| Business | Phone |
| Jacques & Raynald Morin 230 6e Av, Montmagny G5V 3Y7 | (418) 248-0937 |
| Martin Mercier Inc 130 Rue De La Riv Du S, Montmagny G5V 3S7 | (418) 248-2300 |
| Construction Andre Deschenes 698 Boul Tache O, Montmagny G5V 3R8 | (418) 248-0309 |
| Construction Yvon Morin Inc 116 Rue Samuel-Caron, Montmagny G5V 4R4 | (418) 248-1088 |
| Constructions Montmagny Inc 68 Rue Du Palais-De-Justice, Montmagny G5V 1P5 | (418) 248-3722 |
| Constructions Jean Lemieux 354 Ch Du Coteau, Montmagny G5V 3R8 | (418) 248-1562 |
| Coulombe Aa Inc 241 Boul Tache O, Montmagny G5V 3R8 | (418) 248-1358 |
| Excavation Leandre Chabot Inc 329 Boul Tache E, Montmagny G5V 1C7 | (418) 248-1866 |