3120 139th Ave SE, Bellevue, WA 98005

Office · Bellevue · Seattle-Bellevue metro, WA

Imagery suggests: mid-rise office, 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 AI estimate from public imagery; may be outdated.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 308 reachable office buildings in Bellevue. Larger than 87% of office buildings in Bellevue (median 23,608 SF), derived from assessor records.

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Building size: 216,636 SF, King County Assessor
Lot size: 47,045 SF, King County Assessor
Year built: 1999, King County Assessor
Stories: 5, King County Assessor
Predominant use: Office - Building 5, King County Assessor
Assessed value: $24,887,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $114.88/SF, derived from assessor records
Lot coverage: 460%, derived from assessor records
Vintage: 1990s vintage
Zoning: OLB, King County
County use code: Office Building
Construction (observed): steel glass, AI estimate from public imagery
Parking (observed): none visible, AI estimate from public imagery

Nearby comparable buildings

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

3150 139th Ave SE, Bellevue · 0.1 mi · 221,772 SF · built 1999 · assessed $110.95/SF
3180 139th Ave SE, Bellevue · 0.1 mi · 205,783 SF · built 1999 · assessed $119.44/SF
13810 SE Eastgate Way, Bellevue · 0.2 mi · 561,684 SF · built 1992 · assessed $88.22/SF
14350 SE Eastgate Way, Bellevue · 0.3 mi · 24,234 SF · built 1993
14360 SE Eastgate Way, Bellevue · 0.3 mi · 89,370 SF · built 1981 · assessed $221.10/SF
3245 146th Pl SE, Bellevue · 0.3 mi · 93,878 SF · built 1987 · assessed $121.69/SF

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Sale history and market context

MakeMe Estimate: $27,358,074 (estimated market value), with a likely range of $24,724,918 to $35,646,276 (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.

Current ownership dates to 2019 (about 7 years) per recorded transfers.

2019-09-11: $211,724,805 from Sunset North LLC to Sunset North Owner LLC (part of a 5-parcel sale; price is the whole deal), rec. 20190911001409

2016-03-31: $155,192,500 from Sunset North Corporate Campus Property LLC to Sunset North LLC (part of a 6-parcel sale; price is the whole deal), rec. 20160331002397

2007-04-10: $176,122,693 from Wa-Sunset North Bellevue LLC to Sunset North Corporate Campus Property LLC (part of a 6-parcel sale; price is the whole deal), rec. 20070424000112

1998-07-13: $15,899,555 from Seattle University Et Al % R R Lee to WRC Sunset North LLC (part of a 6-parcel sale; price is the whole deal), rec. 199807131380

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 $16,544,000 (2011) to $24,887,000 (2026), up 50% over 15 years, per county tax rolls. The 2026 roll splits $24,887,000 into $3,057,900 land and $21,829,100 improvements.

Zoning: OLB (per King County)

Lot: 47,045 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 160,850 SF; Basement, Parking 55,786 SF (county building sections)

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

Permit history

2023-01-12: Remodel, declared value $80,000 (Screened), permit 22 118406 BZ

2022-09-01: Remodel, declared value $357,984 (Complete), permit 22 113883 BZ

2019-07-10: Remodel, declared value $4,296,000 (Screened), permit 19 105280 BZ

2019-04-02: Demolition (Screened), permit 19 109616 BC

2018-10-04: Remodel, declared value $485,000 (Screened), permit 18 124575 BZ

2018-09-12: Remodel, declared value $232,990 (Screened), permit 18 123856 BZ

2018-07-16: Remodel, declared value $1,875,114 (Screened), permit 18 111030 BZ

2018-05-21: Remodel, declared value $334,000 (Screened), permit 18 112366 BZ

2016-08-10: Remodel, declared value $60,000 (Screened), permit 16137182

2016-01-06: Remodel, declared value $261,000 (Screened), permit 15127122

Source: King County permit records (newest first).