/SF
921 Terry Ave, Seattle · 0.1 mi · 121,099 SF · built 1983 · assessed $306.99/SF
1395 Marion St, Seattle · 0.1 mi · 12,000 SF · built 2016 · assessed $299.06/SF

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Sale history and market context

MakeMe Estimate: $89,296,192 (estimated market value), with a likely range of $80,701,624 to $116,348,712 (half of recent verified sales in this segment landed inside that range). Based on 55 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2016-01-14 for $185,682,833 (recorded arm's-length sale).

Current ownership dates to 2016 (about 10 years) per recorded transfers.

2016-01-14: $185,682,833 from TC Columbia Associates LLC to Hart First Hill LLC, rec. 20160114001055

2013-01-22: $42,600,000 from Alexandria Real Estate Equities INC to TC Columbia Associates LLC (part of a 6-parcel sale; price is the whole deal), rec. 20130122003126

1996-05-31: $29,480,000 from Fred Hutchinson Cancer Research Center to Health Science Properties INC (part of a 6-parcel sale; price is the whole deal), rec. 199605310465

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 $25,198,400 (2011) to $91,214,000 (2026), up 262% over 15 years, per county tax rolls. The 2026 roll splits $91,214,000 into $33,669,500 land and $57,544,500 improvements.

Zoning: MIO-160-NC3-200 (M) (per King County)

Lot: 61,440 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Basement, Parking 141,385 SF; Hospital 120,000 SF; Medical Office 107,569 SF; Basement, Unfinished 14,960 SF (county building sections)

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

Permit history

2025-03-10: Remodel (Screened), permit 7071166-BK

2024-04-03: Remodel (Screened), permit 7012283-BK

2023-12-13: Remodel, declared value $218,700 (Screened), permit 6995721-CN

2023-01-20: Remodel (Screened), permit 6939182-BK

2017-06-28: Remodel, declared value $90,000 (Complete), permit 6572005

2016-08-03: Remodel, declared value $354,600 (Screened), permit 6548340

2016-07-22: Remodel, declared value $1,500,000 (Screened), permit 6545111

2016-04-05: Remodel, declared value $375,000 (Screened), permit 6526691

2016-03-17: Remodel, declared value $1,400,000 (Screened), permit 6513772

2015-04-07: Remodel, declared value $748,000 (Complete), permit 6463093

Source: King County permit records (newest first).