| Cumorah Construction | Hernandez Jose | — | (619) 820 5478 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Cumpston Construction | James Keith Cumpston | — | (619) 857 6261 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| Cunniff Construction INC | Alan Andrew Cunniff | — | (619) 254 3330 | GC, remodel, ADU | Imperial Beach · San Diego County | — | — |
| Cunningham Construction | Lisa Marie Cunningham | info@cunninghamconstruction.com | (619) 339 1460 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Cupp Plumbing | Cupp Plumbing | — | (619) 589 0225 | Other | Pine Valley · San Diego County | — | — |
| Cuppett's Custom Painting | Cuppett's Custom Painting | — | (760) 458 7113 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Curaflo Services LLC | Steven Hiroyuki Mori | — | (480) 981 8495 | Other | San Diego · San Diego County | — | — |
| Curb Appeal Building Design And Construction INC | Timothy John Holcombe | — | (858) 756 2690 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Curb Appeal Landscape | Rojas Villanueva Diego | — | (760) 270 3216 | Windows, patio, painters | Escondido · San Diego County | — | — |
| Curcic Construction INC | Momcilo Curcic | — | (760) 716 0434 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Curley's Building Services | Charles Richard Curley | — | (760) 717 7089 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Currans Electric INC | Paul William Currans | astigma@astigmatic.com | (210) 913 8618 | Electricians | San Diego · San Diego County | — | — |
| Current Edge Electric LLC | Jonathan Ali Magana | — | (619) 804 1155 | Electricians | Chula Vista · San Diego County | — | — |
| Current Electric | Matt Paul Lebrun | info.currentelectric@gmail.comoffice | (760) 445 5386 | Electricians | San Diego · San Diego County | — | — |
| Current Electric & Lighting | Robert Matthew Casillas | conrad@ctebuilders.com | (619) 366 1467 | Electricians | La Mesa · San Diego County | — | — |
| Current Force Electric | Scott Dennis Horban | — | (951) 746 8501 | Electricians | Warner Springs · San Diego County | — | — |
| Curt's Land Patrol Landscaping Serv | Curt's Land Patrol Landscaping Serv | — | (619) 997 5557 | Windows, patio, painters | Santee · San Diego County | — | — |
| Curtis Allan Floorcovering INC DBA Discount Flooring 2U | Allan William Ziman | — | (619) 477 7000 | Other | National City · San Diego County | — | — |
| Curtis Calvert Painting | Curtis Calvert Painting | — | (760) 532 1750 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| Curtis Construction | Neil Curtis Gehrke | — | (760) 518 2969 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Curtis Drilling Co | Joshua Ryan Methling | estimating@curtisdrilling.com | (760) 727 7330 | Other | Escondido · San Diego County | — | — |
| Curtis Ryan Construction | Curtis Ryan Cox | guy@infinitydesignbuild.com | (760) 889 2751 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Curtis Shaw DBA S D S Bars & Restaurant Fixtures | Curtis Lyn Shaw | — | (619) 981 9246 | Other | Lakeside · San Diego County | — | — |
| Curva Construction | Ryan Mc Allister Curtis | ryan@curvaconstruction.com | (760) 815 5299 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Cusco Design And Build LLC | Duncan Greene Iii Howard | buildzoomsupport@blockrenovation.com | (626) 347 2379 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| Custom Awning & Canvas | Custom Awning & Canvas | — | (619) 260 1300 | Other | San Diego · San Diego County | — | — |
| Custom Builders | Custom Builders | — | (760) 473 9987 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Custom Builders Of California | Jeffrey Stewart Jester | guy@infinitydesignbuild.com | (760) 747 1207 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Builders Of California | Custom Builders Of California | — | (760) 747 1207 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Custom Built INC | Andy Lehto | mcbc@custombuilt.com | (760) 518 1623 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Custom Cabinet Restoration Specialists | Kleyde Issey Sofia Beltran Vazquez | — | (619) 227 2159 | Restoration | Chula Vista · San Diego County | — | — |
| Custom Cabinetry By Paul | Custom Cabinetry By Paul | — | (619) 672 2009 | Other | El Cajon · San Diego County | — | — |
| Custom Casework | Custom Casework | — | (619) 985 5717 | Other | Chula Vista · San Diego County | — | — |
| Custom Colored Coatings LLC | Jonathan Luke Nelson | — | (760) 214 8784 | Other | Encinitas · San Diego County | — | — |
| Custom Concept Construction | Stephen Meyers | marcel@goldenskydesign.com | (949) 289 3284 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Custom Construction By Lana Design Incorporated | Claudio Adrian Lana | — | (858) 552 8746 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Construction Company | Darren Lee Duda | — | (619) 993 7842 | GC, remodel, ADU | Jamul · San Diego County | — | — |
| Custom Constructs | Custom Constructs | customconstructz@gmail.com | (619) 458 8133 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Custom Creations By Alexander | Custom Creations By Alexander | — | (619) 395 5102 | Other | Chula Vista · San Diego County | — | — |
| Custom Decorative Landscapes | Christopher Steven Cabrera | — | (760) 277 7324 | Windows, patio, painters | Vista · San Diego County | — | — |