| Ohana Restoration | Ohana Restoration | — | (808) 400-4357 | Restoration | Honolulu · Honolulu County | — | — |
| Ohana Tree Service | Ohana Tree Service | ohanaclimbs@gmail.com | (970) 355-8359 | Tree | Honolulu · Honolulu County | — | — |
| Ohana Tree Services Inc. | Ohana Tree Services Inc. | admin@ohanatreeservicesinc.com | (808) 520-0186 | Tree | Mililani · Kalawao County | — | — |
| Ohana Tree Services,inc. | Ohana Tree Services,inc. | admin@ohanatreeservicesinc.com | (855) 321-3286 | Windows, patio, painters | Mililani · Honolulu County | — | — |
| Oishi's Property Management | Oishi's Property Management | — | (808) 949-9499 | Property managers | Honolulu · Honolulu County | — | — |
| Olson Homes INC | Olson Homes INC | homeowner@theolsonco.com | (562) 596-4770 | GC, remodel, ADU | Kalaheo · Kauai County | — | — |
| On Top Roofing LLC | On Top Roofing LLC | — | (808) 744-7144 | Other roofers | Aiea · Kalawao County | — | — |
| One Cut Construction LLC | One Cut Construction LLC | lucasonecut@gmail.com | (613) 899-8453 | GC, remodel, ADU | Other County | — | — |
| One Cut Maui | One Cut Maui | treylightner@gmail.com | (808) 344-6319 | Tree | Maui · Maui County | — | — |
| One Stop Windows & Doors | One Stop Windows & Doors | — | (808) 550-2402 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Opconnect Charging Station | Opconnect Charging Station | — | (855) 885-9571 | EV chargers | Honolulu · Honolulu County | — | — |
| Optimal Designs LLC | Optimal Designs LLC | interested@domainmarket.com | (888) 694-6735 | Other | Honolulu · Honolulu County | — | — |
| Opus Group Construction LLC | Opus Group Construction LLC | — | (808) 225-3963 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Orkin | Orkin | — | (808) 354-0869 | Pest, tile roofs | Honolulu · Honolulu County | — | — |
| Orkin | Orkin | — | (808) 657-6516 | Pest, tile roofs | Waimea · Hawaii County | — | — |
| Orkin | Orkin | — | (808) 495-8214 | Pest, tile roofs | Kahului · Maui County | — | — |
| P B Sullivan Construction INC | P B Sullivan Construction INC | — | (808) 875-2833 | GC, remodel, ADU | Kihei · Maui County | — | — |
| Pac Build LLC | Pac Build LLC | — | (408) 354-0005 | GC, remodel, ADU | Koloa · Kauai County | — | — |
| Paccon Construction INC | Paccon Construction INC | — | (808) 478-6882 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Pacific Aquascapes | Pacific Aquascapes | — | (808) 682-1020 | Pool | Kapolei · Honolulu County | — | — |
| Pacific Audio & Communications Maui | Pacific Audio & Communications Maui | — | (808) 320-8463 | Alarm and generators | Kihei · Maui County | — | — |
| Pacific Blue Construction LLC | Pacific Blue Construction LLC | info@pacificblueconstruction.com | (818) 703-7444 | Other roofers | Lihue · Kauai County | — | — |
| Pacific Build LLC | Pacific Build LLC | admin@pacific-build.com | — | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Pacific Central Electric | Pacific Central Electric | — | (808) 545-2029 | Electricians | Honolulu · Honolulu County | — | — |
| Pacific Coast Properties Inc. | Pacific Coast Properties Inc. | — | (808) 775-9566 | Property managers | Honokaa · Kalawao County | — | — |
| Pacific Coatings INC | Pacific Coatings INC | — | (951) 870-6923 | Windows, patio, painters | Kapaa · Kauai County | — | — |
| Pacific Construction Builders INC | Pacific Construction Builders INC | — | (800) 323-9895 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Pacific Decorative Concrete INC | Pacific Decorative Concrete INC | interested@domainmarket.com | (888) 694-6735 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Pacific Detection INC | Pacific Detection INC | — | (808) 691-9724 | Alarm and generators | Pearl City · Honolulu County | — | — |
| Pacific Dynamics Corp | Pacific Dynamics Corp | info@pacific-dynamics.com | — | GC, remodel, ADU | Kailua · Honolulu County | — | — |
| Pacific Exterior MaintenanceProtected | Pacific Exterior Maintenance | — | (808) 351-3901 | Tile roofers | Kailua-Kona · Hawaii County | — | — |
| Pacific Floor Covering LLC | Pacific Floor Covering LLC | — | (808) 465-2766 | Other | Pearl City · Honolulu County | — | — |
| Pacific Island Air Tech Co INC | Pacific Island Air Tech Co INC | info@pacificislandairtech.com | (808) 845-2345 | HVAC | Honolulu · Honolulu County | — | — |
| Pacific Isle Properties | Pacific Isle Properties | — | (808) 930-4642 | Property managers | Hilo · Hawaii County | — | — |
| Pacific Isle Shades | Pacific Isle Shades | — | (808) 264-1325 | Windows, patio, painters | Kahului · Maui County | — | — |
| Pacific Mirror & Glass LLC | Pacific Mirror & Glass LLC | sales@pacmirror.com | (808) 635-9696 | Windows, patio, painters | Kapaʻa · Kauai County | — | — |
| Pacific Playscapes INC | Pacific Playscapes INC | sales@pacificplayscapeshi.com | (808) 725-1699 | GC, remodel, ADU | Kailua · Honolulu County | — | — |
| Pacific Plumbing INC | Pacific Plumbing INC | service@pacific-plumbing.com | (905) 561-3747 | Other | Pearl City · Honolulu County | — | — |
| Pacific Pool & Spa | Pacific Pool & Spa | — | (808) 261-3530 | Pool | Kailua · Honolulu County | — | — |
| Pacific Power & Light LLC | Pacific Power & Light LLC | — | (808) 990-4411 | Electricians | Honolulu · Honolulu County | — | — |