| Construction Gératek Ltée. | 1840-6165-64 | Estrie | Active |
| Construction Germain St-Martin inc. | 1505-5767-66 | Lanaudière | Active |
| Construction Ghislain Gravel inc. | 8339-7356-17 | Mauricie | Active |
| Construction Ghislain Lavallée Inc. | 8346-2259-53 | Montérégie | Active |
| Construction Ghislain Trachy Inc. | 2641-6255-17 | Chaudière-Appalaches | Active |
| Construction Gilbert Nolet Inc. | 8286-6138-11 | Chaudière-Appalaches | Active |
| Construction Gildas Poulin Inc. | 2744-9883-94 | Lanaudière | Active |
| Construction Gilles Arsenault Inc. | 2955-9879-69 | Montérégie | Active |
| Construction Gilles Poulin 84 Ltée | 8100-9409-48 | Laval | Active |
| Construction Gino Montpellier Inc. | 8279-1559-25 | Montérégie | Active |
| Construction GM Martial Gélinas Inc. | 5641-3081-01 | Mauricie | Active |
| Construction GMS Enrg | 3119-0564-10 | Lanaudière | Active |
| Construction Godin & Limoges inc. | 5586-5927-01 | Laurentides | Active |
| Construction Gohier inc. | 8293-9042-05 | | Active |
| Construction Groupe Prévost inc. | 8320-7175-36 | Estrie | Active |
| Construction Guillaume Barbeau Inc. | 8342-8888-30 | Montérégie | Active |
| Construction Guillaume Groulx inc. | 8347-7307-05 | Laurentides | Active |
| Construction Guillaume Létourneau Inc. | 8347-7133-51 | Chaudière-Appalaches | Active |
| Construction Guy Fagnant inc. | 8350-8358-49 | Montérégie | Active |
| Construction Guy Mireault inc. | 2329-8748-48 | Lanaudière | Active |
| Construction Guy Ricard inc. | 2642-4796-88 | Mauricie | Active |
| Construction Gyber Inc. | 2646-3414-61 | Montérégie | Active |
| Construction H & H inc. | 2972-9712-67 | Chaudière-Appalaches | Active |
| Construction H. Grandmont Inc. | 8320-4370-49 | Centre-du-Québec | Active |
| Construction H.M.B. Inc. | 5606-3217-01 | Montérégie | Active |
| Construction H.T. & Fils Inc. | 8292-0638-19 | Laurentides | Active |
| Construction Hackett & Hackett Inc. | 2827-7796-78 | Montréal | Active |
| Construction Ham Inc. | 8353-1921-57 | Lanaudière | Active |
| Construction Hamelin & Lalande inc. | 5687-7046-01 | Laurentides | Active |
| Construction Harold Curadeau inc. | 8324-9599-28 | Gaspésie--Îles-de-la-Madeleine | Active |
| Construction Hatley & Associés Inc. | 5750-8079-01 | Estrie | Active |
| Construction Haute Gamme inc. | 5605-6526-01 | Lanaudière | Active |
| Construction Henrique Inc. | 8344-0511-44 | Montérégie | Active |
| Construction Herman Paradis inc. | 8349-4856-37 | Chaudière-Appalaches | Active |
| Construction Hogue inc. | 8356-2223-51 | Laurentides | Active |
| Construction Hydro métropolitain inc. | 5629-9548-01 | Montréal | Active |
| Construction I D Marcotte Inc. | 8320-7449-46 | Outaouais | Active |
| Construction Idéal De Granby inc. | 2533-9573-30 | Estrie | Active |
| Construction ILMM/aluminium | 8111-1916-54 | Laval | Active |
| Construction Immo-Val inc. | 5761-0826-01 | Montréal | Active |
| Construction Immoplex inc. | 2961-7008-90 | Laval | Active |
| Construction Inesar inc. | 8308-7056-16 | Montréal | Active |
| Construction Injection E.D.M. inc. | 2248-3028-72 | Capitale-Nationale | Active |
| Construction Innu Meskanau S.E.C. | 5709-3650-01 | Côte-Nord | Active |
| Construction Instalation A.L. | 8221-8397-35 | Chaudière-Appalaches | Active |
| Construction Intégral MT Inc. | 8002-5646-01 | Outaouais | Active |
| Construction Inverness inc. | 5795-7003-01 | Estrie | Active |
| Construction J & L Gendron inc. | 8278-4760-40 | Montérégie | Active |
| Construction J. Garceau Et Fils inc. | 2847-6455-13 | Mauricie | Active |
| Construction J. Lapointe et fils Inc. | 2951-9881-80 | Laurentides | Active |