| Plumbing For Less | Plumbing For Less | — | (510) 455 1117 | Other | Oakland · Alameda County | — | — |
| Plumbing Guy & Trenchless | Plumbing Guy & Trenchless | — | (510) 415 0940 | Other | Hayward · Alameda County | — | — |
| Plumbing Heroes | Idan Cohen | — | (510) 631 4056 | Electricians | Alameda · Alameda County | — | — |
| Plumbing Masters | Plumbing Masters | — | (510) 489 2999 | Other | Union City · Alameda County | — | — |
| Plumbing Plus | Plumbing Plus | — | (510) 816 1818 | Other | Alameda · Alameda County | — | — |
| Plumbing Prodigy | Daniel Coronado | — | (510) 250 3454 | Other | Hayward · Alameda County | — | — |
| Plumbing Technology INC | Gary Lee Monica | — | (925) 963 9396 | Other | Livermore · Alameda County | — | — |
| Plumbing World | Plumbing World | — | (510) 686 0698 | Other | Hayward · Alameda County | — | — |
| Plus One Remodeling & Design INC | Yu Ronghui | — | (510) 833 8693 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Plus Ultra Landscaping | Plus Ultra Landscaping | — | (510) 381 4590 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Pmg Construction | Moreno Gomez Pedro | — | (510) 878 0018 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Pnh Construction | Rickard Stanley Watt | — | (925) 580 8086 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Pogo Construction | Batdelger Tsedevsuren | — | (510) 207 1347 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Point One Electrical Systems INC | Michael George Curran | — | (925) 667 2950 | Electricians | Livermore · Alameda County | — | — |
| Pointvertex Construction | Edgar Antonio Evangelia | — | (510) 859 7448 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Pointy Construction INC | Elaine Dan Lin | — | (650) 307 2618 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Polanco Pro Construction INC | Elmer Noe Polanco Cabezas | — | (510) 253 9496 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Polanco's Carpentry INC | Hector Manuel Polanco Barahona | polcarinc2017@gmail.com | (510) 586 3629 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Polar Coatings Company | Phillip Thomas Skeim | — | (925) 292 9427 | Other | Livermore · Alameda County | — | — |
| Polishedcrete | Ryan Thomas Chance | — | (925) 245 8900 | Other | Livermore · Alameda County | — | — |
| Polo's Professional Painting | Polo's Professional Painting | — | (510) 828 5279 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Polymer Floor & Wall Coating Systems | Theodorus Hermanus Van De Sande | — | (888) 887 0483 | Other | Castro Valley · Alameda County | — | — |
| Ponderosa Homes Ii INC | Linda Francine Morasch | — | (925) 460 8900 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Ponderosa Tree Service INC | Michael Francis Veneziano | — | (510) 845 3644 | Tree | Berkeley · Alameda County | — | — |
| Positive Integration | Positive Integration | — | (510) 302 7015 | Electricians | Alameda · Alameda County | — | — |
| Positive Plumbing And Drain Cleaning | Positive Plumbing And Drain Cleaning | — | (925) 455 5200 | Other | Livermore · Alameda County | — | — |
| Possible General Construction | Jose Luis Gonzalez Contreras | — | (510) 776 2135 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Post And Beam Properties | Post And Beam Properties | — | (510) 812 2032 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Potter Fire Protection INC | Jeanne Eloise Potter | — | (510) 581 3473 | Other | Hayward · Alameda County | — | — |
| Pound Co | Leslie Brian Alspach | — | (510) 653 0800 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Power & Light | Power & Light | — | (781) 281-9475 | Electricians | Oakland · Alameda County | — | — |
| Power Engineering Construction Company | Wayne Daniel Stonecipher | — | (510) 337 3800 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Power Link | Power Link | rentbaysidecottages@gmail.com | (510) 934 6130 | Electricians | Hayward · Alameda County | — | — |
| Power On Electric | Rowhani Ron | — | (415) 425 4763 | Electricians | Dublin · Alameda County | — | — |
| Power Plumbing & Rooter | Power Plumbing & Rooter | — | (510) 584 7693 | Other | Union City · Alameda County | — | — |
| Power Pro Sg Electric INC | Salvador Gonzalez | — | (510) 309 5444 | Electricians | Oakland · Alameda County | — | — |
| Power Systems Testing Co | Jason Benjamin Martin | — | (510) 783 5096 | Electricians | Livermore · Alameda County | — | — |
| Power To The People LLC | Erwin Dizon Laus | — | (415) 359 6148 | Electricians | Oakland · Alameda County | — | — |
| Power Up Electrical | Daniel Robert Mitlo | larvellh@power-up-electrical.com | (510) 862 2321 | Electricians | San Lorenzo · Alameda County | — | — |
| Power Washing Services INC | Susan Nakleh Lahdo | — | (925) 292 8809 | Other | Livermore · Alameda County | — | — |