| Honolulu Painting Co Ltd | Honolulu Painting Co Ltd | — | (808) 839-2777 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Honolulu Roofing Crew | Honolulu Roofing Crew | — | (808) 207-3818 | Other roofers | Honolulu · Honolulu County | — | — |
| Honolulu Roofing Experts | Honolulu Roofing Experts | — | (808) 515-5898 | Other roofers | Honolulu · Honolulu County | — | — |
| Honolulu Sign Co Ltd | Honolulu Sign Co Ltd | %20terry@honolulusign.com | (808) 847-4047 | Other | Honolulu · Honolulu County | — | — |
| Honowai Painting LLC | Honowai Painting LLC | info@ndiscovered.com | (808) 330-4083 | Windows, patio, painters | Waipahu · Honolulu County | — | — |
| Hrc Roofing Company | Hrc Roofing Company | — | (808) 966-5422 | Other roofers | Keaau · Hawaii County | — | — |
| Hua Construction INC | Hua Construction INC | — | (808) 232-4121 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Huber Pools INC | Huber Pools INC | info@huberpools.com | (808) 879-0822 | GC, remodel, ADU | Kihei · Maui County | — | — |
| Hummel Construction LLC | Hummel Construction LLC | agency@mpressionspr.com | (770) 612-8330 | GC, remodel, ADU | Kailua Kona · Hawaii County | — | — |
| Hunakai Pool Service LLC | Hunakai Pool Service LLC | info@hunakaipools.com | (808) 724-7244 | Pool | Honolulu · Honolulu County | — | — |
| Hurricane Fabric Hawaii Island INC | Hurricane Fabric Hawaii Island INC | — | (808) 679-7695 | Windows, patio, painters | Kailua-Kona · Hawaii County | — | — |
| Hutton Construction LLC | Hutton Construction LLC | construction@hutton-group.co.uk | — | GC, remodel, ADU | Kula · Maui County | — | — |
| Hānai Brothers Restoration | Hānai Brothers Restoration | — | (808) 289-0818 | Restoration | Holualoa · Hawaii County | — | — |
| Icc Commonwealth Corporation | Icc Commonwealth Corporation | marketing-icc@icc-commonwealth.com | (716) 634-3967 | Other | Honolulu · Honolulu County | — | — |
| Icutv.company | Icutv.company | — | (808) 283-3068 | Alarm and generators | Wailuku · Maui County | — | — |
| Ig Steel LLC | Ig Steel LLC | info@ig-steel.com | (808) 883-9983 | Other | Kapolei · Honolulu County | — | — |
| Igloo AC LLC | Igloo AC LLC | arjuna@iglooac.com | — | HVAC | Kailua · Honolulu County | — | — |
| Ikaika Construction | Ikaika Construction | — | (808) 866-4044 | GC, remodel, ADU | Kihei · Maui County | — | — |
| Impact Builders INC | Impact Builders INC | admin@impactbuilders.com | (250) 470-7284 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Impact Painting | Impact Painting | — | (808) 753-4221 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Ims Masonry INC | Ims Masonry INC | estimates@imsmasonry.com | (801) 796-8420 | Other | Honolulu · Honolulu County | — | — |
| In Line Flooring INC | In Line Flooring INC | bids@inlineflooring.com | — | Other | Honolulu · Honolulu County | — | — |
| In Line Flooring LLC | In Line Flooring LLC | bids@inlineflooring.com | — | Other | Honolulu · Honolulu County | — | — |
| Industrial Railways Company | Industrial Railways Company | — | (707) 361-5732 | Other | Honolulu · Honolulu County | — | — |
| Infinity Pools Hawaii LLC | Infinity Pools Hawaii LLC | — | (808) 779-0274 | Pool | Honolulu · Honolulu County | — | — |
| Inline Construction LLC | Inline Construction LLC | — | (808) 368-5628 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Innovative Air Conditioning INC | Innovative Air Conditioning INC | info@innovativeairconditioning.com | (561) 471-1070 | HVAC | Honolulu · Honolulu County | — | — |
| Innovative Turf Solutions LLC | Innovative Turf Solutions LLC | hello@rfuenzalida.com | — | Other | Ewa Beach · Honolulu County | — | — |
| Inspect Hawaii | Inspect Hawaii | oscar@inspecthawaii.com | (808) 728-5707 | Inspectors | Honolulu · Honolulu County | — | — |
| Inspector Homes LLC | Inspector Homes LLC | — | (808) 336-7200 | Inspectors | Honolulu · Honolulu County | — | — |
| Inspired Play LLC | Inspired Play LLC | — | (808) 845-7788 | GC, remodel, ADU | Pearl City · Honolulu County | — | — |
| Integrated Electrical Systems Inc. | Integrated Electrical Systems Inc. | — | (808) 937-4013 | Electricians | Kailua-Kona · Hawaii County | — | — |
| Integrated Security Technologies | Integrated Security Technologies | — | (808) 836-4094 | Alarm and generators | Waipahu · Kalawao County | — | — |
| Integrity Systems LLC | Integrity Systems LLC | — | (949) 679-5800 | HVAC | Kihei · Maui County | — | — |
| Isaiah's Tree Service LLC | Isaiah's Tree Service LLC | info@isaiahstreeservice.com | (808) 631-6488 | Tree | Koloa · Kauai County | — | — |
| Isamu Construction LLC | Isamu Construction LLC | timothy@isamuconstruction.com | (808) 690-4099 | GC, remodel, ADU | Mililani · Honolulu County | — | — |
| Island Asphalt Maintenance INC | Island Asphalt Maintenance INC | jade@islandasphaltmaintenance.com | (808) 322-5672 | Other | Kailua Kona · Hawaii County | — | — |
| Island Beach Rentals LLC | Island Beach Rentals LLC | book@ibrhawaii.com | (800) 332-7081 | Property managers | Hawaii · Hawaii County | — | — |
| Island Breeze Remodelers LLC | Island Breeze Remodelers LLC | info@islandbreezeremodelers.com | (808) 698-5432 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Island Budget Painting Resources INC | Island Budget Painting Resources INC | islandbudgetpainting@gmail.com | (808) 255-8612 | Windows, patio, painters | Honolulu · Honolulu County | — | — |