| Presidential | James Robert Jordan | — | (510) 599 9428 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Presidio Systems INC | Joseph Patrick Schratz | — | (925) 456 8400 | Electricians | Livermore · Alameda County | — | — |
| Prestige Builders & Design | Diaz Jose Amaya | info@prestigebuildersdesign.com | (561) 902-9150 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Prestige Construction LLC | Nolan Patrick Floyd | — | (510) 926 9105 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Prestige Electric | Luis Manuel Zamora | — | (925) 980 4417 | Electricians | Livermore · Alameda County | — | — |
| Prestige Painting Company | Mariana Ascencion Triviso | — | (925) 207 5743 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Preston Landscaping | Preston Landscaping | contactus@prestonlandscaping.com | (925) 752 0557 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Preston Louis Dixon INC DBA Bio Friendly Gardens | Preston Louis Dixon | — | (510) 843 5232 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Pride & Joy Home Improvement | Pride & Joy Home Improvement | — | (510) 501 0677 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Prima Building Supply INC | Iwan Murtanu | — | (510) 687 1887 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Prime Builders Develop INC | Jong Kun Kim | — | (408) 680 3777 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Prime Electro - Motors | Prime Electro - Motors | — | (510) 862 5874 | Electricians | Union City · Alameda County | — | — |
| Prime Mechanical Service INC | John Matthew Eshelman | micah@micahrich.com | (877) 635 4328 | HVAC | Livermore · Alameda County | — | — |
| Prime Power LLC | Jonathan Thomas Auer | — | (209) 800 6626 | Electricians | Oakland · Alameda County | — | — |
| Prime Time Painting | Prime Time Painting | — | (650) 619 5419 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Prime-builder INC Which Will Do Business In California As Prime- | Zarate Gabriel | — | (510) 754 7666 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Primebranch Alameda Tree Service | Primebranch Alameda Tree Service | hello@alamedatreeservices.com | (341) 225-0169 | Tree | Alameda · Alameda County | — | — |
| Primetech LLC | Danilo Santos Sr Marques | — | (754) 261 9672 | Electricians | Fremont · Alameda County | — | — |
| Primitivo Construction INC | Garcia Sofia | primitivos@att.net | (925) 484 8434 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Primo Pools | Primo Pools | — | (510) 377 1313 | Pool | Newark · Alameda County | — | — |
| Priority Acquisitions INC | Jeremy Ryan Musson | — | (510) 760 3155 | GC, remodel, ADU | Dublin · Alameda County | — | — |
| Priority Construction & General Maintenance INC | Arturo Martinez| Duran Jose A Duran | — | (510) 506 0036 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Prism Engineering INC | Khaled Ahmad Slayyeh | — | (408) 426 0279 | Electricians | Hayward · Alameda County | — | — |
| Pristine Landscapes | Pristine Landscapes | — | (925) 580 8028 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Pristine Pools Complete Pool Maintenance And Repair | Matthew Kenneth Vieira | — | (925) 777 1297 | Pool | Livermore · Alameda County | — | — |
| Pristine Pools Renovation INC | Matthew Kenneth Vieira | — | (925) 777 1297 | Pool | Livermore · Alameda County | — | — |
| Pro Attic Restoration INC | Leonardo Ramon Velasquez Cotom | — | (510) 514 7108 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Pro Fas Construction | Song Jinxiao | — | (669) 224 0942 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Pro Fence Company | Diaz Saul | — | (510) 861 1517 | Other | Hayward · Alameda County | — | — |
| Pro Home Systems | Thomas Anthony George | info@prohomesystems.com | (925) 833 8716 | Electricians | Dublin · Alameda County | — | — |
| Pro Insulation & Rodents LLC | Lynette Colleen Watkins | — | (510) 265 4416 | Other | Hayward · Alameda County | — | — |
| Pro Roofing Maintenance | Kisoo An | — | (510) 913 1812 | Other roofers | Castro Valley · Alameda County | — | — |
| Pro Rooter INC | Philip Jinhwan| Oh Jinhwan Oh | — | (510) 670 1115 | Other | San Leandro · Alameda County | — | — |
| Pro-care Restoration INC | Nuno Jesse | — | (510) 807 2473 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Pro-tech Maintenance & Repair | Pro-tech Maintenance & Repair | — | (925) 833 0994 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Pro-techs Security LLC | Brian Keith Jayne | — | (925) 337 4394 | Electricians | Dublin · Alameda County | — | — |
| Pro-ton Electric | John Jan Niemiec | doug@protonelectric.com | (561) 547-0027 | Electricians | Pleasanton · Alameda County | — | — |
| Proactive Marble & Granite | Proactive Marble & Granite | — | (925) 339 4107 | Other | Livermore · Alameda County | — | — |
| Probuild Construction & Design INC | Jie Yu | — | (510) 770 7616 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Procare Commercial Services INC | Paul Thomas Michelsen | — | (510) 675 0675 | GC, remodel, ADU | Hayward · Alameda County | — | — |