| Innovative Master Plumbing & Contracting INC | Llamas Adalid | — | (951) 347 6297 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Innovative Outdoor Lighting And Audio | Sabrina Maureen Rindels | — | (760) 880 2722 | Other | Palm Desert · Riverside County | — | — |
| Innovative Pavers INC | Rendon Edward | — | (951) 634 3291 | Windows, patio, painters | Winchester · Riverside County | — | — |
| Innovative Pool Management | Innovative Pool Management | — | (760) 760 7211 | Pool | La Quinta · Riverside County | — | — |
| Innovative Signs | Innovative Signs | — | (909) 641 3677 | Other | Hemet · Riverside County | — | — |
| Innovative Tree Company | Ernesto Alonso Ramirez | — | (951) 490 2130 | Tree | Hemet · Riverside County | — | — |
| Innovators Stoneworks INC | Juan Antonio Azpeitia | — | (714) 863 9797 | Other | Riverside · Riverside County | — | — |
| Inside Technologies | Inside Technologies | — | (951) 377 3473 | Other | Riverside · Riverside County | — | — |
| Inspired Innoventions | Phillip Lee Schroeder | — | (760) 610 2490 | Other | Palm Desert · Riverside County | — | — |
| Inspired Tile | Inspired Tile | — | (951) 220 3930 | Other | Perris · Riverside County | — | — |
| Instant Flooring LLC | Hector Santiago De La Torre | — | (714) 653 3448 | Other | Corona · Riverside County | — | — |
| Insul-light Insulation Company INC | Glenn Mitchell Light | — | (951) 830 3626 | Other | Perris · Riverside County | — | — |
| Insulation Commandos Of Temecula Valley & North San Diego | Louis Todd Morelli | — | (714) 931 6459 | Other | Murrieta · Riverside County | — | — |
| Integral Design Construction INC | David Lane Bradish | — | (714) 920 8358 | GC, remodel, ADU | Idyllwild · Riverside County | — | — |
| Integrated Air Solutions HVAC | Integrated Air Solutions HVAC | — | (714) 833 6607 | HVAC | Lake Elsinore · Riverside County | — | — |
| Integrated Construction Group | James Michael Coats | — | (951) 906 1076 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Integrated Home Solutions | Corey Fredric Kensley | — | (760) 250 1511 | Other | Indio · Riverside County | — | — |
| Integrated Paver Systems | Integrated Paver Systems | — | (951) 833 7563 | Other | Corona · Riverside County | — | — |
| Integrated Power & Lighting INC | Jeffrey John Bernardino | — | (951) 270 0575 | Electricians | Corona · Riverside County | — | — |
| Integrative Interiors | Integrative Interiors | — | (951) 543 7267 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Integrity Airflow Solutions | Integrity Airflow Solutions | — | (951) 403 1560 | HVAC | Lake Elsinore · Riverside County | — | — |
| Integrity Arborist And Ecoscape INC | Andre Isaiah Prado | — | (951) 406 1062 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Integrity Cabling Systems INC | Eric Michael Carter | — | (951) 245 5144 | Electricians | Canyon Lake · Riverside County | — | — |
| Integrity Chem-dry | Integrity Chem-dry | — | (951) 247 8844 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Integrity Constructors INC | John Frank Jr Parslow | — | (310) 863 0716 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Integrity Contracting Group INC | Kirk Tuffy Vonglahn | integritycontractinggroup@yahoo.com | (714) 325 7855 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Integrity Contractors INC DBA Integrity Concrete | Ramirez Heriberto Lopez | — | (951) 741 9168 | Other | Menifee · Riverside County | — | — |
| Integrity Custom Pools | Integrity Custom Pools | — | (949) 573 1314 | Pool | Corona · Riverside County | — | — |
| Integrity Doors | Integrity Doors | — | (951) 238 5191 | Other | Hemet · Riverside County | — | — |
| Integrity Electric | Bradley Paul Schreter | interested@domainmarket.com | (951) 204 8143 | Electricians | Eastvale · Riverside County | — | — |
| Integrity Electric | Nathan David Montgomery | interested@domainmarket.com | (906) 367 4700 | Electricians | Jurupa Valley · Riverside County | — | — |
| Integrity Fire Protection | Victor J Amaya-Ortiz | — | (714) 400 4604 | Other | Jurupa Valley · Riverside County | — | — |
| Integrity General Engineering Contractors INC | James Anthony Vedova | — | (951) 735 2117 | Other | Corona · Riverside County | — | — |
| Integrity Heating And Air Solutions | Stephen Eiji Robinson | — | (951) 561 0005 | HVAC | Temecula · Riverside County | — | — |
| Integrity HVAC And Plumbing INC DBA Integrity HVAC | Ramon Jr Rodriguez | — | (760) 668 6640 | HVAC | Desert Hot Springs · Riverside County | — | — |
| Integrity Industrial Coatings INC | John Raymond Jr Nichols | — | (951) 837 5869 | Windows, patio, painters | Hemet · Riverside County | — | — |
| Integrity Landscape Construction | Michael Anthony Zamora | — | (951) 443 6067 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Integrity Leveling INC | Christopher Lemont Richardson | info@integrityleveling.com | (909) 851 5293 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Integrity Patio Covers | Integrity Patio Covers | — | (714) 948 0610 | Other | Winchester · Riverside County | — | — |
| Integrity Plumbing | Integrity Plumbing | — | (909) 260 8915 | Other | Moreno Valley · Riverside County | — | — |