Mark William Construction

Cabinets, Millwork and Finish Carpentry · Mercer Island, WA · License #MARKWWC797BM

Registration expired per WA L&I as of Dec 11, 2025.

What do these mean?

Principals on record since 2021.

How confident can you be in Mark William Construction?

Are they licensed, bonded, and insured?

Registration expired per WA L&I as of Dec 11, 2025.

Source:License facts on this pageVerify at WA L&I

Are they who they say they are?

Not yet verified — Mark William Construction 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 Mercer Island.

Do they have jobs on record?

Not yet measured — Mark William Construction 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
Mar 18, 2021
Expiration date
Dec 11, 2025
UBI
604578656
Business type
Individual
Phone
(206) 841-5639
Location
Mercer Island, WA 98040

Source: WA L&I contractor registration — checked Nov 10, 2026. Applies to every row above.

Registration lapsed Dec 2025 per WA L&I records.

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Bond & insurance on file

What the bond and insurance requirements mean for homeowners

Registration as a specialty contractor in Washington requires a $15,000 surety bond on file with the Department of Labor & Industries; the general contractor requirement is $30,000.

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

NameStart date
Mark William St. MaryJan 14, 2021
What is a Cabinets, Millwork and Finish Carpentry contractor licensed to do in Washington?

This specialty registration covers building and installing cabinets, millwork, trim, and other finish carpentry. It is limited to this trade; broader remodeling work would fall under a general contractor registration. A $15,000 surety bond and general liability insurance, filed with WA L&I, are required for this registration.

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Subser doesn't have reviews or star ratings. This page shows Mark William Construction's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.

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Built from Washington State L&I public records, updated Nov 10, 2026. Subser doesn't do star ratings or reviews — just verified records.