| Contractor's Equipment & Service Corp | Contractor's Equipment & Service Corp | traciek@cescorphi.com | (808) 676-7566 | Other | Waipahu · Honolulu County | — | — |
| Cook Coatings INC | Cook Coatings INC | jane@company.com | — | Other roofers | Honolulu · Honolulu County | — | — |
| Cool Air INC | Cool Air INC | — | (904) 389-3646 | HVAC | Waipahu · Honolulu County | — | — |
| Cool Stone LLC | Cool Stone LLC | chris@coolstone.com | (425) 785-1998 | Other | Honolulu · Honolulu County | — | — |
| Cooling Solutions Hawaii LLC | Cooling Solutions Hawaii LLC | info@coolingsolutionshawaii.com | (808) 638-3633 | HVAC | Ewa Beach · Honolulu County | — | — |
| Cor-Ray Painting Co | Cor-Ray Painting Co | sales@corraypainting.com | — | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Cornerstone Properties | Cornerstone Properties | — | (808) 484-1211 | Property managers | Aiea · Honolulu County | — | — |
| Cosco Air Conditioning & Refrigeration | Cosco Air Conditioning & Refrigeration | — | (808) 845-2234 | HVAC | Honolulu · Honolulu County | — | — |
| Creative Building Concepts LLC | Creative Building Concepts LLC | interested@domainmarket.com | (888) 694-6735 | GC, remodel, ADU | Kailua · Honolulu County | — | — |
| Creative Tile Corp | Creative Tile Corp | info@creative-tile.com | — | Other | Honolulu · Honolulu County | — | — |
| Cubellis Plumbing LLC | Cubellis Plumbing LLC | — | (808) 226-9361 | Other | Honolulu · Honolulu County | — | — |
| Custom Electric LLC | Custom Electric LLC | estimating@customelectric.com | (587) 272-1800 | Electricians | Waialua · Honolulu County | — | — |
| Custom Mechanical Design LLC | Custom Mechanical Design LLC | info@custommechanicaldesign.com | (801) 296-2600 | HVAC | Kailua · Honolulu County | — | — |
| Cutting Edge Tile INC | Cutting Edge Tile INC | interested@domainmarket.com | (888) 694-6735 | Other | Aiea · Honolulu County | — | — |
| Cv Construction LLC | Cv Construction LLC | — | (949) 705-0400 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| D & C Construction INC | D & C Construction INC | — | (949) 679-5800 | GC, remodel, ADU | Kaneohe · Honolulu County | — | — |
| Dave Foster Builders INC | Dave Foster Builders INC | — | (808) 848-2101 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| David J Richardson | David J Richardson | david@solarsystemstudio.com | — | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Dc Asphalt Services INC | Dc Asphalt Services INC | dcadmin@hawaiiantel.net | (808) 839-4500 | GC, remodel, ADU | Kapolei · Honolulu County | — | — |
| Debiasi Pacific | Debiasi Pacific | — | (808) 732-5161 | Pool | Honolulu · Honolulu County | — | — |
| Design Craft LLC | Design Craft LLC | — | (847) 904-7000 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Di Electric LLC | Di Electric LLC | — | (800) 341-9678 | Electricians | Kaneohe · Honolulu County | — | — |
| Diamond Head Construction LLC | Diamond Head Construction LLC | — | (808) 679-6281 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Diamond Head Home Inspections | Diamond Head Home Inspections | info@dhhomeinspect.com | (808) 228-7478 | Inspectors | Honolulu · Honolulu County | — | — |
| Diamond Head Windows & Doors | Diamond Head Windows & Doors | info@diamondheadwindows.com | (808) 201-1134 | Windows, patio, painters | Aiea · Honolulu County | — | — |
| Diamond Painting | Diamond Painting | — | (808) 829-9433 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Digital Alarm Technology | Digital Alarm Technology | — | (808) 457-1353 | Alarm and generators | Honolulu · Honolulu County | — | — |
| Direct Contracting Company INC | Direct Contracting Company INC | — | (239) 994-9924 | Electricians | Waipahu · Honolulu County | — | — |
| Direct Electric Hawaii | Direct Electric Hawaii | — | (808) 554-2572 | Electricians | Waipahu · Honolulu County | — | — |
| Discount Window Tint Hawaii | Discount Window Tint Hawaii | — | (808) 227-7700 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Discount Windows & Doors | Discount Windows & Doors | — | (808) 673-6656 | Windows, patio, painters | Kaneohe · Honolulu County | — | — |
| Dk Construction Group LLC | Dk Construction Group LLC | dkconstructionllc@yahoo.com | (305) 986-7769 | Other | Kailua · Honolulu County | — | — |
| Dk Painting INC | Dk Painting INC | info@dkpainting.com | (972) 437-4949 | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Dpm Painting LLC | Dpm Painting LLC | dpmpaintingmaintenance@gmail.com | — | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| E I Electrical Inc. | E I Electrical Inc. | — | (808) 556-3744 | Electricians | Honolulu · Honolulu County | — | — |
| E3 Electrical INC | E3 Electrical INC | info@e3electrical.com | — | Electricians | Waianae · Honolulu County | — | — |
| Eagle Electric LLC | Eagle Electric LLC | — | (401) 596-8111 | Electricians | Kahuku · Honolulu County | — | — |
| Eagle Interiors INC | Eagle Interiors INC | interested@domainmarket.com | (888) 694-6735 | GC, remodel, ADU | Pearl City · Honolulu County | — | — |
| East Oahu Construction LLC | East Oahu Construction LLC | wweeiihhuuaanngg@gmail.com | (808) 690-0413 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| East Oahu Pools | East Oahu Pools | erikrutka@gmail.com | (808) 699-6792 | Pool | Honolulu · Honolulu County | — | — |