| HVAC Consulting Pro | HVAC Consulting Pro | — | (510) 377 0062 | HVAC | Lincoln · Placer County | — | — |
| Hydros Engineering INC | Gerry Otto La Budde | glabudde@hydros-engineering.com | (530) 637 4441 | Other | Weimar · Placer County | — | — |
| I M P Of Sacramento | I M P Of Sacramento | — | (916) 786 7665 | GC, remodel, ADU | Roseville · Placer County | — | — |
| I P A Construction | Joshua Isaiah Alva | — | (916) 258 2238 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Iak Construction INC | Aleksandr V Shylo | — | (916) 538 8348 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Ib Energy INC | Arthur Bukaty | — | (916) 718 9046 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Ic Construction INC | Anthony James Staiti | — | (916) 769 4040 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Ici INC | Frank Anthony Finochio | — | (916) 997 4444 | HVAC | Roseville · Placer County | — | — |
| Icon Electric INC | Kevin Patrick Burke | — | (530) 320 5320 | Electricians | Auburn · Placer County | — | — |
| Icu Technologies INC | Matthew James Rieder | — | (530) 488 7200 | Other | Roseville · Placer County | — | — |
| Ideal Carpentry | Ideal Carpentry | — | (707) 974 6506 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Ideal Flooring | Ideal Flooring | — | (916) 719 3354 | Other | Rocklin · Placer County | — | — |
| Ideal Home Solutions | Ideal Home Solutions | astigma@astigmatic.com | (916) 343 6961 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Idr Plumbing And Sewer Service | Isaac David Rodriguez | — | (530) 460 9006 | Other | Auburn · Placer County | — | — |
| Igor Tsyura | Igor Tsyura | — | (916) 710 1353 | Windows, patio, painters | Colfax · Placer County | — | — |
| Iknow Electric LLC | Erik Steven Skolnik | erik@iknowelectric.com | (916) 755 2264 | Electricians | Rocklin · Placer County | — | — |
| Ilmira Vagapova | Ilmira Vagapova | — | (916) 295 2434 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Imc Builders | Mendoza Isaac | — | (530) 301 0059 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Immunity Floors LLC | Zack Stein | — | (530) 852 2560 | Other | Colfax · Placer County | — | — |
| Impact Installations INC | Joseph L Cassar | — | (530) 268 0440 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Imperial Construction & Engineering INC | Anatolie Constantin Seremet | — | (916) 397 6711 | Other | Roseville · Placer County | — | — |
| Imperial Tile LLC | Jaxon Lee Smith | — | (541) 659 5759 | Other | Rocklin · Placer County | — | — |
| Imperium Services | Donald Fred Jr Dupont | — | (279) 272 7614 | Electricians | Loomis · Placer County | — | — |
| Impressive Exteriors INC DBA Impressive Exteriors Windows | David Daniel Trosper | — | (916) 437 7579 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Imr Construction | Michael Thomas Bacon | — | (775) 771 2943 | GC, remodel, ADU | Tahoe Vista · Placer County | — | — |
| Independent Commercial INC | Thomas Kent Jr Capel | — | (916) 439 2198 | Other | Roseville · Placer County | — | — |
| Independent Plumbing & Drain | Independent Plumbing & Drain | — | (916) 677 9225 | Other | Lincoln · Placer County | — | — |
| Independent Pools | Independent Pools | — | (916) 276 8478 | Pool | Roseville · Placer County | — | — |
| Indo Construction INC | Mikel Vincent Neves | indo.vikas@gmail.com | (530) 701 0011 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Indoor Air Diagnostics INC | Deborah Denise Donnici | — | (408) 690 1024 | HVAC | Lincoln · Placer County | — | — |
| Industrial Equipment Builders INC | Kevin Dean Clemens | — | (916) 812 2225 | Other | Newcastle · Placer County | — | — |
| Infinite Communications | Infinite Communications | — | (408) 806 9945 | Other | Roseville · Placer County | — | — |
| Infinite Floor Source LLC | Ajdin Habota | — | (916) 890 9334 | Other | Roseville · Placer County | — | — |
| Infinity Floors | Dennis Scott Bergstrom | — | (916) 804 4157 | Other | Penryn · Placer County | — | — |
| Ingram Plumbing Solutions | Ingram Plumbing Solutions | — | (530) 441 8371 | Other | Lincoln · Placer County | — | — |
| Innovate Design & Build | Denis Gusev | innovatedesignbuild@gmail.com | (916) 399 3998 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Innovated Electrical Services (ies) INC | Elijah Billydee Hill | — | (530) 401 7419 | Electricians | Auburn · Placer County | — | — |
| Innovations Unlimited | Innovations Unlimited | — | (916) 765 7800 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Innovative Chemical Solutions INC | Patrick Michael Mc Mahon | — | (916) 802 5043 | Other | Roseville · Placer County | — | — |
| Innovative Fire Systems INC | David Richard Ryan | — | (916) 842 0593 | Other | Roseville · Placer County | — | — |