Cornerstone Constructors LLC
General · Fox Island, WA · License #CORNECL887LM
Cornerstone Constructors LLC is one of 51 General contractors registered in Fox Island, registered with WA L&I since 2012. Registered longer than roughly half of General contractors in Fox Island. Current filings: $30,000 surety bond (continuous) and $1,000,000 liability coverage through Mar 12, 2027.
How confident can you be in Cornerstone Constructors LLC?
Are they licensed, bonded, and insured?
Active license, $30,000 bond and $1,000,000 liability on file — checked against WA L&I records, updated daily.
Are they who they say they are?
Not yet verified — Cornerstone Constructors LLC hasn't claimed this listing. Own this business? Claim it free.
Do other pros stand behind them?
No endorsements yet from other licensed contractors in Fox Island.
Do they have jobs on record?
Not yet measured — Cornerstone Constructors LLC hasn't run jobs through Subser. Performance data comes from real jobs, not reviews.
Subser doesn't do star ratings or reviews — just verified records. What do these mean?
License facts
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Jun 14, 2012
- Expiration date
- Nov 19, 2026
- UBI
- 603208602
- Business type
- Limited Liability Company
- Phone
- (253) 377-5803
- Location
- Fox Island, WA 98333
Source: WA L&I contractor registration — checked Nov 12, 2026. Applies to every row above.
Registration is current through Nov 2026.
Is this your business? Claim it free to verify ownership — takes about two minutes.
Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| Contractors Bonding & Insurance Co | $30,000 | Oct 30, 2024 | Continuous — until canceled |
| Contractors Bonding & Insurance Co | $12,000 | Jun 14, 2012 | Oct 30, 2024 |
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| Ohio Security Ins Co | $1,000,000 | WHITFIELD UNITED INSURANCE | Mar 12, 2026 | Mar 12, 2027 |
What the bond and insurance requirements mean for homeowners
Registration as a general contractor in Washington requires a $30,000 surety bond on file with the Department of Labor & Industries. This contractor's current filing shows a $30,000 bond.
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
Principals
| Name | Start date |
|---|---|
| Kevin Russell Mackay | Oct 18, 2022 |
| Jeffery Michael Mackay | Jun 14, 2012 |
| Russell Carlisle Mackay | Jun 14, 2012 |
What is a General contractor licensed to do in Washington?
A general contractor in Washington is registered with the Department of Labor & Industries to perform or oversee work in multiple building trades. General contractors can take on whole projects — remodels, additions, new construction — and can hire specialty subcontractors for individual trades. A $30,000 surety bond and general liability insurance, filed with WA L&I, are required for this registration. Washington currently lists 51 General contractors registered in Fox Island.
Looking for reviews of Cornerstone Constructors LLC?
Subser doesn't have reviews or star ratings. This page shows Cornerstone Constructors LLC's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
Own Cornerstone Constructors LLC? Claim the listing free. Worked with Cornerstone Constructors LLC? Endorse them from your own listing.
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Browse the directory
Built from Washington State L&I public records, updated Nov 12, 2026. Subser doesn't do star ratings or reviews — just verified records.