Washington contractor license
DIAMOND CONSTRUCTION
- CC-SU Sanitation System / Side Sewers
DIAMOND CONSTRUCTION is a CC-SU Sanitation System / Side Sewers contractor in Oak Harbor, licensed in Washington for 28 years (since 1998). As of Oct 28, 2026, state records list the license as expired, with an expiration date of Oct 15, 2025 and no license bond is on file.
DIAMOND CONSTRUCTIONCC-SU Sanitation System / Side Sewers · checked Oct 28, 2026
ExpiredLicense number#DIAMOC*021D7
Licensed sinceMar 27, 1998
Years licensed28 years
Expiration on recordOct 15, 2025
City and countyOak Harbor
License bondNot on file
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Source: Washington State Department of Labor & Industries (L&I) contractor records. Last updated Oct 28, 2026. Page refreshed Nov 4, 2026.