Locking Mailbox Installers INC

Concrete · Shoreline, WA · License #LOCKIMI860OW

Locking Mailbox Installers INC is one of 4 Concrete contractors registered in Shoreline, registered with WA L&I since 2014. Current filings: $15,000 surety bond (continuous) and $1,000,000 liability coverage through Feb 16, 2027. A surety bond has been on file since 2014.

How confident can you be in Locking Mailbox Installers INC?

Are they licensed, bonded, and insured?

Active license, $15,000 bond and $1,000,000 liability on file — checked against WA L&I records, updated daily.

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

Are they who they say they are?

Not yet verified — Locking Mailbox Installers INC 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 Shoreline.

Do they have jobs on record?

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License facts

License type
CONSTRUCTION CONTRACTOR
Effective date
Sep 16, 2014
Expiration date
Oct 3, 2028
UBI
602636030
Business type
Corporation
Phone
(206) 715-0421
Location
Shoreline, WA 98177

Source: WA L&I contractor registration — checked Nov 11, 2026. Applies to every row above.

Registration is current through Oct 2028.

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Bond & insurance on file

Bond firmAmountEffectiveExpiration
Ohio Cas Ins Co$15,000Jul 1, 2024Continuous — until canceled
American Contractors Indem CO$6,000Sep 8, 2014Canceled Oct 30, 2022
Ohio Cas Ins Co$6,000Sep 8, 2022Jul 1, 2024
Insurance companyAmountAgencyEffectiveExpiration
Ohio Security Ins Co$1,000,000LIBERTY MUTUAL AGENCY CORPFeb 16, 2022Feb 16, 2027
What the bond and insurance requirements mean for homeowners

To register as a specialty contractor in Washington, a business must file a $15,000 surety bond with the Department of Labor & Industries; general contractors file $30,000. This contractor's current filing shows a $15,000 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

NameStart date
Mary Patricia MaddenSep 16, 2014
Stephen William HolmquistSep 16, 2014
What is a Concrete contractor licensed to do in Washington?

A concrete specialty contractor is registered with WA L&I to form, pour, and finish concrete — foundations, slabs, driveways, sidewalks, and similar flatwork or structural concrete. The registration covers concrete work only. As a condition of registration, contractors in this category file a $15,000 surety bond and proof of general liability insurance with WA L&I. Washington currently lists 4 Concrete contractors registered in Shoreline.

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Subser doesn't have reviews or star ratings. This page shows Locking Mailbox Installers INC'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 11, 2026. Subser doesn't do star ratings or reviews — just verified records.