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Licensed General Engineering Contractors in Ontario, California

Updated November 1, 2026 from CSLB's public license file · A General Engineering Contractor

  • 61licensed general engineering contractors
  • 60active (Clear)
  • 1.6%with a suspension
  • 19.7%workers' comp exempt
  • 14.5 yrsmedian time licensed
  • 90.2%corp / LLC / partnership (9.8% sole owner)
  • 1new in the last 12 months
  • —change tracking began November 1, 2026

CSLB's public data lists 61 general engineering contractors with a mailing address in Ontario, and 60 of them (98.4%) show a Clear primary status.

The share with a suspension, 1.6%, is 2.1 points lower than the San Bernardino County rate for the same license (3.7%). 19.7% report a workers' comp exemption, 15.7 points lower than the statewide figure for general engineering contractors (35.4%), so many of these businesses say they have no employees.

Experience varies: 62.3% have been licensed 10+ years and 1 is new this year (median 14.5 years, vs 18.5 statewide).

These firms hold CSLB's A (General Engineering Contractor) license for engineered fixed works. See the A General Engineering Contractor guide for what the license covers.

How to check a general engineering contractor's license in Ontario

  1. Open the general engineering contractor's profile from the table below (or search Ontario listings by name). Check that A appears among its classifications and that the primary status reads Clear. What A covers.
  2. Re-check the same number on CSLB's Instant License Check the day you sign; our copy is refreshed weekly and 1.6% of Ontario 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 general engineering contractor is required by law. See the $1,000 rule.

50 of 61 general engineering contractors in Ontario

Ontario general engineering 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 general engineering contractors in Ontario
Business nameLicense #StatusYearsWorkers' compBond
Gregg Electric INC 201042 Clear 65 Insured On file
Theilacker Rudolf Carl Contractor 279711 Clear 54 Exempt On file
C P Construction CO INC 304795 Clear 51 Insured On file
Pascal & Ludwig Constructors INC 373525 Clear 47 Exempt On file
Spraggins A C Engineering & Underground INC 383440 Clear 47 Insured On file
Spec Construction CO INC 419626 Clear 44 Insured On file
Anton Construction 461541 Clear 42 Exempt On file
Cgo Construction Company INC 532200 Clear 38 Insured On file
Abc Resources INC 538680 Clear 38 Insured On file
Doja INC 597764 Clear 36 Insured On file
Fairchild Plumbing & Mechanical INC 606705 Clear 35 Insured On file
Ace Engineering INC 613320 Clear 35 Insured On file
Premier Paving INC 638301 Clear 34 Insured On file
Cash Grading Contractors INC 756412 Clear 27 Exempt On file
Yacko John 764923 Clear 27 Exempt On file
Jewels Construction INC 770969 Clear 27 Insured On file
Hhs Construction LLC 818906 Clear 23 Insured On file
Envirokinetics INC 828248 Clear 22 Insured On file
Primebore Directional Boring Corp 847499 Clear 22 Insured On file
Commercial Concrete Constructors INC 858888 Clear 21 Insured On file
Mc Ghee Construction INC 884036 Clear 20 Insured On file
Progressive Fueling Construction INC 894043 Clear 19 Insured On file
Powerhouse Grading INC 909465 Clear 18 Insured On file
Garcon Construction INC 913550 Clear 18 Insured On file
Arijet Corporation 916562 Clear 18 Insured On file
Kemcorp Construction INC 934522 Clear 17 Insured On file
Power Grade INC 935306 Clear 17 Insured On file
Proffitt Excavating INC 952224 Clear 16 Insured On file
Marlu Construction 960949 Clear 15 Insured On file
Constru One INC 972427 Clear 14 Insured On file
G V C O Construction INC 980998 Clear 13 Exempt On file
Turbine Repair Services LLC 981674 Clear 13 Insured On file
Jn Construction INC 1001396 Clear 11 Insured On file
Inland Design Build 1005429 Clear 11 Insured On file
Burke Dees Engineering Constructors LLC 1012305 Clear 10 Insured On file
Yacko Construction INC 1012085 Clear 10 Insured On file
High Speed Rooter and Plumbing INC 1017796 Clear 10 Insured On file
Robert Alan Construction INC 1022004 Clear 9 Insured On file
Leothacue Enterprises INC 1025024 Clear 9 Exempt On file
Earthscapes 1027517 Clear 9 Insured On file
Choice Builder Solutions LLC 1032593 Clear 9 Insured On file
Jaber Mehdi 1034053 Clear 8 Insured On file
Foxtrot Construction 1035680 Clear 8 Insured On file
M J Pacific INC 1051869 Clear 7 Insured On file
Sitelogiq INC 1054171 Clear 7 Insured On file
Riptide Industries 1056742 Clear 7 Insured On file
Crown Communications Engineering INC 1062965 Clear 6 Insured On file
Acosta Pipeline INC 1064810 Clear 6 Insured On file
Kormex Construction INC 1073142 Clear 5 Insured On file
Cai Fall Protection Systems 1077144 Clear 5 Insured On file

See all 61 general engineering contractors in Ontario

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 general engineering contractors are in Ontario?

CSLB's current public file lists 61 general engineering contractors with a Ontario mailing address. 60 have a Clear status, and 83.6% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a general engineering contractor need in California?

These firms hold CSLB's A (General Engineering Contractor) license for engineered fixed works. 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 general engineering contractor's workers' comp?

Open the contractor's profile here to see the workers' comp type and insurer from CSLB's file. In Ontario, 80.3% of general engineering contractors list a policy, 19.7% 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