Warehouse Guys
“We did extensive homework before the buy and found that Warehouse Guys had the best product and price”
Best General Contractors in London, ON
24 companies listed · all 24 in London · 3 open 24/7 · 10 open weekends · all 24 rated 4.5+
Data verified November 10, 2026
First General London/Middlesex
“Special thanks to Adam and Saif (?) for their attention to detail while working on the basement.”
1st Choice Home Solutions
“From meeting with Steve at the shop, at home review and design ideas, through to the finish of the work.”
Green Metal Roofing and Manufacturing Inc.
“They only had two guys working on installing so it took a little longer than I thought it would, but I'm guessing that was how they were able to be so flexible with our changing availability.”
Riverside Construction
“The maintained regular communication through the project and were readily available to answer questions.”
ABA Construction
“The team went above and beyond what we requested on our job, huge thanks to DJ for great communication throughout.”
Listed for homeowners in and around London, 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: London, ON
All 24 companies we list here are in London itself. We have 121 companies in London on file; this page shows the highest-rated 24. The companies on this page are rated from 4.5 to 5.0 across 1,783 reviews; 12 have 50 or more reviews. The topics that come up most in reviews of the companies on this page are "communication", "estimates" and "quality". 3 are open around the clock; 10 are open on Saturdays and 4 on Sundays. The services the companies on this page list most often on their websites are commercial services (2), doors (2), landscaping (2), renovations (2) and windows (2). Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 2000. 4 offer emergency call-outs; 4 offer financing or payment plans; 8 give free estimates; 5 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 24 of the companies on this page; 19 publish a contact page; 20 list a public email and 3 take bookings online. 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 8 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.
Power House Construction
“I had the team rip out an ancient basement bathroom, and install something modern.”
Davinci Contractors Group Inc. (2012)
“They completed the work in a great timely manner and they did an outstanding job with the finishing.”
DLS Electric (London) Inc.
“From Amy in the office to the team that did the work (Al, Olivia and Alex), everyone was friendly, listened to what we needed and then worked hard to get it done for us in record time.”
Nature's Image Landscaping
“Steve and the crew did a great job on fixing up my backyard pond.”
Coronation Construction
“I can't say enough great things, and if you're looking for a Construction Company in London, Ontario you should pretty much only go with Coronation Construction.”
Tri-Dys Construction Inc.
“Over the last year, TRY-DYS Construction Inc has completed six projects for us, ranging from fencing to two complete apartment renovations.”
Ashworth Drainage
“From the estimate until completion it has been an excellent experience dealing with Ashworth Drainage.”
Evergreen Design + Build
“The project finished EXACTLY on time (impressive) since they build a bit of a time buffer into the schedule (so they won't be fastest contractor either, but the schedule worked with our requirements).”
Royal Oak Homes
“More recently, we needed a major renovation due to water damage, and we couldn't imagine anyone better suited to handle such a significant project.”
Forest City Renovations
“If you're looking for a trustworthy company for bathroom renovations or kitchen renovations in London, Ontario, we highly recommend Forest City Renovations”
Viridity Incorporated
“We connected with Josh from Viridity Inc in December, and right from the get go we were impressed with his communication and responsiveness”
True North General Contractors Inc
“Excellent attention to detail throughout the building of our new garage, the project was completed on schedule and on budget!”
Augustine Construction
“Augustine Construction has provided me with a great backyard space - new deck, gazebo, walkway and garden shed.”
Friesen Renovations
“Will never work with another construction company again after working with Friesen renovations, Noah was super great to work with and definitely will be back for more projects in the future!”
Skylar Group Ltd
“Reliable, quick, and job done properly...”
Pro Home Contracting Inc.
“We hired Pro Home to manage a renovation that involved several different trades, and they handled the entire project exceptionally well.”
SWO General Contracting
“The crew, Mark, Gabe, Dan and the other trades all did amazing work and what we really liked was their great personalities and easy to talk to.”
Duo Building Ltd
“Their communication was very good during the entire process and they kept the work site very clean throughout the entire reno.”
Why these companies made our list
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