General contractor · Seattle, WA

Tandem Construction

Active Washington registration TANDEC*040R4 · per L&I records

LicensedBondedInsured

Is Tandem Construction Licensed?

Washington L&I records list Tandem Construction with registration number TANDEC*040R4 and status ACTIVE, valid until May 16, 2027. The business address on file is in Seattle, WA 98178.

License Details

License #: TANDEC*040R4
Status: ACTIVE
License type: Construction Contractor
Specialty: General
First effective: Dec 24, 1996
Expires: May 16, 2027
Business type: Individual
UBI (state business ID): 604120772
City: Seattle, WA 98178

Bond and Insurance on File

Surety bond: $30,000 · Western Surety Co
Effective May 16, 2025 · Until Canceled
Liability insurance: $300,000 · Ohio Security Ins Co
Expires Jun 9, 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 197 days left before it expires on May 16, 2027. Check that date against your project timeline.

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

How This Record Compares in Seattle

Tandem Construction has held registration TANDEC*040R4 for 29.8 years. The median for the 2,643 active general contractors with a Seattle address is 6.2 years, and 928 of them have held their registration for 10 years or more, so this registration is among the longer-held ones. 383 of them registered in the last 12 months.

99% of these Seattle 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

Dec 24, 1996: Current registration TANDEC*040R4 took effect.
May 16, 2025: $30,000 surety bond with Western Surety Co took effect.
Oct 30, 2026: Our copy of the L&I record was taken.
May 16, 2027: Registration expires unless renewed.
Jun 9, 2027: Ohio Security Ins Co liability policy on file expires.

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 TANDEC*040R4 or UBI 604120772. The status there is the official one.
Check that the name on your bid or contract matches Tandem Construction exactly (a individual).
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 Ohio Security Ins 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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