1100 NE 45th St, Seattle, WA 98105

Office · 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 AI estimate from public imagery; may be outdated.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 957 reachable office buildings in Seattle. Larger than 75% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 91,706 SF, King County Assessor
Lot size: 11,155 SF, King County Assessor
Year built: 2001, King County Assessor
Stories: 6, King County Assessor
Predominant use: Office Building W/ Basement Parking Gar., King County Assessor
Assessed value: $19,919,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $217.20/SF, derived from assessor records
Lot coverage: 822%, derived from assessor records
Vintage: 2000s vintage
Zoning: SM-U 95-320 (M1), King County
County use code: Office Building
Construction (observed): masonry, 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.

1107 NE 45th St, Seattle · 0 mi · 99,005 SF · built 1961 · assessed $209.44/SF
1121 NE 45th St, Seattle · 0 mi · 97,812 SF · built 2018 · assessed $233.22/SF
4333 Brooklyn Ave NE, Seattle · 0.1 mi · 336,254 SF · built 1971
4317 12th Ave NE, Seattle · 0.1 mi · 258,304 SF · built 1969
4311 11th Ave NE, Seattle · 0.1 mi · 135,051 SF · built 2002 · assessed $218.97/SF
4530 12th Ave NE, Seattle · 0.1 mi · 328,919 SF · built 2024 · assessed $195.53/SF

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Sale history and market context

MakeMe Estimate: $19,158,778 (estimated market value), with a likely range of $17,314,786 to $24,962,981 (half of recent verified sales in this segment landed inside that range). Based on 12 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2000-03-06 for $1,275,000 (recorded arm's-length sale).

Current ownership dates to 2000 (about 26 years) per recorded transfers.

2 administrative transfers (no consideration), 2000 to 2000

2000-03-06: $1,275,000 from Api Pichon VIII LLC to Blume 45th Plaza LLC, rec. 20000307001287

1999-10-19: transfer from Api Pichon VIII LLC to Seattle City of (non-market transfer), rec. 19991022001171

1997-06-02: $7,430,000 from Caslon Management Group to Api/Pichon VIII LLC (part of a 4-parcel sale; price is the whole deal), rec. 199706021094

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 $10,424,100 (2011) to $19,919,000 (2026), up 91% over 15 years, per county tax rolls. The 2026 roll splits $19,919,000 into $6,971,800 land and $12,947,200 improvements.

Zoning: SM-U 95-320 (M1) (per King County)

Lot: 11,155 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 46,636 SF; Basement, Parking 34,701 SF; Retail Store 8,487 SF; Parking Structure 1,882 SF (county building sections)

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

Permit history

2025-04-23: Remodel, declared value $775,743 (Revisit), permit 7068829-CN

2023-08-01: Remodel, declared value $276,374 (Screened), permit 6971442-CN

2019-09-03: Remodel, declared value $650,000 (Screened), permit 6725707-CN

2016-05-06: Remodel, declared value $250,000 (Complete), permit 6515224

2011-10-26: Remodel, declared value $120,000 (Complete), permit 6295918

2004-04-02: Remodel (Complete), permit 741568

2002-07-31: Remodel, declared value $34,400 (Complete), permit 729481

2000-04-06: Building, New, declared value $7,266,667 (Complete), permit 712761

1998-09-28: Other, declared value $7,262,233 (Screened), permit 702043

Source: King County permit records (newest first).