General contractor · Auburn, WA

Mount Brothers Const LLC

Active Washington registration MOUNTBC835CS · per L&I records

LicensedBondedInsured

Is Mount Brothers Const LLC Licensed?

Washington L&I records list Mount Brothers Const LLC with registration number MOUNTBC835CS and status ACTIVE, valid until May 15, 2028. The business address on file is in Auburn, WA 98002.

License Details

License #: MOUNTBC835CS
Status: ACTIVE
License type: Construction Contractor
Specialty: General
First effective: Feb 10, 2017
Expires: May 15, 2028
Business type: Limited Liability Company
UBI (state business ID): 604069310
City: Auburn, WA 98002

Bond and Insurance on File

Surety bond: $30,000 · American Contractors Indem CO
Effective May 12, 2026 · Until Canceled
Liability insurance: $1,000,000 · Kinsale Insurance Company
Expires Aug 14, 2027

What Active Status Means

The registration is current: L&I has a bond and liability insurance on file and the term has not ended. ACTIVE is necessary but not sufficient, so also check the expiry date, the bond and the insurance below.

Can this business work under this registration? Can work while it stays active.

The registration has 562 days left before it expires on May 15, 2028. Check that date against your project timeline.

All status codes are explained in Washington Contractor License Statuses Explained.

How This Record Compares in Auburn

Mount Brothers Const LLC has held registration MOUNTBC835CS for 9.7 years. The median for the 1,018 active general contractors with an Auburn address is 4.9 years, and 272 of them have held their registration for 10 years or more, so this registration is at or above the local median. 142 of them registered in the last 12 months.

100% of these Auburn records have a surety bond on file and 100% have liability insurance on file. The median insurance amount on file is $1,000,000; this business lists $1,000,000, which is equal to that median. Insurance amounts are what the insurer reported to L&I; they are not a rating of the business.

Record Timeline

Feb 10, 2017: Current registration MOUNTBC835CS took effect.
May 12, 2026: $30,000 surety bond with American Contractors Indem CO took effect.
Oct 30, 2026: Our copy of the L&I record was taken.
Aug 14, 2027: Kinsale Insurance Company liability policy on file expires.
May 15, 2028: Registration expires unless renewed.

Checks for General Contractors

General contractors must file a $30,000 surety bond (RCW 18.27.040, effective July 1, 2024). This record lists a $30,000 bond. See General vs Specialty Contractor Registration in Washington.
Use a general contractor when the project involves more than one trade. Subcontractors on your job must be registered too.
Compare bids on scope, schedule and payment terms, not just the total.
More detail: How to Choose a General Contractor in Washington.

How to Verify This Contractor

Use the Confirm on L&I Verify button and search registration MOUNTBC835CS or UBI 604069310. The status there is the official one.
Check that the name on your bid or contract matches Mount Brothers Const LLC exactly (a limited liability company).
On L&I Verify, look for bond claims, lawsuits and any newer registration.
Ask for a certificate of insurance sent directly by the insurer, and compare it with the Kinsale Insurance Company policy on file.

A full walkthrough is in How to Check a Contractor License in Washington.

Record data as of Oct 30, 2026, from the Washington L&I contractor file.

Accuracy notice. Data from Washington L&I open data (public domain, PDDL), not affiliated with any government. Records change; confirm on the official L&I Verify tool before hiring. Search other businesses with the Washington contractor license lookup.

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