About Grant Marion Construction
Grant-Marion Construction has built in Cornwall and the surrounding area since 1971, with over 50 years of craftsmanship across custom homes and residential, commercial, industrial and institutional projects. Its Design-Build service is led by a civil engineer and designers and offers a one-stop contract, constructability analysis, expert advice on bonding requirements and single-window monthly invoicing. It can build on land the client owns or on a lot they plan to buy, and it lists properties in Cornwall and SDG neighbourhoods, including a waterfront lot on the St. Lawrence at County Road 2 in Summerstown and a lot near the Cornwall Golf and Country Club. All of its homes include a Tarion Home Warranty. Past commercial clients include schools, medical centres and dental offices. Rated 4.6 from 20 Google reviews, 16 of them five stars.
Services and details
Builds custom homes
YesDesign and build under one roof
YesBuilds on your lot
YesSells homes in its own communities
YesCottages and waterfront homes
YesStates Tarion registration or an HCRA licence
Yes
No information yet on teardown and infill rebuilds, luxury and estate homes, energy-efficient or Net Zero builds, timber frame or log homes, modular or prefab homes, also renovates and builds additions, handles permits and approvals, home builders' association member. The website did not say; call and ask.
Contact
- (613) 938-8004
- 2747 Marleau Ave, Cornwall, ON K6H 7B6
- Website
- View on Google Maps
Hours
- Monday
- 8AM-5PM
- Tuesday
- 8AM-5PM
- Wednesday
- 8AM-5PM
- Thursday
- 8AM-5PM
- Friday
- 8AM-5PM
- Saturday
- Closed
- Sunday
- Closed
Listing compiled from public sources on 2026-10-19. Report a correction or request removal. Back to custom home builders in Cornwall.