| Kk Air Conditioning | Kk Air Conditioning | — | (808) 680-0143 | HVAC | Pearl City · Honolulu County | — | — |
| Kktf Hawaii LLC | Kktf Hawaii LLC | freeestimate@kktfhawaii.com | (808) 200-0562 | Windows, patio, painters | Waipahu · Honolulu County | — | — |
| Km Electrical Services INC | Km Electrical Services INC | — | (808) 595-4503 | Electricians | Honolulu · Honolulu County | — | — |
| Knoles Electric LLC | Knoles Electric LLC | info@knoleselectric.com | (808) 600-8816 | Electricians | Honolulu · Honolulu County | — | — |
| Knutson & Associates | Knutson & Associates | — | (808) 329-1010 | Property managers | Kailua-Kona · Hawaii County | — | — |
| Kohala Tree Service LLC | Kohala Tree Service LLC | — | (808) 333-8031 | Tree | Kapaau · Kalawao County | — | — |
| Koko Head Pool Service | Koko Head Pool Service | — | (808) 399-4388 | Pool | Honolulu · Honolulu County | — | — |
| Kokua Construction | Kokua Construction | — | (808) 343-9349 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Kokua Tree Care | Kokua Tree Care | — | (808) 419-8998 | Tree | Makawao · Maui County | — | — |
| Koloa Kai | Koloa Kai | — | (808) 638-2501 | Property managers | Kalaheo · Kauai County | — | — |
| Kona Air Conditioning | Kona Air Conditioning | — | (808) 326-7700 | HVAC | Kailua-Kona · Hawaii County | — | — |
| Kona Coast Pest Control | Kona Coast Pest Control | — | (808) 334-1900 | Pest, tile roofs | Kailua-Kona · Hawaii County | — | — |
| Kona Coast Property Management LLC | Kona Coast Property Management LLC | — | (808) 329-2140 | Property managers | Kailua-Kona · Hawaii County | — | — |
| Kona Electric LLC License #ct-38225 | Kona Electric LLC License #ct-38225 | — | (808) 989-5272 | Electricians | Kealakekua · Hawaii County | — | — |
| Kona Industries Inc. | Kona Industries Inc. | konaindustries@hawaiiantel.net | (808) 329-7789 | HVAC | Kailua-Kona · Hawaii County | — | — |
| Kona Roofing Experts | Kona Roofing Experts | — | (808) 300-5564 | Other roofers | Kailua-Kona · Hawaii County | — | — |
| Kona Vacation Rentals | Kona Vacation Rentals | — | (808) 334-1199 | Property managers | Kailua-Kona · Hawaii County | — | — |
| Koolau Builders INC | Koolau Builders INC | info@koolaubuilders.com | (808) 349-4539 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Kprs Hawaii Construction | Kprs Hawaii Construction | — | (808) 739-9399 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Kr Landscaping Kauai | Kr Landscaping Kauai | — | (808) 634-7530 | Tree | Kapaʻa · Kauai County | — | — |
| Krekow Jennings INC | Krekow Jennings INC | info@krekowjennings.com | (206) 625-0505 | GC, remodel, ADU | Honolulu · Honolulu County | — | — |
| Kt Protection Services | Kt Protection Services | — | (808) 201-1911 | Alarm and generators | Honolulu · Honolulu County | — | — |
| Kukui Home Inspection | Kukui Home Inspection | — | (808) 868-6154 | Inspectors | Kihei · Maui County | — | — |
| Kukui It | Kukui It | — | (808) 822-0080 | Alarm and generators | Lihue · Kauai County | — | — |
| Kula Glass Company INC | Kula Glass Company INC | admin@kulaglass.com | (808) 242-8999 | Windows, patio, painters | Wailuku · Maui County | — | — |
| Kung Fu Air Service LLC | Kung Fu Air Service LLC | kungfuairservicellc@gmail.com | (808) 501-7354 | HVAC | Honolulu · Honolulu County | — | — |
| Kupaa Electric LLC | Kupaa Electric LLC | — | (808) 756-5257 | Electricians | Kailua-Kona · Hawaii County | — | — |
| Kw Air Conditioning LLC | Kw Air Conditioning LLC | — | (808) 347-3136 | HVAC | Honolulu · Honolulu County | — | — |
| L K Takamori INC | L K Takamori INC | keenantakamori@hawaii.rr.com | (808) 847-8423 | GC, remodel, ADU | Pearl City · Honolulu County | — | — |
| Lahaina Roofing LLC | Lahaina Roofing LLC | — | (808) 793-9195 | Other roofers | Lahaina · Maui County | — | — |
| Lambert Electric LLC | Lambert Electric LLC | — | (808) 419-8467 | Electricians | Lahaina · Maui County | — | — |
| Lanaki Pest Control | Lanaki Pest Control | lanakipestcontrol@yahoo.com | (808) 640-7130 | Pest, tile roofs | Waikoloa Village · Hawaii County | — | — |
| Lance Higa Painting INC | Lance Higa Painting INC | lance@lancehigapainting.com | — | Windows, patio, painters | Honolulu · Honolulu County | — | — |
| Landmark Builders INC | Landmark Builders INC | lbisales@landmark-builders.com | (970) 330-8855 | GC, remodel, ADU | Haleiwa · Honolulu County | — | — |
| Landry Construction | Landry Construction | — | (808) 495-5120 | GC, remodel, ADU | Kahului · Maui County | — | — |
| Lava Roofing | Lava Roofing | contact@lavaroofing.com | (808) 793-6635 | Other roofers | Kona · Hawaii County | — | — |
| Lava Roofing Kona | Lava Roofing Kona | — | (808) 746-2314 | Other roofers | Kailua-Kona · Hawaii County | — | — |
| Lava Roofing Lahaina | Lava Roofing Lahaina | — | (808) 793-5520 | Other roofers | Lahaina · Maui County | — | — |
| Layton Construction | Layton Construction | — | (808) 245-8680 | GC, remodel, ADU | Lihue · Kauai County | — | — |
| Leakmaster Roofing | Leakmaster Roofing | — | (808) 591-1900 | Other roofers | Honolulu · Honolulu County | — | — |