| G M Woodworks | G M Woodworks | — | (951) 423 6460 | Other | Murrieta · Riverside County | — | — |
| G N Landscaping INC | Eric Nicanor | — | (951) 722 0138 | Windows, patio, painters | Perris · Riverside County | — | — |
| G O A T Construction | William Lee Golyer | — | (951) 663 6547 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| G O Langlois Construction INC | Gerry Owen Langlois | — | (760) 772 2333 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| G O P Construction | George O Paredes | — | (714) 393 2494 | GC, remodel, ADU | Corona · Riverside County | — | — |
| G Power INC | Isaac Jorge Gamez | — | (760) 409 7425 | Electricians | Palm Springs · Riverside County | — | — |
| G R C Contracting | Gilberto Castro Ramirez | — | (714) 719 8050 | GC, remodel, ADU | Corona · Riverside County | — | — |
| G R Electric | Greg John Richardson | — | (951) 674 4208 | Electricians | Lake Elsinore · Riverside County | — | — |
| G R Plumbing | G R Plumbing | — | (760) 501 9409 | Other | Indio · Riverside County | — | — |
| G R S Construction Services Co | Gene Raymond Selaya | — | (951) 403 5200 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| G R Salquist INC | Gary Raymond Salquist | — | (714) 679 7176 | Other | Perris · Riverside County | — | — |
| G R W Construction | Gregory Roy Wright | — | (714) 914 2027 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| G R W General Engineering Incorporated | Gene Richard Wark | — | (951) 491 1190 | Other | Temecula · Riverside County | — | — |
| G S Bullen | G S Bullen | — | (760) 770 0733 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| G S I | Gary Steven Ingram | — | (951) 541 0788 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| G S Pool Service | Gerber A Segovia | — | (760) 327 3992 | Pool | Cathedral City · Riverside County | — | — |
| G Shield Electric | Gonzalez George | gshieldelectric@gmail.com | (626) 510 3416 | Electricians | Menifee · Riverside County | — | — |
| G Synthetic Products | Joanna Jacqueline Gomez | — | (951) 742 2606 | Other | Perris · Riverside County | — | — |
| G T Burch Construction | Gary Thomas Burch | — | (909) 489 8820 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| G T Tile | G T Tile | — | (760) 250 6990 | Other | Palm Desert · Riverside County | — | — |
| G T Z Tree Service | Gonzalez Benjamin Gutierrez | — | (951) 809 7751 | Tree | Norco · Riverside County | — | — |
| G V Construction Services | Guy Howard Varcados | info@gvconstructionservices.com | (951) 545 0031 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| G V General Builder | G V General Builder | — | (442) 400 1129 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| G W A Electric | Gerard William Amento | — | (951) 282 0336 | Electricians | Cherry Valley · Riverside County | — | — |
| G W C Construction | Guillermo Walter Caipo | — | (866) 663 8126 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| G Z Electric INC | Oscar Ivan Gonzalez Vazquez | — | (951) 349 5769 | Electricians | Perris · Riverside County | — | — |
| G&a Innovation Construction | Alejandro Robles | — | (909) 368 4930 | Electricians | Riverside · Riverside County | — | — |
| G&e Pool Construction | Ramirez Enedelia Gonzalez | — | (760) 427 0131 | Windows, patio, painters | Coachella · Riverside County | — | — |
| G&r Unique Pavers Design INC | Gabriel Gonzalez | — | (760) 575 8240 | Other | Coachella · Riverside County | — | — |
| G&v Drywall INC | Luis Alberto Galvan Salazar | — | (951) 376 9021 | Other | Riverside · Riverside County | — | — |
| G-shock Electrical & Controls | Giuseppe Salvatore Grammatico | — | (951) 691 9052 | Electricians | Wildomar · Riverside County | — | — |
| G.l. Electric | Lamendola Giuseppe Saverio | — | (347) 236 7227 | Electricians | Riverside · Riverside County | — | — |
| G.s Stucco Fix | Ramon Isauro Sandoval Chavez | — | (760) 289 8278 | Other | Coachella · Riverside County | — | — |
| G1 Electric LLC | Daniel Alvarado Gutierrez | — | (909) 903 1617 | Electricians | Riverside · Riverside County | — | — |
| G2g Construction INC | Charles Thomas Dossett | — | (816) 914 1350 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| G3 Telecom | Edgar Armando Torres | — | (951) 227 8724 | Other | Norco · Riverside County | — | — |
| G5 Cabinets LLC | Juan Jose Garcia Aguirre | — | (951) 910 2060 | Other | Wildomar · Riverside County | — | — |
| G5 Concrete Restoration | G5 Concrete Restoration | — | (951) 531 3115 | Restoration | Corona · Riverside County | — | — |
| G6 Designs Pools | G6 Designs Pools | — | (626) 705 5770 | Pool | Eastvale · Riverside County | — | — |
| Gabe & Sons Construction And Maintenance Services | Baleanu Gabriel | — | (909) 232 5357 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |