Washington L&I Data · Updated Oct 30, 2026Free and Independent · Not a Government Site

General contractor · Sammamish, WA

Diamond Development LLC

Active  Washington registration DIAMODL754NF · per L&I records

LicensedBondedInsured

Is Diamond Development LLC Licensed?

Washington L&I records list Diamond Development LLC with registration number DIAMODL754NF and status ACTIVE, valid until Aug 15, 2027. The business address on file is in Sammamish, WA 98075.

License Details

License #
DIAMODL754NF
Status
ACTIVE
License type
Construction Contractor
Specialty
General
First effective
Aug 15, 2025
Expires
Aug 15, 2027
Business type
Limited Liability Company
UBI (state business ID)
604843089
City
Sammamish, WA 98075

Bond and Insurance on File

Surety bond
$30,000 · Nationwide Mutual Ins Co
Effective Apr 28, 2025 · Until Canceled
Liability insurance
$300,000 · BERKSHIRE HATHAWAY DIRECT INSU
Expires Apr 28, 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 288 days left before it expires on Aug 15, 2027. Check that date against your project timeline.

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

How This Record Compares in Sammamish

Diamond Development LLC has held registration DIAMODL754NF for 1.2 years. The median for the 117 active general contractors with a Sammamish address is 5.1 years, and 34 of them have held their registration for 10 years or more, so this registration is newer than most in Sammamish. 19 of them registered in the last 12 months.

100% of these Sammamish 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 $300,000, which is below that median. Insurance amounts are what the insurer reported to L&I; they are not a rating of the business.

Record Timeline

  • Apr 28, 2025: $30,000 surety bond with Nationwide Mutual Ins Co took effect.
  • Aug 15, 2025: Current registration DIAMODL754NF took effect.
  • Oct 30, 2026: Our copy of the L&I record was taken.
  • Apr 28, 2027: BERKSHIRE HATHAWAY DIRECT INSU liability policy on file expires.
  • Aug 15, 2027: Registration expires unless renewed.

Checks for General Contractors

How to Verify This Contractor

  1. Use the Confirm on L&I Verify button and search registration DIAMODL754NF or UBI 604843089. The status there is the official one.
  2. Check that the name on your bid or contract matches Diamond Development LLC exactly (a limited liability company).
  3. On L&I Verify, look for bond claims, lawsuits and any newer registration.
  4. Ask for a certificate of insurance sent directly by the insurer, and compare it with the BERKSHIRE HATHAWAY DIRECT INSU policy on file.

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

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

Other General Contractors in Sammamish

Active general contractor registrations with a Sammamish address in the same L&I file. Listing here is not an endorsement.

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.

Is This Your Business?

Claim this free listing to add a description, photos and a website link, or join the featured waitlist.

Claim Your Listing or Get Featured on Verified Licensed

Something wrong or want this profile removed? Use the correction or removal request form.