The details on Cornerstone Plumbing LLC
- WA L&I registration
- CORNEPL798NZ
- Registration checked
- July 27, 2026
- Registered since
- 2021
- Expires
- August 2027
- Contractor bond
- $6,000 · Ohio Cas Ins Co
- Liability insurance
- $1,000,000 · NATIONWIDE GENERAL INSURANCE C
- Insurance through
- July 2027
- Primary trade
- Plumbing
- L&I specialty
- JOURNEY LEVEL
- Registered principal
- PARKS, MICHAEL WESLEY · since 2021
- Service area
- Spokane Valley
Something here wrong or out of date? The business can claim this listing and correct it.
Questions worth asking Cornerstone Plumbing LLC
Is Cornerstone Plumbing LLC licensed in Washington?
Cornerstone Plumbing LLC holds Washington State (L&I) contractor registration CORNEPL798NZ, expiring August 2027. We verified it against the state record on July 27, 2026, and you can check the same number on Washington's contractor lookup in about a minute. L&I also lists a $6,000 contractor bond (Ohio Cas Ins Co) and $1,000,000 of liability insurance with NATIONWIDE GENERAL INSURANCE C through July 2027. Ask for proof of bond and current insurance before work starts.
What areas does Cornerstone Plumbing LLC serve?
Spokane Valley. Service areas change, so confirm they cover your address when you call.
How did Cornerstone Plumbing LLC end up on this page?
Cornerstone Plumbing LLC is licensed and working in the Spokane area — that's the whole bar for a page here. We check that registration against the state's own record and date the check on this page, so you can see for yourself how current it is.