| Icon | Inayatullah Abdul Jalil Qazi | — | (818) 606 0499 | HVAC | Riverside · Riverside County | — | — |
| Icon Builders Co | Eduardo Salazar | — | (909) 272 1387 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Icon Drywall Contractor | Icon Drywall Contractor | — | (951) 906 9381 | Other | Riverside · Riverside County | — | — |
| Icon Landscape Group | Eddie Junior Rochin | — | (951) 300 8865 | Other | Perris · Riverside County | — | — |
| Icon Plumbing | Icon Plumbing | — | (714) 209 9378 | Other | Moreno Valley · Riverside County | — | — |
| Icon Pro Painting INC | Michael Charles Jr Cross | — | (951) 963 5119 | Windows, patio, painters | Beaumont · Riverside County | — | — |
| Icon Water | Icon Water | — | (951) 696 9905 | Other | Temecula · Riverside County | — | — |
| Iconic Aire Corporation | Gregory Robert Helberg | greg@iconicaire.com | (951) 227 3595 | HVAC | Norco · Riverside County | — | — |
| Ics Heating And Cooling INC | Brian Robert Yohe | — | (951) 658 2879 | HVAC | Menifee · Riverside County | — | — |
| Ideal Electric INC | Jimmy Orozco Vargas | — | (951) 813 5169 | Electricians | Perris · Riverside County | — | — |
| Ideal Floors | Ideal Floors | — | (951) 733 5579 | Other | Menifee · Riverside County | — | — |
| Ideal Sign Company | Ryan Michael Strehorn | — | (951) 760 8973 | Other | Temecula · Riverside County | — | — |
| Idyllwild Antonio & Pablo's Painting LLC | Pablo Alberto Orellana Barrera | — | (714) 801 2721 | Windows, patio, painters | Idyllwild · Riverside County | — | — |
| Idyllwild Electric | Michael Tim Gustin | — | (760) 851 5432 | Electricians | Idyllwild · Riverside County | — | — |
| Idyllwild Heating & Cooling INC | Steven Lynn Holldber | — | (951) 659 4328 | HVAC | Idyllwild · Riverside County | — | — |
| Ie Alarm Systems | Utana Lawray Del Valle | — | (951) 686 2029 | Electricians | Riverside · Riverside County | — | — |
| Ie Comfort INC | Todd Allen Fairburn | info@iecomfort.com | (951) 789 3238 | HVAC | Riverside · Riverside County | — | — |
| Ie Roofing INC | Francisco Javier Alvarez Llamas | — | (951) 796 8366 | Other roofers | Riverside · Riverside County | — | — |
| Iec Design And Build INC | James Edwin Stevens | — | (800) 721 3140 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Ieroofing24 7 LLC | Steven Cervantes | — | (951) 384 9419 | Other roofers | Perris · Riverside County | — | — |
| Igc General Construction LLC | Ibarra Erick | — | (951) 712 8881 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Igg Concrete Construction | Israel Gutierrez Gonzalez | — | (951) 442 9474 | Other | Cherry Valley · Riverside County | — | — |
| Iguana Heating And Air Conditioning | Jose Louis Contreras | — | (760) 534 4430 | HVAC | La Quinta · Riverside County | — | — |
| Ike's Plumbing Service | Franco Isaac | — | (951) 687 7653 | Other | Riverside · Riverside County | — | — |
| Ikkon Glassworks | Ikkon Glassworks | — | (714) 482 7984 | Windows, patio, painters | Corona · Riverside County | — | — |
| Ilie's Electric | Vasile Ilie | — | (909) 609 6480 | Electricians | Sun City · Riverside County | — | — |
| Illectric INC | Joseph Phillip Ramirez | — | (562) 243 2579 | Electricians | Menifee · Riverside County | — | — |
| Illig Construction Company | Brian Anthony Jaramillo | — | (951) 712 3410 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Illusion Painting | Illusion Painting | — | (760) 620 8525 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Imac Construction INC | Perez David | — | (951) 520 9755 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Image Builders | Image Builders | — | (951) 532 7955 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Image Pest Control | Image Pest Control | — | (951) 538-1604 | Pest, tile roofs | Riverside · Riverside County | — | — |
| Imagine Builder | Imagine Builder | — | (949) 228 1527 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Imagine Electrical Service | Lafe Allyn Sr Ball | — | (909) 208 9401 | Electricians | Temecula · Riverside County | — | — |
| Imc Professional Building Clean Up LLC | Medina Ema | — | (714) 613 2251 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Imf Construction | Anthony Ibarra | — | (909) 680 7657 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Imh Group INC | Zhang Tong | — | (909) 267 8844 | Other | Riverside · Riverside County | — | — |
| Immaculate Landscapes | Immaculate Landscapes | — | (760) 883 0555 | Windows, patio, painters | Thermal · Riverside County | — | — |
| Immaculate Masonry | Joseph Mehl | — | (760) 449 3890 | Other | Coachella · Riverside County | — | — |
| Impact Electric INC | Brandon Michael Villano | — | (951) 667 9079 | Electricians | Temecula · Riverside County | — | — |