NAICS 237990 · Other Heavy and Civil Engineering Construction

General engineering contractors in Middletown, CA

6 licensed general engineering contractors · every license checked against the issuer's file

More cities in California

Bakersfield 337San Francisco 307San Diego 273Sacramento 244Los Angeles 235Riverside 191San Jose 188Fresno 184Irvine 140Santa Rosa 134Corona 122Redding 119El Cajon 117Anaheim 116Oakland 111Temecula 110
362 listingsHow results are ordered
21

All Access Bobcat

Cotati, CA · (707) 792-7765

CA-CSLB 768985 · AGeneral engineering contractor
License activechecked Oct 24, 2026
CallDetails
22

All Bay Sewer Inc

Santa Rosa, CA · (415) 702-8626

CA-CSLB 1076969 · C34 C36General engineering contractorPlumber
License activechecked Oct 24, 2026
CallDetails
23

Analy Septic

Sebastopol, CA · (707) 823-7340

CA-CSLB 416663 · AGeneral engineering contractor
License activechecked Oct 24, 2026
CallDetails
25

Argonaut Constructors Inc

Santa Rosa, CA · (707) 542-4862

CA-CSLB 171432 · A B +2General engineering contractorGeneral contractorExcavation, grading and paving+1
License activechecked Oct 24, 2026
CallDetails
28

Bear State Construction

Sebastopol, CA · (707) 332-9091

CA-CSLB 795997 · A B +1General engineering contractorGeneral contractorAsbestos and hazardous materials abatement
License activechecked Oct 24, 2026
CallDetails
29

Beeler Inc

Santa Rosa, CA · (707) 888-8881

CA-CSLB 703920 · A HAZGeneral engineering contractorAsbestos and hazardous materials abatement
License activechecked Oct 24, 2026
CallDetails
31

Biogas Energy Inc

Sebastopol, CA · (707) 888-4316

CA-CSLB 957115 · AGeneral engineering contractor
License activechecked Oct 24, 2026
CallDetails
33

C&S Civil LLC

Lakeport, CA · (707) 489-9599

CA-CSLB 1079551 · AGeneral engineering contractor
License activechecked Oct 24, 2026
CallDetails
35

Calstroy

Guerneville, CA · (415) 250-3215

CA-CSLB 933697 · A B +2General engineering contractorGeneral contractorElectrician+1
License activechecked Oct 24, 2026
CallDetails
37

Cimino S J Electric Inc

Santa Rosa, CA · (707) 542-6231

CA-CSLB 343802 · A B +1General engineering contractorGeneral contractorElectrician
License activechecked Oct 24, 2026
CallDetails
38

Clifton Security Systems

Lakeport, CA · (707) 328-6171

CA-CSLB 793715 · A C10 +1General engineering contractorElectricianAsbestos and hazardous materials abatement
License activechecked Oct 24, 2026
CallDetails