115 W Mercer St, Seattle, WA 98119

Office · Seattle · Seattle-Bellevue metro, WA

Imagery suggests: other cre. 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 AI estimate from public imagery; may be outdated.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 59% of office buildings in Seattle (median 20,410 SF), derived from assessor records.

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Building size: 33,290 SF, King County Assessor
Lot size: 6,240 SF, King County Assessor
Year built: 2019, King County Assessor
Stories: 3, King County Assessor
Predominant use: Office Building, King County Assessor
Assessed value: $7,905,100, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $237.46/SF, derived from assessor records
Lot coverage: 533%, derived from assessor records
Vintage: 2010s vintage
Zoning: SM-UP 85 (M1), King County
County use code: Office Building
Construction (observed): metal, 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.

300 W Republican St, Seattle · 0.1 mi · 80,035 SF · built 2024 · assessed $296.68/SF
100 W Roy St, Seattle · 0.1 mi · 34,976 SF · built 1912 · assessed $179.74/SF
400 2nd Ave W, Seattle · 0.1 mi · 241,875 SF · built 2000 · assessed $123.18/SF
450 3rd Ave W, Seattle · 0.1 mi · 240,700 SF · built 2016 · assessed $172.64/SF
309 W Republican St, Seattle · 0.1 mi · 3,822 SF · built 1900 · assessed $385.03/SF
111 W Harrison St, Seattle · 0.1 mi · 4,301 SF · built 1951 · assessed $349.31/SF

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Sale history and market context

MakeMe Estimate: $8,536,571 (estimated market value), with a likely range of $8,312,945 to $11,279,162 (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.

Last sold: 2011-10-31 for $1,085,000 (recorded arm's-length sale).

Current ownership dates to 2013 (about 13 years) per recorded transfers.

2013-12-26: $2,475,000 from Abo Investments LLC to Private party (part of a 2-parcel sale; price is the whole deal), rec. 20131231000587

2011-10-31: $1,085,000 from Alchemy Investments LLC to Abo Investments LLC, rec. 20111101000159

2007-04-04: $1,400,000 from Pohl Family Limited Partnership to Alchemy Investments LLC, rec. 20070406001467

2 administrative transfers (no consideration), 1996 to 1996

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 $1,191,900 (2011) to $7,905,100 (2026), up 563% over 15 years, per county tax rolls. The 2026 roll splits $7,905,100 into $3,432,000 land and $4,473,100 improvements.

Zoning: SM-UP 85 (M1) (per King County)

Lot: 6,240 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Office Building 22,778 SF; Basement, Parking 10,512 SF (county building sections)

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

Permit history

2025-04-21: Electrical, declared value $500 (Screened), permit 7081738-EL

2024-04-16: Electrical, declared value $500 (Screened), permit 7019986-EL

2016-07-14: Demolition (Complete), permit 6535494

2016-02-24: Building, New, declared value $1 (Complete), permit 6411707

Source: King County permit records (newest first).