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Licensed Limited Specialty Contractors in Walnut, California

Updated November 1, 2026 from CSLB's public license file · C-61 Limited Specialty

  • 21licensed limited specialty contractors
  • 20active (Clear)
  • 4.8%with a suspension
  • 42.9%workers' comp exempt
  • 19.4 yrsmedian time licensed
  • 61.9%corp / LLC / partnership (38.1% sole owner)
  • 0new in the last 12 months
  • —change tracking began November 1, 2026

There are 21 limited specialty contractors based in Walnut in CSLB's current file. 20 (95.2%) have a Clear status as of November 1, 2026.

The share with a suspension (4.8%) is close to the Los Angeles County rate for the same license (5.1%). 42.9% report a workers' comp exemption, 6.7 points higher than the statewide figure for limited specialty contractors (36.2%), so many of these businesses say they have no employees.

Experience varies: 81% have been licensed 10+ years and 0 are new this year (median 19.4 years, vs 13 statewide).

C-61 licenses are always paired with a D-subcategory that names the specific trade, so check the "D" code on each profile. See the C-61 Limited Specialty guide for what the license covers.

How to check a limited specialty contractor's license in Walnut

  1. Open the limited specialty contractor's profile from the table below (or search Walnut listings by name). Check that C-61 appears among its classifications and that the primary status reads Clear. What C-61 covers.
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 4.8% of Walnut listings here already show a suspension.
  3. Get the bid and contract in writing with the license number on it. If the job tops $1,000 in labor and materials, a licensed limited specialty contractor is required by law. See the $1,000 rule.

All 21 limited specialty contractors in Walnut

Walnut limited specialty contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed limited specialty contractors in Walnut
Business nameLicense #StatusYearsWorkers' compBond
Vogel Construction Company 206453 Clear 64 Insured On file
United Riggers & Erectors INC 245451 Clear 60 Insured On file
Advance Windows & Doors 417549 Clear 44 Exempt On file
Diversified Coatings & Linings CO 470843 Clear 41 Insured On file
L R Locksmithing 527795 Clear 38 Exempt On file
Advanced Aluminum Awning CO 575140 Clear 37 Insured On file
United Industrial Contractors 674403 Clear 33 Insured On file
Louis Doors Garage Door Specialties INC 733583 Clear 29 Insured On file
Tropical Tree Service INC 760901 Clear 27 Insured On file
S L Specialties of Southern California INC 856062 Clear 21 Insured On file
Diamond Doors 898716 Clear 19 Exempt On file
California Garage Door Service INC 926317 Clear 17 Insured On file
Claypool Frank Concrete Cutting INC 938332 Clear 17 Insured On file
Window Technique U.S.A 954479 Clear 16 Exempt On file
Santos Sprinklers 967788 Clear 15 Exempt On file
De Jong Arnold 1000660 Clear 11 Exempt On file
Atlas Construction Clean-Up Services 1038375 Clear 8 Exempt On file
Corona Air and Water Balancing 1051200 Clear 7 Insured On file
Us Door 1116260 Clear 2 Insured On file
Peter Urrutia 1141524 Clear 1 Exempt On file
Access Doors 984988 Susp: contractor's bond 13 Exempt On file

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed limited specialty contractors are in Walnut?

CSLB's current public file lists 21 limited specialty contractors with a Walnut mailing address. 20 have a Clear status, and 81% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a limited specialty contractor need in California?

C-61 licenses are always paired with a D-subcategory that names the specific trade, so check the "D" code on each profile. Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

How do I check a limited specialty contractor's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Walnut, 57.1% of limited specialty contractors list a policy, 42.9% claim an exemption and 0% show no current coverage. Confirm the policy with CSLB's workers' comp search before work starts. How to check workers' comp.

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Guides