| Conserve Water Landscaping | Conserve Water Landscaping | — | (760) 715 6479 | Windows, patio, painters | Escondido · San Diego County | — | — |
| Considine Construction | Wayne Malcolm Considine | — | (401) 787 1120 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Consolidated Building Systems INC | Louis Edward Suter | — | (619) 741 4566 | HVAC | El Cajon · San Diego County | — | — |
| Constructed Concepts | Lauren Allister Young | — | (267) 469 1950 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction 10C | Jimenez Alvarado Benito | — | (619) 288 2198 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction And Mechanical Partners INC | Ronald Howard Mason | — | (760) 270 3785 | HVAC | Escondido · San Diego County | — | — |
| Construction By Blue Sky INC | Jonathan Orlando Sanchez | — | (760) 443 5100 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Construction By Smith | Kipp Patrick Smith | — | (619) 997 6008 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Construction Cleaning Services INC | Giddens Wash | — | (619) 303 0412 | Other | Bonita · San Diego County | — | — |
| Construction Concepts | Daniel William Dixon | info@constructionconcepts.com | (760) 610 4234 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Construction Conveyors INC DBA The Landscape Company | Kenneth Wyndel Paddock | sales@tlcofsd.com | (858) 275 6300 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction Development Services | Cory Duane Souza | — | (760) 419 1239 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Construction Diversified | Lopez Oscar | — | (619) 710 7299 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction Management Services | William David Saumier | — | (619) 244 6290 | Other | Spring Valley · San Diego County | — | — |
| Construction Networks INC | Timothy Lee Weatherwax | — | (951) 813 9936 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Construction Plus | Yuriy Nikolayevich Buzcko | — | (858) 405 1565 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction Real Estate INC | Jesse Caleb Frey | — | (760) 533 8032 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Construction Remodeling Partnership INC | Ghullam Reza Khavari | — | (619) 343 4049 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction Rescue | David Henry Hayles | — | (213) 700 4331 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Construction Resources INC | David Charles Fish | — | (310) 773 1227 | GC, remodel, ADU | Rancho Santa Fe · San Diego County | — | — |
| Construction Services & Associates | Douglas Edward Manning | — | (619) 504 2542 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| Construction Solutions | Dale Robert Prewett | — | (760) 535 3178 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Construction Solutions Group INC | Petrosyan Stanislav | — | (619) 708 3261 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Construction Support Services | Adam Allison Jovin | — | (760) 580 4285 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Construction West | Jeffrey Elger Brand | aqremodeling2@gmail.com | (858) 735 0468 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Construction Wonders | Jacob Lawrence Wonders | ake@constructionwonders.com | (619) 813 4484 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Constructora Ebenezer General Contracting | Hernandez Valentin | — | (760) 535 2546 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Constructora Santa Fe INC | Christopher Robin Martin | eyoproyectos@constructorasantafe.com | (760) 450 6205 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Consulting + Construction | Marco Antonio Villalpando | — | (619) 572 0267 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Contardi Construction | Michael Alan Contardi | — | (760) 840 9378 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Contasti Construction Co | Andrew Peter Contasti | — | (858) 353 5024 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Contemporary Design Landscape | Contemporary Design Landscape | — | (760) 807 9056 | Windows, patio, painters | Escondido · San Diego County | — | — |
| Contemporary Surface Solutions LLC | Gillian Marie Nielsen | — | (619) 938 4733 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Conterra INC | Sven Michael Falk | — | (619) 312 2911 | Other | Santee · San Diego County | — | — |
| Continental Construction & Development | Ruslan Grub | guy@infinitydesignbuild.com | (858) 361 2548 | HVAC | San Diego · San Diego County | — | — |
| Continental Construction Maintenance Service | Soghomonian Shant | — | (760) 505 0082 | GC, remodel, ADU | Valley Center · San Diego County | — | — |
| Continental Custom Iron INC | Luis Thomas Palomo-Origel | — | (619) 621 9829 | Other | Chula Vista · San Diego County | — | — |
| Continental Environmental Solutions INC | Quincy Brandon Robinson | — | (619) 944 3558 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Continental Glass & Mirror Of San Diego | Terrin Karl Keefer | — | (619) 672 0989 | Windows, patio, painters | Alpine · San Diego County | — | — |
| Continental Maritime Of San Diego LLC | Juan Carlos Aguayo | — | (619) 234 8851 | GC, remodel, ADU | San Diego · San Diego County | — | — |