| H N Electric | Nunez Heriberto | — | (909) 854 4970 | Electricians | Fontana · San Bernardino County | — | — |
| H P Concrete | H P Concrete | — | (951) 858 3647 | Other | Rialto · San Bernardino County | — | — |
| H R Framing | H R Framing | — | (909) 553 9923 | Other | Lake Arrowhead · San Bernardino County | — | — |
| H S Brown Construction INC | Harold Shane Brown | — | (760) 267 3113 | GC, remodel, ADU | Barstow · San Bernardino County | — | — |
| H Septic | H Septic | — | (909) 223 7754 | Other | Ontario · San Bernardino County | — | — |
| H&b Refrigeration & Heating INC | James Robert Jr Eichler | — | (760) 256 5651 | HVAC | Barstow · San Bernardino County | — | — |
| H&d Water And Mold Remediation Services | Hector Manuel De La Mora | — | (951) 665 5224 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| H&r Gardening And Landscaping | H&r Gardening And Landscaping | — | (909) 754 3254 | Windows, patio, painters | San Bernardino · San Bernardino County | — | — |
| H2m Construction INC | Sherif Moussa Gabersr Gerges | — | (626) 343 8866 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| H2m Power Construction INC | Shenouda Arag Mokhtar Henes | — | (714) 369 7002 | Electricians | Fontana · San Bernardino County | — | — |
| H2o Plumbing | H2o Plumbing | — | (909) 772 2278 | Other | Redlands · San Bernardino County | — | — |
| H2o Pool & Spa INC | Gonzalez Heder Ortiz | poolspaservice2@gmail.com | (909) 401 0302 | Pool | Rancho Cucamonga · San Bernardino County | — | — |
| H2o Pro | H2o Pro | — | (909) 591 7323 | Pool | Chino Hills · San Bernardino County | — | — |
| H2si Construction | Brian Kelly Baughman | — | (909) 597 1892 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| H5 Construction INC | Tania Torres Arlanzon | contact.us@h5construction.com | (626) 536 0421 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Haagsma Masonry | Haagsma Masonry | — | (760) 363 0029 | Other | Morongo Valley · San Bernardino County | — | — |
| Haas Plumbing | Haas Plumbing | — | (626) 329 3648 | Other | Big Bear City · San Bernardino County | — | — |
| Hacienda Heating & A/c | Hacienda Heating & A/c | — | (760) 460 7079 | HVAC | Apple Valley · San Bernardino County | — | — |
| Hacienda Properties Development INC | Luis Lon Herrera | — | (760) 221 6083 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Hacienda Rb Construction INC | Earl Lance Allen | — | (760) 987 5408 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Hadyeh Construction INC | Hadyeh Mohammad Khwankhamis | — | (909) 637 6039 | Electricians | Fontana · San Bernardino County | — | — |
| Hafner Company INC | John Albert Hafner | — | (909) 917 5485 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Hagen Heating & Air | Hagen Heating & Air | — | (951) 318 1186 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Hahnus INC | Sun Wha Kim | — | (213) 716 0005 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Hailo Flooring INC | Kevin James Enriquez | — | (909) 646 3444 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Haines Contracting & Remodeling | Jerry William Haines | — | (909) 527 9859 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Hale Electric | Eric Ryann Hale | — | (760) 713 3983 | Electricians | Landers · San Bernardino County | — | — |
| Hale General Construction INC | Jeremiah Jonathan Hale | — | (909) 549 8721 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Hall & Helsius Construction INC | Matthew Robert Helsius | — | (760) 490 0724 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Halltile And Stone | Douglas Lawrence Brown | — | (760) 265 5918 | Other | Victorville · San Bernardino County | — | — |
| Halo Hammer Construction | Gallegos Angel | — | (909) 347 0074 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Ham's Electric INC | Kristi Lynn Mc Sherry | — | (909) 982 7344 | Electricians | Upland · San Bernardino County | — | — |
| Hamer Plumbing | Hamer Plumbing | — | (909) 744 0233 | Other | Big Bear Lake · San Bernardino County | — | — |
| Hamilton Ceiling Systems INC | Steven Doyle Hamilton | — | (951) 276 1843 | Other | San Bernardino · San Bernardino County | — | — |
| Hamilton Family Development | Rob Hamilton Caldwell | — | (760) 898 2997 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Hamilton Homes Real Estate | Michael Malcolm Phillips | — | (626) 786 3841 | GC, remodel, ADU | Running Springs · San Bernardino County | — | — |
| Hammer Concrete Bros INC | Luis Alonso Leon Gonzalez | — | (760) 983 1167 | Other | Phelan · San Bernardino County | — | — |
| Hammer Head Construction | Oscar John Gonzalez | — | (951) 251 4606 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Hammer Heating & Air | Cole Jeffrey Hammer | hammerheatingair@gmail.com | (626) 201 1443 | HVAC | Upland · San Bernardino County | — | — |
| Hampton Tedder Electric Commercial | Christine Marie Tedder | — | (909) 993 5998 | Electricians | Montclair · San Bernardino County | — | — |