| Raine General Engineering INC | Yessenia Galindo Eugenio | — | (760) 791 7568 | Other | El Centro · Imperial County | — | — |
| Red One Electric INC | Carlos W Rojo Lopez | — | (760) 604 7295 | Electricians | El Centro · Imperial County | — | — |
| Reyes Construction | Jose Gilvalant Reyes | — | (760) 970 6260 | Electricians | El Centro · Imperial County | — | — |
| Ricky Wolvin | Ricky Wolvin | — | (619) 846 2848 | GC, remodel, ADU | Winterhaven · Imperial County | — | — |
| Rl Peeks Pump Sales L L C | Ronald Lee Peeks | — | (760) 996 5388 | Other | Holtville · Imperial County | — | — |
| Rn Power Electric Service | Ricardo Rodriguez Negrete | — | (760) 554 6713 | Electricians | Calexico · Imperial County | — | — |
| Robbie's Floor Coverings | Robbie's Floor Coverings | robbie@robbiesfloorcoverings.com | (760) 353 1601 | Other | El Centro · Imperial County | — | — |
| Robles Underground | Manuel Martin Robles | — | (760) 643 3691 | Other | Seeley · Imperial County | — | — |
| Roc Construction INC | Robert David Osoria | — | (760) 355 8993 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Rod Conley Maintenance | Rod Conley Maintenance | — | (760) 427 0080 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Romeza Construction | Romero Meza Gildardo | — | (619) 207 5066 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Rove Engineering INC | Steven Eric Eugenio | — | (760) 425 0001 | Other | El Centro · Imperial County | — | — |
| Rubio's Construction | Rubio Anthony | — | (760) 554 2324 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Rubio's Construction Services INC | Anthony Rubio | info@rubiosconstructionservices.com | (760) 554 2324 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Rugax Construction INC | Manuel Alejandro Rubio Gaxiola | — | (760) 235 2035 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Ruiz Air Conditioning & Heating | Ruiz Air Conditioning & Heating | — | (760) 970 4866 | HVAC | El Centro · Imperial County | — | — |
| Russell Allen Roben | Russell Allen Roben | — | (760) 498 6305 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Russell Roben | Russell Roben | — | (760) 355 5600 | Electricians | Imperial · Imperial County | — | — |
| Rw Roofing | Romo Wells Bryan | — | (760) 693 3949 | Other roofers | Brawley · Imperial County | — | — |
| S B B Electric | Garcia Sergio | sbbelectric61@yahoo.com | (760) 554 7686 | Electricians | Calexico · Imperial County | — | — |
| S C Dvbe INC | Samuel Dean Mullen | — | (760) 550 1645 | Other roofers | Imperial · Imperial County | — | — |
| S L A Paving INC | Gina Marie Hoehl | gina@slapaving.com | (760) 701 9011 | Other | Imperial · Imperial County | — | — |
| Sabatasso Development INC | Frank David Jr Sabatasso | — | (310) 541 9489 | GC, remodel, ADU | Palos Verdes · Imperial County | — | — |
| Salgado Electric | Ruben Navarro Salgado | — | (760) 455 2933 | Electricians | El Centro · Imperial County | — | — |
| Salvador Demara | Salvador Demara | — | (760) 886 3148 | Other | Calexico · Imperial County | — | — |
| Sanco Builders INC | James Allen Jr Sanders | — | (760) 353 5440 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Sauceda Construction | Fernando Garcia Sauceda | — | (760) 550 3786 | GC, remodel, ADU | Brawley · Imperial County | — | — |
| Sd Unique Pools LLC | Sd Unique Pools LLC | — | (760) 715-1769 | Pool | El Cajon · Imperial County | — | — |
| Sergio Alfredo Delgado | Sergio Alfredo Delgado | — | (760) 556 3440 | Other | Calexico · Imperial County | — | — |
| Sergio Dominguez | Sergio Dominguez | — | (760) 460 2191 | GC, remodel, ADU | Brawley · Imperial County | — | — |
| Service Champions Plumbing Heating & AC | Service Champions Plumbing Heating & AC | — | (323) 284-1599 | HVAC | Los Angeles · Imperial County | — | — |
| Servpro Of El Centro / Salton City | Andy Alvarez | — | (760) 337 5858 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Seven T24 Roofing INC | Duarte Steven | admin@sevent24roofing.com | (760) 890 5640 | Other roofers | Calexico · Imperial County | — | — |
| Sierra Air And Electric | Stephen James Uhri | — | (760) 352 2767 | HVAC | Brawley · Imperial County | — | — |
| Sierra Mare Paving | Mario Andrea Giuss Maresca | — | (619) 972 4797 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Sign Factory | Mario Fernando Rodriguez | — | (760) 455 7589 | Electricians | El Centro · Imperial County | — | — |
| Simple Property Solutions | Simple Property Solutions | — | (760) 791 0062 | GC, remodel, ADU | Brawley · Imperial County | — | — |
| Sly Construction INC | Silvestre Garcia | — | (760) 540 0813 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| South Cal Builders & Developers INC | George Orlando Castano | — | (310) 753 2249 | HVAC | Palos Verdes · Imperial County | — | — |
| South Cali Air Conditioning INC | Jared Esteban Hernandez | — | (760) 556 9910 | HVAC | El Centro · Imperial County | — | — |