| Hardpro Engineering | Nicolas Dorado Macias | — | (951) 396 1313 | Other | Riverside · Riverside County | — | — |
| Hardwired Electric INC | Warren Anthony Enochs | — | (951) 757 0526 | Electricians | Menifee · Riverside County | — | — |
| Harim & Pete's Painting | Peter Delgado Sanchez | — | (909) 376 9269 | Windows, patio, painters | Corona · Riverside County | — | — |
| Harlow Electric INC | Shane Ryan Harlow | — | (951) 567 1162 | Electricians | Hemet · Riverside County | — | — |
| Harmon Excavating | Harmon Excavating | — | (909) 721 7350 | Other | Murrieta · Riverside County | — | — |
| Haro Heating And Air Conditioning | Haro Heating And Air Conditioning | — | (951) 526 7861 | HVAC | Temecula · Riverside County | — | — |
| Haro Landscape Construction INC | Dario Rafael Haro-trujillo | — | (951) 570 9549 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Haro's Cabinets INC | Adalberto Haro | haros@ymail.com | (951) 688 4276 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Haro's Painting INC | Aguilar Noe Haro | — | (909) 418 1165 | Windows, patio, painters | Mira Loma · Riverside County | — | — |
| Harold A Hoy | Harold A Hoy | — | (951) 760 5584 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Harold And Wright | Harold And Wright | — | (951) 365 0753 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Harold K Smith Excavating Contractor | Harold Keith Jr Smith | — | (951) 659 2996 | Other | Idyllwild · Riverside County | — | — |
| Harold White Tile Work | Harold White Tile Work | — | (951) 772 0322 | Other | Moreno Valley · Riverside County | — | — |
| Harper Electrical Contractors INC | Bartley Eugene Harper | — | (951) 520 0434 | Electricians | Norco · Riverside County | — | — |
| Harrell Electric | James Russell Harrell | — | (951) 275 3468 | Electricians | Riverside · Riverside County | — | — |
| Harris Braunfeld DBA Braunfeld Electric | Braunfeld Harris | — | (323) 665 6691 | Electricians | Wildomar · Riverside County | — | — |
| Harris Interiors | Harris Interiors | — | (951) 723 8707 | Other | Menifee · Riverside County | — | — |
| Harris Plumbing | Harris Plumbing | — | (619) 339 2920 | Other | Temecula · Riverside County | — | — |
| Harrison Construction Builders | Persky Robert | — | (714) 403 1624 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Harrison's Contracting/consulting Associates | Warren Michael Harrison | — | (661) 224 2067 | Windows, patio, painters | Sun City · Riverside County | — | — |
| Harry Grisham | Harry Grisham | — | (951) 316 0415 | Electricians | Riverside · Riverside County | — | — |
| Hart Construction | Michael Ernest Hart | — | (760) 333 1517 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Hart Roofing | Hart Andrew Ronstadt | — | (951) 256 6355 | Other roofers | Corona · Riverside County | — | — |
| Hart's Cabinets And Installation | Michael Weldon Hart | — | (714) 393 2009 | Other | Norco · Riverside County | — | — |
| Hartig Construction | Benjamin Alexander Hartig | — | (951) 543 6347 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Hartman Construction & Remodeling | Chancey Elizabeth Hartman | — | (760) 362 4433 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Hartman Security Corp | Cory Allen Hartman | — | (951) 326 7803 | Electricians | Wildomar · Riverside County | — | — |
| Harvey's Garage Door | Eric Richard Henderson | — | (760) 346 9685 | Other | Palm Desert · Riverside County | — | — |
| Hasco Heating Airconditioning Service Company INC | Daryl Lawrence Salmon | — | (951) 682 3336 | HVAC | Riverside · Riverside County | — | — |
| Hatch Drywall Company | Stephen Dale Hatch | — | (951) 736 9846 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Hauger Plumbing INC | Steven Edward Hauger | — | (951) 370 4669 | Other | Canyon Lake · Riverside County | — | — |
| Haven Electric | Chad William Bonnett | — | (951) 776 6586 | Electricians | Riverside · Riverside County | — | — |
| Haven Home Remodeling Corp | James Ray Stinnett | — | (760) 525 8512 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Haviland Electric INC | Robert Frances Haviland | — | (951) 659 5732 | Electricians | Idyllwild · Riverside County | — | — |
| Havn Collective INC | Andrew Joseph Axtell | — | (714) 900 0225 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Hawk Iron Works INC | Terrones Joel | — | (951) 265 4785 | Other | Wildomar · Riverside County | — | — |
| Hawk M S C | Hawk M S C | — | (760) 521 9085 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Hawx Pest Control | Hawx Pest Control | — | (855) 739-0061 | Pest, tile roofs | Riverside · Riverside County | — | — |
| Haxton Masonry INC | Steve Michael Haxton | — | (928) 344 6174 | Other | Temecula · Riverside County | — | — |
| Hayes Construction Services | Patrick Hill Hayes | — | (951) 551 8722 | GC, remodel, ADU | Anza · Riverside County | — | — |