General contractor · Renton, WA

Diamond Septic LLC

Active Washington registration DIAMOSL751RJ · per L&I records

LicensedBondedInsured

Is Diamond Septic LLC Licensed?

Washington L&I records list Diamond Septic LLC with registration number DIAMOSL751RJ and status ACTIVE, valid until Dec 18, 2027. The business address on file is in Renton, WA 98059.

License Details

License #: DIAMOSL751RJ
Status: ACTIVE
License type: Construction Contractor
Specialty: General
First effective: Dec 18, 2025
Expires: Dec 18, 2027
Business type: Limited Liability Company
UBI (state business ID): 605977403
City: Renton, WA 98059

Bond and Insurance on File

Surety bond: $30,000 · Nationwide Mutual Ins Co
Effective Oct 13, 2025 · Until Canceled
Liability insurance: $2,000,000 · State Farm Fire & Cas Co
Expires Jan 29, 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 413 days left before it expires on Dec 18, 2027. Check that date against your project timeline.

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

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 DIAMOSL751RJ or UBI 605977403. The status there is the official one.
Check that the name on your bid or contract matches Diamond Septic 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 State Farm Fire & Cas Co 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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