Top-Rated Contractors in Rancho Cucamonga

50 verified

These contractors have SiteVetter Safety Scores of 85+ out of 100, indicating strong compliance with licensing, insurance, bonding, and federal requirements.

A SiteVetter Safety Score is a proprietary 0-100 compliance rating that aggregates contractor data from six sources: California Contractors State License Board (CSLB), SAM.gov federal exclusions, OSHA safety inspections, Department of Labor wage records, EPA environmental compliance, and building permit records from major California cities. In Rancho Cucamonga, CA, 50 contractors currently hold Safety Scores of 85 or above, qualifying them as “top-rated” for 2026.

How We Calculate Safety Scores

Our Safety Score aggregates data from 6 sources: CSLB license status, workers' compensation coverage, contractor bonding, federal databases including SAM.gov (debarment), OSHA (safety violations), DOL (wage violations), and building permits. Scores of 85+ indicate contractors with active licenses, proper insurance, and clean federal records.

Top 50 Contractors by Safety Score

Ranked by SiteVetter Safety Score, highest first

#1

Gunby INC

License #937732 · C39

95/100

Grade A · Excellent

#2

Gus Electric INC

License #960644 · C10

95/100

Grade A · Excellent

#3

U S a Plumbing Service Incorporated

License #961844 · C36

95/100

Grade A · Excellent

#4

Premier Service Group Enterprise INC

License #975801 · C20

95/100

Grade A · Excellent

#5

Dunn Plumbing Heating & Air Conditioning INC

License #712182 · C20

95/100

Grade A · Excellent

#6

K C E Electric INC

License #506736 · C10

95/100

Grade A · Excellent

#7

MC Leod Scott Plumbing INC

License #678352 · C36

95/100

Grade A · Excellent

#8

RC Air LLC

License #445508 · C20

95/100

Grade A · Excellent

#9

Islas Excavating & Demo

License #287257 · C12

95/100

Grade A · Excellent

#10

Montgomery Hardware CO

License #285746 · B

95/100

Grade A · Excellent

#11

Air Conditioning Engineering INC

License #236962 · C20

95/100

Grade A · Excellent

#12

Baldy Electric INC

License #318457 · A

95/100

Grade A · Excellent

#13

J R N Engineering

License #357442 · A

95/100

Grade A · Excellent

#14

Goss Construction CO INC

License #378377 · A

95/100

Grade A · Excellent

#15

Bobs Roofing

License #384575 · C39

95/100

Grade A · Excellent

#16

Trl Systems Incorporated

License #413747 · C10

95/100

Grade A · Excellent

#17

Harrington Construction CO INC

License #463572 · B

95/100

Grade A · Excellent

#18

Owen Electric INC

License #468212 · C10

95/100

Grade A · Excellent

#19

Passage Supply INC

License #471431 · B

95/100

Grade A · Excellent

#20

Superior Tank CO INC

License #472119 · A

95/100

Grade A · Excellent

#21

R E F Industries INC

License #480175 · C43

95/100

Grade A · Excellent

#22

Akita Mitsuyoshi

License #485220 · B

95/100

Grade A · Excellent

#23

Sonwest Air Conditioning INC

License #486917 · C20

95/100

Grade A · Excellent

#24

Ram - CO INC

License #487934 · C10

95/100

Grade A · Excellent

#25

D & R Glass INC

License #488564 · C17

95/100

Grade A · Excellent

#26

3-valley's Construction INC

License #489300 · B

95/100

Grade A · Excellent

#27

C W Construction INC

License #344027 · B

95/100

Grade A · Excellent

#28

Kaplan a Construction CO INC

License #490989 · B

95/100

Grade A · Excellent

#29

Bre Electric INC

License #493143 · C10

95/100

Grade A · Excellent

#30

A C a Heating & Air Conditioning

License #503032 · C20

95/100

Grade A · Excellent

#31

Executive Elevator INC

License #504771 · C11

95/100

Grade A · Excellent

#32

System 1 Interiors

License #514577 · C33

95/100

Grade A · Excellent

#33

California Concrete Cleaning INC

License #516922 · D38

95/100

Grade A · Excellent

#34

Cal - Lite Concrete

License #517895 · C-8

95/100

Grade A · Excellent

#35

Dalton Trucking INC

License #522899 · C12

95/100

Grade A · Excellent

#36

Bender Brett Wall Covering INC

License #574362 · C33

95/100

Grade A · Excellent

#37

Jed August

License #536787 · B

95/100

Grade A · Excellent

#38

Moore Electric INC

License #575048 · B

95/100

Grade A · Excellent

#39

Comfort Mechanical Enterprises INC

License #608875 · C-2

95/100

Grade A · Excellent

#40

Gutierrez Albert

License #578984 · C-8

95/100

Grade A · Excellent

#41

B J's Electrical +

License #951618 · C10

95/100

Grade A · Excellent

#42

Mehas Construction INC

License #585432 · A

95/100

Grade A · Excellent

#43

Fields Arnold Painting

License #592825 · C33

95/100

Grade A · Excellent

#44

Tobin Construction INC

License #593678 · A

95/100

Grade A · Excellent

#45

Allen-de Roofing/drywall Contractor

License #599041 · C-9

95/100

Grade A · Excellent

#46

Air Controlled Environments

License #623782 · C20

95/100

Grade A · Excellent

#47

Drop & Son's Construction INC

License #632307 · B

95/100

Grade A · Excellent

#48

Woods J Flooring INC

License #635572 · C15

95/100

Grade A · Excellent

#49

Uptown Interiors INC

License #639945 · B

95/100

Grade A · Excellent

#50

Rogers Remodeling

License #645111 · B

95/100

Grade A · Excellent

Finding the Best Contractors in Rancho Cucamonga

When hiring a contractor in Rancho Cucamonga, California, due diligence matters. The contractors listed above have been verified against multiple government databases and achieved Safety Scores of 85 or higher—placing them among the most compliant contractors in the area.

Our Safety Score considers:

  • License Status — Active CSLB license with proper classifications
  • Workers' Compensation — Current coverage to protect you from liability
  • Contractor Bond — Financial protection if work isn't completed
  • Federal Compliance — No debarments, wage violations, or safety citations

While a high Safety Score is a strong indicator of a reputable contractor, we always recommend getting multiple quotes, checking references, and verifying the contractor is licensed for your specific type of project.

Safety Scores are calculated based on publicly available government records and are updated weekly. For official verification, check directly with CSLB at cslb.ca.gov.