| Z R Built Homes | Z R Built Homes | — | (818) 744 6416 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Z Signs & Graphics INC | Tamim Zahir | — | (805) 304 7273 | Other | Simi Valley · Ventura County | — | — |
| Z&v Drywall | Zeferino Navarrete-Ramirez | navarretez805@gmail.com | (805) 240 6964 | Other | Oxnard · Ventura County | — | — |
| Zabel Dabel Co | Dane Gregory Zabel | — | (805) 404 7620 | Other | Moorpark · Ventura County | — | — |
| Zacarias Builders INC | Sergio Javier Zacarias | — | (805) 657 8098 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Zachammer Construction | Zachary Todd Jirkovsky | — | (805) 479 3312 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Zachary Langlois General Contractor | Zachary Langlois General Contractor | — | (805) 304 1984 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Zakreia Agaiby | Zakreia Agaiby | — | (805) 256 5354 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Zamecki Plumbing | Zamecki Plumbing | — | (805) 340 7754 | Other | Oxnard · Ventura County | — | — |
| Zamora Landscaping LLC | Alberto Jr Zamora Martinez | — | (805) 861 4112 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Zamorano's Roofing INC | Madrigal Jorge Gutierrez | — | (805) 509 4956 | Other roofers | Ventura · Ventura County | — | — |
| Zane Arlon Street DBA Top Floor | Top Floor | — | (818) 384 9461 | Other | Moorpark · Ventura County | — | — |
| Zargar Corporation | Pejvak Foroohar | — | (805) 214 0992 | Other | Thousand Oaks · Ventura County | — | — |
| Zb Construction | Bojorquez Zamar | — | (805) 390 6031 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Zdwellings INC | Jeffrey Dale Zimmerman | — | (805) 208 9357 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Zel Electric | German Israel Zelaya | zel1@zelelectric.com | (818) 306 4935 | Electricians | Simi Valley · Ventura County | — | — |
| Zel Electric | German Israel Zelaya | zel1@zelelectric.com | (818) 306 4935 | Electricians | Simi Valley · Ventura County | — | — |
| Zeller Electric Corp | Laura Jean Zeller | — | (805) 499 2829 | Electricians | Newbury Park · Ventura County | — | — |
| Zenith Landscaping INC | Raul Diaz | — | (805) 873 7778 | Windows, patio, painters | Santa Paula · Ventura County | — | — |
| Zeolla Marble Company INC DBA John Zeolla Marble | Mark Vincent Zeolla | — | (818) 344 3219 | Other | Westlake Village · Ventura County | — | — |
| Zk Building And Development INC | Zareh Keshmeshian | — | (805) 338 4605 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Zuma Construction Group INC | Raji Mahyar | — | (760) 423 7673 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Zwaag Construction | Steven Andrew Vander Zwaag | — | (805) 390 7040 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |