1145 12th Ave NW, Issaquah, WA 98027

Small-Bay Industrial · Issaquah · Seattle-Bellevue metro, WA

One of 59 reachable small-bay industrial buildings in Issaquah. Larger than 86% of small-bay industrial buildings in Issaquah (median 14,796 SF), derived from assessor records.

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Building size: 96,000 SF, King County Assessor
Lot size: 304,037 SF, King County Assessor
Year built: 1980, King County Assessor
Stories: 1, King County Assessor
Buildings on parcel: 6, King County Assessor
Predominant use: Bldg D (9 Suites), King County Assessor
Assessed value: $31,806,000, per the King County Assessor (not a market appraisal)
Assessed value per building SF: $331.31/SF, derived from assessor records
Lot coverage: 32%, derived from assessor records
Vintage: 1980s vintage
Zoning: UC, King County
County use code: Warehouse
Construction (observed): metal, AI estimate from public imagery
Parking (observed): surface lot, 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.

1510 NW Maple St, Issaquah · 0.1 mi · 15,880 SF · built 1972 · assessed $156.30/SF
1505 NW Mall St, Issaquah · 0.2 mi · 4,000 SF · built 1976 · assessed $179.63/SF
1555 NW Mall St, Issaquah · 0.2 mi · 8,000 SF · built 1975 · assessed $225/SF
1680 NW Maple St, Issaquah · 0.2 mi · 11,640 SF · built 1969 · assessed $141.63/SF
1430 NW Mall St, Issaquah · 0.2 mi · 16,200 SF · built 1984 · assessed $421.59/SF
1655 NW Mall St, Issaquah · 0.2 mi · 9,700 SF · built 1987 · assessed $342/SF

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Sale history and market context

MakeMe Estimate: $39,905,304 (estimated market value), with a likely range of $30,843,755 to $40,304,357 (half of recent verified sales in this segment landed inside that range). Based on 81 verified arm's-length comparable sales (through 2026-05-29). Not an appraisal. How this estimate works.

Last sold: 2021-04-16 for $36,050,000 (recorded arm's-length sale).

Current ownership dates to 2021 (about 5 years) per recorded transfers.

2021-04-16: $36,050,000 from Sterling Realty Organization CO to Cascade Business Park LLC, rec. 20210416000942

2010-09-30: $15,600,000 from Cascade Business Park Issaquah LLC to Sterling Realty Organization CO, rec. 20100930001017

2003-01-22: $9,942,500 from Cascade Business Park Limited Partnership to Cascade Business Park Issaquah LLC, rec. 20030122001035

1994-06-27: transfer from Private party to Issaquah City of (non-market transfer), rec. 199409091122

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 $10,622,100 (2011) to $31,806,000 (2026), up 199% over 15 years, per county tax rolls. The 2026 roll splits $31,806,000 into $12,161,400 land and $19,644,600 improvements.

Zoning: UC (per King County)

Lot: 304,037 sq ft

Water: Water District (per King County)

Sewer: Public (per King County)

Access: Public

Street surface: Paved

Floor and use mix: Industrial Flex Buildings 96,000 SF (county building sections)

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

Permit history

2026-04-20: Other, declared value $50,000, permit MEC26-00038

2025-10-16: Remodel, declared value $65,000, permit BLD25-00293

2024-06-05: Remodel, declared value $44,750 (Complete), permit BLD24-00003

2024-03-14: Plumbing, declared value $800 (Complete), permit PLM24-00026

2024-02-07: Other, declared value $6,500 (Complete), permit MEC23-00640

2023-11-25: Plumbing, declared value $12,000 (Complete), permit PLM23-00146

2023-07-28: Plumbing, declared value $13,000 (Complete), permit PLM23-00084

2022-12-12: Remodel, declared value $75,000 (Complete), permit BLD22-00155

2019-07-26: Remodel, declared value $35,000 (Complete), permit BLD19-00125

2019-01-17: Other, declared value $12,000 (Complete), permit MEC19-00018

Source: King County permit records (newest first).