Winmar Property Restoration Specialists
“Winmar promptly did an inspection, offered us an extremely reasonable estimate, and did an incredible job restoring our bathroom.”
Best General Contractors in Thunder Bay, ON
24 companies listed · all 24 in Thunder Bay · 1 open 24/7 · 7 open weekends · 19 rated 4.5+
Data verified October 21, 2026
Groundhogs ️
“On sight staff were polite, efficient and respectful of the rest of the property.”
Til-Ka Construction Inc.
“Despite having issues with the siding they managed to get more in and finish the job before winter really set in.”
SRL Contracting Corp.
“They handled everything from ground prep and concrete finishing all the way through construction and roofing.”
Chaschuk Enterprises Ltd
“From the lady I spoke with who suggested I get the driveway mix, glad I did, to the delivery driver who arrived promptly and was very courteous.”
Aj's Contracting & Rentals
“Excellent service, I hired them for a renovation project, this project had a very tight deadline for completion, they finished the job early and on budget, very happy with the workmanship, will definitely hire them again.”
Listed for homeowners in and around Thunder Bay, ON, these 24 companies take on multi-trade work, from a basement build-out to a full renovation. What each one says about licensing, hours and the work it takes on comes from its own website; ratings and quotes come from public reviews.
Area overview: Thunder Bay, ON
All 24 companies we list here are in Thunder Bay itself. We have 34 companies in Thunder Bay on file; this page shows the highest-rated 24. The companies on this page are rated from 4.0 to 5.0 across 246 reviews; 19 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (97%), quality (97%) and responsiveness (84%). The topics that come up most in reviews of the companies on this page are "crew", "estimates" and "price". 1 is open around the clock; 7 are open on Saturdays and 3 on Sundays. The services the companies on this page list most often on their websites are doors (2), siding (2) and windows (2). 1 shows a licence on its website and 1 lists staff certifications (HAAG and IICRC). Domain records put 4 websites of the companies on this page at ten or more years old; the oldest dates from 1998. 1 offers emergency call-outs; 9 give free estimates and 4 are family- or locally-owned. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Do any of these companies quote without charging?
The free estimate promises less on a multi-trade job, and it is advertised by 9 of the 24 companies here. Free normally buys a walk-through and a ballpark figure. A real price takes measuring, trade pricing and desk time, so design-build firms often charge for that stage and credit it against the work if you sign.
Elements North Roofing & Exterior Solutions
“These men were not only very professional but also extremely courteous and friendly and hard workers”
Northwest Fencing
“Not only does my new fence enhance the overall aesthetic of my property, but it also provides the security and privacy I was looking for.”
The Shed Guy Ltd.
“Scott and his crew were easy to deal with and the product is exactly how he outlined it would be.”
Gridlink
“Great to work with, good crew and management.”
JFT Contracting
“They came and assessed the area we wanted paved, gave us a great quote and we scheduled them to come back and pave.”
NST Contracting
“Best curbs/sidewalks in town, the guys seem to all be on the same page and that's always “getter done””
R&C Renovations
“Roy did an excellent job helping me with my new flooring.”
All Trades Contracting
Bay City Contractors (Thunder Bay) Inc
Bayview Renovations & Contracting
“Excellent work with great attention to detail.”
North West Industries Inc.
“You need something metallically done then these are the guys to do it.”
Makkinga Construction Inc
“Everything from the initial very detailed quote to completion of His work was a wonderful experience.”
Taranis Contracting Group Ltd.
“I was very please this the service and the driver was great!”
RML Contracting Ltd
“Hardest working crew around 👍🏼 …”
Thunder Bay Renovations
“The nursery is complete with the shelving unit, the baby gate is fantastic and the toddler railing gives us piece of mind.”
Nordex Contracting Inc.
“The quality of work, the timeliness, the pricing, the cleanup and the friendly crews that did the work.”
Point Grey Design & Build
DRD Construction Services
Why these companies made our list
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