| Business | Phone |
| Aultman Construction Co Inc 6799 Overseas Hwy # 1, Marathon 33050 | (305) 743-5984 |
| B & L Beneway Inc 1865 Overseas Hwy, Marathon 33050 | (305) 743-4394 |
| Botsford Builders 937 107th Street Gulf, Marathon 33050 | (305) 743-9644 |
| Charles Miller Construction 11257 5th Avenue Gulf, Marathon 33050 | (305) 289-0005 |
| Coral Construction Co 7932 Tuna Dr, Marathon 33050 | (305) 743-5225 |
| D'Asign Source & Co Inc 11500 Overseas Hwy, Marathon 33050 | (305) 743-7130 |
| Grill Construction Inc 204 Nautilis St, Marathon 33050 | (305) 743-4405 |
| Jeff Ryder Construction Inc 5409 Overseas Hwy # 323, Marathon 33050 | (305) 289-8331 |
| Keys Constructors Inc 10701 6th Avenue Gulf, Marathon 33050 | (305) 743-5438 |
| R L Grant Construction Inc 246 W Seaview Cir, Marathon 33050 | (305) 664-0680 |
| Seamark Construction Co 930 80th St, Marathon 33050 | (305) 743-4767 |
| Sunrise Construction Of-Keys 10704 4th Avenue Gulf, Marathon 33050 | (305) 289-8883 |