| Custom Deluxe Painting | Custom Deluxe Painting | — | (760) 473 7911 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Custom Development | Custom Development | — | (858) 405 9521 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Door Boutique | Custom Door Boutique | mike@customdoorboutique.com | (760) 419 4414 | Other | Vista · San Diego County | — | — |
| Custom Electric Sd | James Tabar Lynch | james@customelectricsd.com | (619) 301 5255 | Electricians | San Diego · San Diego County | — | — |
| Custom Environment | Custom Environment | — | (619) 318 1318 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Finishes INC DBA Five Star Custom Painting | Terry Jack Vaughn | — | (760) 271 3900 | Windows, patio, painters | Carlsbad · San Diego County | — | — |
| Custom Flooring Expert INC | Luis Enrique Rodriguez | — | (760) 535 1154 | Other | Escondido · San Diego County | — | — |
| Custom Floors Flooring Professionals | Custom Floors Flooring Professionals | — | (760) 315 2891 | Other | Ramona · San Diego County | — | — |
| Custom Gate | Custom Gate | gail@customgate.com | (760) 214 7147 | Other | Fallbrook · San Diego County | — | — |
| Custom Glass And Mirror DBA North County Window And Door | North County Window And Door | — | (760) 728 3110 | Windows, patio, painters | Bonsall · San Diego County | — | — |
| Custom Glass Specialties INC | Leticia Arias | — | (619) 474 4613 | Windows, patio, painters | National City · San Diego County | — | — |
| Custom Home Audio Video Integration LLC | David Richard Macleod | — | (858) 436 7122 | Other | Solana Beach · San Diego County | — | — |
| Custom Home Renovations | Eliseo Rios | — | (619) 621 0257 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Custom Home Technology INC | John Michael Jr Dogoldogol | — | (858) 467 9929 | Other | La Mesa · San Diego County | — | — |
| Custom Improvement Contracting | Edgar Edward Iii Cicone | — | (760) 613 9405 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Custom Installations Cabinet And Millwork | Randy Carl Stump | — | (619) 812 3020 | Other | El Cajon · San Diego County | — | — |
| Custom Interiors By Yigael INC | Yigael Israel Spiro | — | (760) 635 0369 | Other | Encinitas · San Diego County | — | — |
| Custom Landscaping & Irrigation INC DBA Custom Pools | Richard Alan Boinus | — | (619) 300 2443 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Custom Lights And Iron | Custom Lights And Iron | — | (858) 699 8805 | Other | San Diego · San Diego County | — | — |
| Custom Made Remodeling | Zachariah Aaron Costigan | guy@infinitydesignbuild.com | (707) 382 5530 | GC, remodel, ADU | Santee · San Diego County | — | — |
| Custom Masonry & Fireplace Design INC | Paul Anthony Walker | sandiegofireplaces@gmail.com | (619) 884 6492 | Other | El Cajon · San Diego County | — | — |
| Custom Mechanical INC | Frank Orlando Jr Aviles | — | (760) 744 9709 | HVAC | Escondido · San Diego County | — | — |
| Custom Plumbing Innovations LLC | Matthew Charles Gast | — | (619) 937 1564 | Other | El Cajon · San Diego County | — | — |
| Custom Remodeling | Custom Remodeling | — | (619) 847 3025 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Roof Services | Ivan Mayu Acevedo | info@christianroofing.com | (760) 215 6765 | Other roofers | Vista · San Diego County | — | — |
| Custom Slab Works INC | Martinez Heriberto | cswcounters@gmail.com | (619) 772 3005 | Other | San Marcos · San Diego County | — | — |
| Custom Stucco | Custom Stucco | — | (760) 809 6527 | Other | Vista · San Diego County | — | — |
| Custom Touch Electric | Jason Michael Ewig | — | (760) 728 7000 | Electricians | Fallbrook · San Diego County | — | — |
| Custom Wood Carvings | Custom Wood Carvings | — | (760) 805 3410 | Other | Vista · San Diego County | — | — |
| Custom Wood Works & Installation | Manuel Alonso Guerrero-Medina | — | (619) 638 4270 | Other | National City · San Diego County | — | — |
| Customaxx Construction | Russell Scott Fuchigami | — | (760) 224 4426 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Custombuildersandexteriors INC | Kevin Donald Hubbard | kevin@custombuildersandexteriors.com | (760) 975 7120 | GC, remodel, ADU | Valley Center · San Diego County | — | — |
| Customcrete Concrete INC | Galindo Edward | — | (619) 210 3243 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Customdesign Const | Jared Thomas Ray | — | (768) 218 3300 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Cut 'n Core | Cristian Danery Lima | clima@cutncore.com | (858) 560 6627 | Other | San Diego · San Diego County | — | — |
| Cut - In - Edge Painting | David Timothy Parsons | — | (619) 579 9904 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Cutbuilt Construction | Dirk Alexander Cahaan | contact@cutbuilt.com | (760) 290 1115 | GC, remodel, ADU | Spring Valley · San Diego County | — | — |
| Cutting Edge Flooring | Cutting Edge Flooring | admin@cuttingedgeflooring.com | (780) 999-7966 | Other | Chula Vista · San Diego County | — | — |
| Cutting Edge Restoration INC | Julio Cesar Arias | — | (760) 535 4360 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cutting Edge Wood Floors INC | Donald Richard Crawford | — | (760) 432 8299 | Other | Escondido · San Diego County | — | — |