The details on Cornerstone CNST & Dvlpmnt Inc
- WA L&I registration
- CORNECD755DM
- Registered as
- CORNERSTONE CNST & DVLPMNT INC
- Registration checked
- September 14, 2026
- Registered since
- 2025
- Expires
- March 2027
- Contractor bond
- $30,000 · Travelers Cas and Surety Co of America
- Liability insurance
- $1,000,000 · CANOPIUS US INSURANCE INC
- Insurance through
- March 2027
- Primary trade
- General Contractor
- L&I specialty
- GENERAL
- Registered principal
- Clow, Isaiah Michael · since 2025
- Service area
- Spokane
- Phone
- (509) 443-0252
- Website
- cornerstoneconstruction.com
Something here wrong or out of date? The business can claim this listing and correct it.
Questions worth asking Cornerstone CNST & Dvlpmnt Inc
Is Cornerstone CNST & Dvlpmnt Inc. licensed in Washington?
The number you want is CORNECD755DM — Cornerstone CNST & Dvlpmnt Inc.'s Washington State L&I contractor registration, expiring March 2027. Last checked September 14, 2026. Washington's contractor lookup is free and open if you want to confirm it today. On file alongside it: a $30,000 contractor bond (Travelers Cas and Surety Co of America) and $1,000,000 of liability insurance with CANOPIUS US INSURANCE INC through March 2027. Ask them to send the bond and insurance certificates over before the first day on site.
Does Cornerstone CNST & Dvlpmnt Inc. cover my part of Spokane?
Spokane is what they cover. A crew close to you is the one that comes back for a warranty call, so it is worth asking how far out they really travel.
How did Cornerstone CNST & Dvlpmnt Inc. end up on this page?
Cornerstone CNST & Dvlpmnt Inc. is licensed and working in the Spokane area — that's the whole bar for a page here. That registration is checked against Washington's record, and the date of the check is on this page for you to weigh. Cornerstone CNST & Dvlpmnt Inc. rates 4.7 out of 5 on Google across 14 reviews, and this page links straight to those reviews so you can read them for yourself.