| Kauai Island Screen Specialists | Kauai Island Screen Specialists | — | (808) 720-2688 | Windows, patio, painters | Kilauea · Kauai County | — | — |
| Kauai Landscaping Professionals | Kauai Landscaping Professionals | — | (808) 278-3651 | Tree | Lihue · Kauai County | — | — |
| Kauai Maintenance & Construction INC | Kauai Maintenance & Construction INC | — | (808) 635-5040 | GC, remodel, ADU | Kalaheo · Kauai County | — | — |
| Kauai Mechanical INC | Kauai Mechanical INC | info@kauaimechanical.com | (808) 822-2770 | HVAC | Lihue · Kauai County | — | — |
| Kauai Mold Water Fire | Kauai Mold Water Fire | contact@kauaimold.com | (808) 635-8100 | Restoration | Kilauea · Kauai County | — | — |
| Kauai Nursery & Landscaping INC | Kauai Nursery & Landscaping INC | knl@kauainursery.com | (808) 245-7747 | GC, remodel, ADU | Lihue · Kauai County | — | — |
| Kauai Pool & Spa | Kauai Pool & Spa | brad@kauaipoolandspa.com | (808) 634-0004 | Pool | Kauai · Kauai County | — | — |
| Kauai Pool Care | Kauai Pool Care | — | (808) 635-8369 | Pool | Kapaʻa · Kauai County | — | — |
| Kauai Refrigeration Services. | Kauai Refrigeration Services. | — | (808) 245-2901 | HVAC | Lihue · Kauai County | — | — |
| Kauai Remodeling INC | Kauai Remodeling INC | — | (808) 634-8612 | Other roofers | Kapaa · Kauai County | — | — |
| Kauai Rentals And Real Estate | Kauai Rentals And Real Estate | rachono@gmail.com | (808) 245-3343 | Property managers | Lihue · Kauai County | — | — |
| Kauai Screens & Jalousie INC | Kauai Screens & Jalousie INC | — | (808) 245-6181 | Windows, patio, painters | Lihue · Kauai County | — | — |
| Kauai Seascapes Nursery INC | Kauai Seascapes Nursery INC | info@kauaiseascapesnursery.com | — | Windows, patio, painters | Kilauea · Kauai County | — | — |
| Kauai Seaside Properties | Kauai Seaside Properties | — | (808) 212-1400 | Property managers | Kapaʻa · Kauai County | — | — |
| Kauai Society Of Artists | Kauai Society Of Artists | — | (808) 245-2782 | Windows, patio, painters | Lihue · Kauai County | — | — |
| Kauai Vacation Rentals & Real Estate INC | Kauai Vacation Rentals & Real Estate INC | — | (808) 245-8841 | Property managers | Lihue · Kauai County | — | — |
| Kauaʻi Community College | Kauaʻi Community College | — | (808) 245-8311 | HVAC | Lihue · Kauai County | — | — |
| Kaulana Pest Control | Kaulana Pest Control | aloha@kaulanapest.com | (808) 676-1041 | Pest, tile roofs | Waipahu · Kalawao County | — | — |
| Kawika's Painting INC | Kawika's Painting INC | oahuadmin@kawikaspainting.com | (808) 848-0003 | Other roofers | Honolulu · Honolulu County | — | — |
| Kazuo Saito | Kazuo Saito | ksaito.funabashi@gmail.com | — | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Kazuo's Pool & Spa Services LLC | Kazuo's Pool & Spa Services LLC | — | (808) 228-2717 | Pool | Honolulu · Honolulu County | — | — |
| Kcn Services - Security Camera Hawaii Honolulu Oahu | Kcn Services - Security Camera Hawaii Honolulu Oahu | — | (808) 589-0000 | Alarm and generators | Honolulu · Honolulu County | — | — |
| Ke Nui Construction LLC | Ke Nui Construction LLC | info@kenuiconstruction.com | — | GC, remodel, ADU | Aiea · Honolulu County | — | — |
| Keith Chapman | Keith Chapman | keithgchapman@gmail.com | (765) 586-4431 | GC, remodel, ADU | Kailua Kona · Hawaii County | — | — |
| Kekahu Concrete LLC | Kekahu Concrete LLC | kekahuconcretellc@gmail.com | (808) 747-5138 | Other | Keaau · Hawaii County | — | — |
| Kela Construction Inc. | Kela Construction Inc. | — | (808) 737-1971 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Ken Do Construction INC | Ken Do Construction INC | — | (808) 639-3525 | GC, remodel, ADU | Koloa · Kauai County | — | — |
| Ken's Masonry INC | Ken's Masonry INC | astigma@astigmatic.com | (480) 915-8728 | Other | Kailua Kona · Hawaii County | — | — |
| Kendall Landscape Services | Kendall Landscape Services | — | (808) 674-7608 | Tree | Honolulu · Honolulu County | — | — |
| Kennedy Construction Corp | Kennedy Construction Corp | rekconst@gmail.com | (989) 239-4896 | GC, remodel, ADU | Other County | — | — |
| Kikiaola Construction Co. | Kikiaola Construction Co. | — | (808) 338-0021 | GC, remodel, ADU | Waimea · Kauai County | — | — |
| Kilauea Home Inspections | Kilauea Home Inspections | — | (808) 841-4663 | Inspectors | Honolulu · Honolulu County | — | — |
| Kilauea Pest Control | Kilauea Pest Control | — | (808) 236-2847 | Pest, tile roofs | Kailua · Honolulu County | — | — |
| Kilauea Pest Control | Kilauea Pest Control | — | (808) 871-1283 | Pest, tile roofs | Kahului · Maui County | — | — |
| Kilohana Electric | Kilohana Electric | — | (808) 822-0800 | Electricians | Kapaʻa · Kauai County | — | — |
| Kimoto Roofing LLC | Kimoto Roofing LLC | info@kimotoroofing.com | (808) 772-7728 | Other roofers | Honolulu · Honolulu County | — | — |
| Kina'ole Home Inspection Services L.l.c. | Kina'ole Home Inspection Services L.l.c. | — | (808) 769-0095 | Inspectors | Kailua-Kona · Hawaii County | — | — |
| King's Painting LLC | King's Painting LLC | interested@domainmarket.com | (888) 694-6735 | GC, remodel, ADU | Wailuku · Maui County | — | — |
| King's Roofing | King's Roofing | — | (808) 834-7663 | Other roofers | Honolulu · Honolulu County | — | — |
| Kingdom Roofing LLC | Kingdom Roofing LLC | billy@kingdomroofing.com | (817) 235-1394 | Other roofers | Wailuku · Maui County | — | — |