| R & S Quality Painting | R & S Quality Painting | — | (808) 639-8587 | Windows, patio, painters | Kapaʻa · Kauai County | — | — |
| R S Weir General Contracting | R S Weir General Contracting | — | (808) 822-2882 | GC, remodel, ADU | Kapaʻa · Kauai County | — | — |
| R.i.p. Air Conditioning | R.i.p. Air Conditioning | — | (808) 495-6914 | HVAC | Kahului · Maui County | — | — |
| Rainbow Glass & Mirror | Rainbow Glass & Mirror | — | (808) 661-6611 | Windows, patio, painters | Lahaina · Maui County | — | — |
| Rainbow Restoration Of Oahu | Rainbow Restoration Of Oahu | — | (808) 466-0660 | Restoration | Wahiawa · Honolulu County | — | — |
| Rainbow Trees Landscaping Services | Rainbow Trees Landscaping Services | — | (808) 651-6667 | Tree | Kalaheo · Kauai County | — | — |
| Ralph S. Inouye Co. Ltd. | Ralph S. Inouye Co. Ltd. | — | (808) 839-9002 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Raymond's Painting Co | Raymond's Painting Co | — | (808) 842-1117 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Raynor Hawaii Overhead Doors | Raynor Hawaii Overhead Doors | — | (808) 676-3667 | Windows, patio, painters | Pearl City · Kalawao County | — | — |
| Rc Plumbing LLC | Rc Plumbing LLC | randy@rcplumbing.com | (909) 437-7869 | HVAC | Kailua-Kona · Hawaii County | — | — |
| Rcm Construction Corporation | Rcm Construction Corporation | richard@rcmconstruction.com | (808) 545-2177 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Real Property Management Honolulu | Real Property Management Honolulu | — | (808) 445-6207 | Property managers | Honolulu · Honolulu County | — | — |
| Real Property Management Island Professionals | Real Property Management Island Professionals | — | (808) 663-2533 | Property managers | Lihue · Kauai County | — | — |
| Redwater Construction LLC | Redwater Construction LLC | randyring@hawaiiantel.net | — | GC, remodel, ADU | Kamuela · Hawaii County | — | — |
| Reflections Glass Kaua'i | Reflections Glass Kaua'i | info@reflections-glass.com | (808) 977-7299 | Windows, patio, painters | Lihue · Kauai County | — | — |
| Reflections Glass Maui | Reflections Glass Maui | — | (808) 676-6767 | Windows, patio, painters | Wailuku · Maui County | — | — |
| Refrigeration & Air Conditioning Repairs Hawaii Big Island | Refrigeration & Air Conditioning Repairs Hawaii Big Island | — | (808) 300-8761 | HVAC | Kailua-Kona · Hawaii County | — | — |
| Refrigeration Unlimited LLC | Refrigeration Unlimited LLC | interested@domainmarket.com | (888) 694-6735 | HVAC | Honolulu · Honolulu County | — | — |
| Regis Electric LLC | Regis Electric LLC | office@regiselectric.com | (808) 854-6484 | Electricians | Kailua-Kona · Hawaii County | — | — |
| Renewable Energy Technologies LLC | Renewable Energy Technologies LLC | sales@renewableenergytechnologies.com | — | Electricians | Lihue · Kauai County | — | — |
| Rental Property Management Hawaii LLC | Rental Property Management Hawaii LLC | — | (808) 203-3819 | Property managers | Honolulu · Honolulu County | — | — |
| Rentals Maui Inc. 201 | Rentals Maui Inc. 201 | aloha@rentalsmaui.com | (808) 879-2700 | Property managers | Kihei · Maui County | — | — |
| Repcon INC | Repcon INC | — | (800) 383-8681 | Other | Honolulu · Honolulu County | — | — |
| Replacement Windows Hawaii | Replacement Windows Hawaii | — | (808) 214-2911 | Windows, patio, painters | Wailuku · Maui County | — | — |
| Rescue One Restoration | Rescue One Restoration | info@rescueonerestoration.us | (808) 745-1608 | Restoration | Honolulu · Honolulu County | — | — |
| Rescue Services | Rescue Services | — | (808) 246-0405 | Restoration | Lihue · Kauai County | — | — |
| Resorticahawaii.com Inc. | Resorticahawaii.com Inc. | — | (808) 881-8222 | Property managers | Hawaii · Hawaii County | — | — |
| Revolusun LLC | Revolusun LLC | — | (808) 201-4723 | HVAC | Honolulu · Honolulu County | — | — |
| Ridgeline Homes INC | Ridgeline Homes INC | eben@eyebytes.com | (406) 518-1875 | GC, remodel, ADU | Kahului · Maui County | — | — |
| Right-Now Restoration | Right-Now Restoration | — | (866) 499-5897 | Restoration | Honolulu · Honolulu County | — | — |
| Rm Builders LLC | Rm Builders LLC | — | (408) 628-3110 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Rmi Mechanical INC | Rmi Mechanical INC | info@rmimechanical.com | (808) 422-5454 | HVAC | Honolulu · Honolulu County | — | — |
| Rmt Enterprises Security Division | Rmt Enterprises Security Division | rnakooka@msn.com | (808) 937-3452 | Alarm and generators | Honokaa · Hawaii County | — | — |
| Robert W Love | Robert W Love | rwglove@gmail.com | — | Electricians | Kailua · Honolulu County | — | — |
| Robert's Air Conditioning Services | Robert's Air Conditioning Services | — | (808) 557-3694 | HVAC | Hoa · Hawaii County | — | — |
| Rock Solid Home Inspections LLC (hawaii) | Rock Solid Home Inspections LLC (hawaii) | jt@rshomeinspections.com | (808) 895-4952 | Inspectors | Hawi · Hawaii County | — | — |
| Rojac Construction INC | Rojac Construction INC | — | (808) 986-1105 | GC, remodel, ADU | Wailuku · Maui County | — | — |
| Ron's Electric Co | Ron's Electric Co | — | (808) 245-4611 | Electricians | Lihue · Kauai County | — | — |
| Roofing 808 Maui And Waterproofing | Roofing 808 Maui And Waterproofing | — | (808) 868-6551 | Other roofers | Kahului · Maui County | — | — |
| Roofworks Hawaii INC | Roofworks Hawaii INC | — | (808) 247-5243 | Other roofers | Kaneohe · Honolulu County | — | — |