| G & R Constructors INC | Casey Eugene Ricks | — | (951) 440 6119 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| G & R Custom Builders INC | Vincent Bravo Guerrero | arregrcb@gmail.com | (909) 289 9316 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| G & S Carpet Mills INC | Gholamreza Gorginfar | — | (909) 447 4695 | Other | Montclair · San Bernardino County | — | — |
| G & S Reasonable Plumbing / All Tech | Borelli Gabriel | — | (909) 917 9707 | Other | Ontario · San Bernardino County | — | — |
| G - Factor Flooring | G - Factor Flooring | — | (818) 434 8358 | Other | San Bernardino · San Bernardino County | — | — |
| G 4 Construction | Fawn Marie Chambers | info@g-construction.com | (909) 618 8081 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| G A Demolition INC | Gerardo Alejandro Avalos | — | (323) 497 2218 | Other | Fontana · San Bernardino County | — | — |
| G A Drywall INC | Solis Gildardo Ayala | — | (909) 408 8044 | Other | Ontario · San Bernardino County | — | — |
| G A Marble And Granite INC | Karla Patricia Rodriguez Zuniga | — | (909) 889 8980 | Other | San Bernardino · San Bernardino County | — | — |
| G And G Steel | G And G Steel | — | (909) 338 8705 | Other | Crestline · San Bernardino County | — | — |
| G B C Sandoval's | G B C Sandoval's | — | (760) 906 1353 | Other | Victorville · San Bernardino County | — | — |
| G B R Paving | Guillermo Resendiz | sales@gbrpaving.com | (909) 590 3777 | Other | Chino · San Bernardino County | — | — |
| G C Construction | Gabriel Kenndal Carlson | — | (909) 337 1524 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| G C Painting | G C Painting | — | (951) 285 1936 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| G C Raingutters | G C Raingutters | — | (909) 337 1524 | Other | Blue Jay · San Bernardino County | — | — |
| G Communications INC | Carlos Angel Rubio | thomas@g-communications.com | (909) 913 2314 | Other | San Bernardino · San Bernardino County | — | — |
| G D A Incorporated | Rene Michael Liabeuf | — | (909) 554 4123 | Other | Yucaipa · San Bernardino County | — | — |
| G D G Communication INC | Guillermo D Gonzales | — | (951) 907 9225 | Other | Fontana · San Bernardino County | — | — |
| G D L Construction Group INC | Carlos Limon Sanchez | — | (909) 833 5334 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| G Davidson's Electric INC DBA Davidson's Electric | Leslie Glen Davidson | — | (909) 793 2806 | Electricians | Yucaipa · San Bernardino County | — | — |
| G E Finley Pool Service | Gregg Edwin Finley | — | (909) 800 1322 | Pool | Upland · San Bernardino County | — | — |
| G E Jumonville Construction INC | Griffin Edward Jr Jumonville | — | (760) 952 2555 | GC, remodel, ADU | Helendale · San Bernardino County | — | — |
| G E S Sheet Metal INC | Michelle Marie Lee | — | (909) 598 3332 | Other | Fontana · San Bernardino County | — | — |
| G F R Enterprises INC | Felizardo Jr Robles | info@gfrenterprises.com | (909) 949 1400 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| G K Electric | George Edward Kinum | — | (951) 840 5835 | Electricians | Hesperia · San Bernardino County | — | — |
| G Land Construction | Jay Jau Book | — | (626) 758 7774 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| G Lopez Construction LLC | Lopez Gilbert | — | (909) 544 7336 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| G M A Construction | Morales-aguilar Guillermo | — | (714) 719 7100 | GC, remodel, ADU | Oak Hills · San Bernardino County | — | — |
| G M C Heating & Cooling INC | Marwan Alagha | — | (909) 331 5313 | HVAC | Upland · San Bernardino County | — | — |
| G M Coatings | G M Coatings | — | (760) 241 1711 | Windows, patio, painters | Helendale · San Bernardino County | — | — |
| G M Excavating INC | Nathan James Mesna | justin@gmexcavating.com | (909) 867 0077 | Tree | Running Springs · San Bernardino County | — | — |
| G M Quality Painting | G M Quality Painting | — | (714) 944 0731 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| G M Z Painting | G M Z Painting | — | (951) 238 4872 | Windows, patio, painters | Fontana · San Bernardino County | — | — |
| G P C & Sons | G P C & Sons | — | (626) 278 3494 | Other | Big Bear City · San Bernardino County | — | — |
| G P General Contractor INC | Perez Gilbert | — | (951) 907 1049 | GC, remodel, ADU | Bloomington · San Bernardino County | — | — |
| G P Interiors | G P Interiors | — | (818) 679 5113 | Other | Phelan · San Bernardino County | — | — |
| G P K Construction | Gregory James Parker | info@gpkconstruction.com | (909) 917 8079 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| G R B Construction | Gary Randell Bond | — | (760) 964 3392 | Electricians | Oak Hills · San Bernardino County | — | — |
| G R Construction | Francisco Arturo Garcia | — | (714) 709 9804 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| G R Construction | Garrett Russell Cahoon | — | (714) 600 3954 | GC, remodel, ADU | Chino · San Bernardino County | — | — |