| Business | Phone |
| C & D Construction Inc 1334 Valley Dr, Rock Valley 51247 | (712) 476-2871 |
| Quality B Inc 819 18th Ave Se, Rock Valley 51247 | (712) 476-2222 |
| Sandbulte Construction 3635 Garfield Ave, Rock Valley 51247 | (712) 722-2607 |
| West Rock Construction 1995 350th St, Rock Valley 51247 | (712) 982-2007 |