| Garza's Painting Co | Justin Louis Garza | — | (760) 887 1114 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Gates Concrete | Gates Concrete | — | (909) 261 8607 | Other | San Bernardino · San Bernardino County | — | — |
| Gatorwraps INC | Rodney Francis Voegele | — | (702) 403 3200 | Other | Ontario · San Bernardino County | — | — |
| Gavin's Quality Construction INC | Gavino Quiroz Cervantes | — | (626) 736 0124 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| Gavinet Construction INC | Serge Charles Gavinet | — | (626) 422 0828 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Gavino Tree Service INC | Angel Ignacio Chavez-Escalante | — | (909) 246 4612 | Tree | Redlands · San Bernardino County | — | — |
| Gax Roofing | Arthur Alexander Gaxiola | sales@gaxroofing.com | (909) 819-8394 | Other roofers | Rancho Cucamonga · San Bernardino County | — | — |
| Gazvini Tile | Gazvini Tile | — | (760) 490 7230 | Other | Apple Valley · San Bernardino County | — | — |
| Gb Metal Fabricators INC | Ramon Ezequiel Ayala | — | (909) 770 3568 | Other | Montclair · San Bernardino County | — | — |
| Gbc Construction | Brian James Kensinger | contactus@gbcconstruction.com | (909) 717 4818 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Gc Construction & Fire Protection INC | Pang Chiu Chen | — | (909) 472 2919 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Gccs INC | Gilbert Raymond Castillo | — | (760) 963 5000 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Gci Electric | Gregoire Christopher Iesberts | — | (909) 864 1188 | Electricians | Highland · San Bernardino County | — | — |
| Gcl Real Estate LLC DBA Mobile Home Investers | Victor Alan Chen | — | (909) 816 3161 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Gco General Contractors | Sergio Humberto Rodriguez Guerrero | gcocontractors30@gmail.com | (909) 452 1432 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Gd&g Garage Doors & Gates INC | Cesar Osbaldo Diaz Godina | — | (909) 233 2825 | Other | Ontario · San Bernardino County | — | — |
| Gdl Painting Services INC | Solis Alfredo Quinonez | — | (909) 945 7792 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| Ge Electric | Uriah Golden Eagle Calloway | — | (760) 422 7890 | Electricians | Morongo Valley · San Bernardino County | — | — |
| Geissler Construction | George Scott Geissler | — | (909) 337 9607 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| Gelectric | Guirguis Samwel | — | (626) 926 8046 | Electricians | Chino · San Bernardino County | — | — |
| Gemini Woodworks INC | Nathanial Jon Steigenga | — | (206) 380 4201 | Other | Yucca Valley · San Bernardino County | — | — |
| Gen Con Enviro Serv Group | Gerald Alan Yates | — | (626) 255 8755 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Gen Mechanical INC | Octavio Guatemala | generalmechanical@yahoo.com | (909) 200 0222 | HVAC | Fontana · San Bernardino County | — | — |
| Gene Barner Painting | Gene Barner Painting | — | (760) 660 9375 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| Gene Michael Ciampa Plumbing | Gene Michael Ciampa Plumbing | — | (760) 408 9955 | Other | Yucca Valley · San Bernardino County | — | — |
| General Contracting Structural Services & Repair | Francesco Michelino Sunseri | — | (909) 350 4703 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| General Outdoor Advertising | William Raymond Jr Wynn | — | (909) 983 4414 | Other | Ontario · San Bernardino County | — | — |
| Generation Painting | Generation Painting | — | (760) 684 2280 | Windows, patio, painters | Hesperia · San Bernardino County | — | — |
| Generator Services Co INC | Robert Dean Butler | — | (800) 691 1601 | Alarm and generators | Rancho Cucamonga · San Bernardino County | — | — |
| Genesis Construction And Remodeling INC | David Roy Robbins | — | (909) 725 3035 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Genesis Construction LLC | Adam Thomas Villalobos | — | (626) 315 2847 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Genesis Electric Incorporated | Samuel Romero | — | (909) 897 4637 | Electricians | San Bernardino · San Bernardino County | — | — |
| Genesis Glass Installations INC | Jose C Virrueta Medina | — | (909) 386 0520 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| Genesis Tree Care | Genesis Marlen Garcia Gomez | — | (760) 488 7446 | Other | Apple Valley · San Bernardino County | — | — |
| Genesis Vegetation Management INC | Rhonda Elaine Ramirez | — | (909) 712 2487 | Tree | Redlands · San Bernardino County | — | — |
| Genesis Wrecking INC | Daniel Michael Padilla | info@genesiswrecking.com | (909) 469 2600 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Gennaro Plumbing INC | Gennaro Francesco | — | (909) 875 7180 | Other | Bloomington · San Bernardino County | — | — |
| Gentech Comfort Solutions INC | Joseph Anthony Iii Prieur | — | (951) 796 4686 | HVAC | Oak Hills · San Bernardino County | — | — |
| Gentry General Engineering INC | Brenton Wayne Gentry | — | (909) 330 1128 | Other | Colton · San Bernardino County | — | — |
| Geo - Cal INC | Henry Olivier | — | (909) 880 1146 | Other | San Bernardino · San Bernardino County | — | — |