1300 SW 27th St, Renton, WA 98057

Office · Renton · Seattle-Bellevue metro, WA

Imagery suggests: corporate office campus, 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 AI estimate from public imagery; may be outdated.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 227 reachable office buildings in Renton. Larger than 97% of office buildings in Renton (median 7,789 SF), derived from assessor records.

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Building size: 261,402 SF, King County Assessor
Lot size: 729,963 SF, King County Assessor
Year built: 2017, King County Assessor
Stories: 3, King County Assessor
Buildings on parcel: 2, King County Assessor
Predominant use: Office Building D, King County Assessor
Assessed value: $36,760,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $140.63/SF, derived from assessor records
Lot coverage: 36%, derived from assessor records
Vintage: 2010s vintage
Zoning: CO, King County
County use code: Office Park
Parking (observed): surface lot, AI estimate from public imagery

Nearby comparable buildings

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

2700 Naches Ave SW, Renton · 0.2 mi · 108,673 SF · built 2007 · assessed $328.19/SF
2985 Naches Ave SW, Renton · 0.3 mi · 36,000 SF · built 2008 · assessed $291/SF
1901 Oakesdale Ave SW, Renton · 0.3 mi · 332,798 SF · built 1998 · assessed $65.99/SF
1301 SW 16th St, Renton · 0.5 mi · 617,238 SF · built 1993 · assessed $123.80/SF
2201 Lind Ave SW, Renton · 0.6 mi · 114,000 SF · built 1987 · assessed $128.82/SF
2001 Lind Ave SW, Renton · 0.6 mi · 168,492 SF · built 1991 · assessed $121.88/SF

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Sale history and market context

MakeMe Estimate: $40,941,925 (estimated market value), with a likely range of $39,869,402 to $54,095,565 (half of recent verified sales in this segment landed inside that range). Based on 185 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Current ownership dates to 2018 (about 8 years) per recorded transfers.

2018-11-30: $19,510,631 from Ryan Renton LLC to Kaiser Foundation Health Plan of Washington (part of a 4-parcel sale; price is the whole deal), rec. 20181130000779

2018-11-27: transfer from Ryan-GHC Two LLC to Private party (part of a 4-parcel sale; price is the whole deal), rec. 20181127000934

2015-12-11: $14,599,260 from Longacres Park INC to Ryan-GHC Two LLC (part of a 7-parcel sale; price is the whole deal), rec.

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 $3,710,900 (2011) to $36,760,000 (2026), up 891% over 15 years, per county tax rolls. The 2026 roll splits $36,760,000 into $19,344,000 land and $17,416,000 improvements.

Zoning: CO (per King County)

Lot: 729,963 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Private

Street surface: Paved

Floor and use mix: Office Building 261,402 SF (county building sections)

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

Permit history

2017-12-26: Electrical, declared value $106,750 (Screened), permit E17006068

2016-12-16: Electrical, declared value $3,869,988 (Complete), permit E16005926

2016-10-19: Remodel, declared value $15,475,118 (Complete), permit B16003592

2016-10-10: Remodel, declared value $140,000 (Complete), permit B16002271

2016-10-07: Other, declared value $700,000 (Complete), permit M16005548

2016-09-22: Electrical, declared value $650,000 (Complete), permit E16005314

2016-09-22: Electrical, declared value $550,000 (Complete), permit E16005315

2016-07-29: Remodel, declared value $12,749,482 (Complete), permit B16003371

2016-06-27: Other, declared value $700,000 (Complete), permit M16003558

2016-04-11: Electrical, declared value $884,923 (Complete), permit E16000489

Source: King County permit records (newest first).