Washington contractor license
WILLIAMSON LANDSCAPE ARCH LLC
- EC-06 Limited Energy
- EC-6A Limited Energy
WILLIAMSON LANDSCAPE ARCH LLC is an EC-06 Limited Energy and EC-6A Limited Energy contractor in Seattle, licensed in Washington for 24 years (since 2001). As of Oct 28, 2026, the license is active with an expiration date of Dec 31, 2027 on record and a license bond is on file.
WILLIAMSON LANDSCAPE ARCH LLCEC-06 Limited Energy · EC-6A Limited Energy · checked Oct 28, 2026
ActiveLicense number#WILLILA996RU
Licensed sinceDec 31, 2001
Years licensed24 years
Expiration on recordDec 31, 2027
City and countySeattle
License bondOn 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.