Danar Co. GTA
“They were careful with the work and made sure there was a minimum of disruption and worked very hard on some hot days.”
Best Retaining Wall Contractors in Thornhill, ON
24 companies listed · 5 in Thornhill · 2 open 24/7 · 18 open weekends · 23 rated 4.5+
Data verified October 18, 2026
Arcon Landscape Construction Ltd
“They also built a wall for flower beds along our whole backyard and some other grading and repair work.”
Cedar Hill Paving Ltd
“Cedar Hill just finished another project for me, they have always installed quality, good customer service.”
Greenfield Landscaping and Lawn Care
“At the end of each day they cleaned up and put unused materials away neatly for the next day's use.”
Game
“They have extensive experience with both general and premium segment facilities that meet high quality standards in terms of innovation, advanced trends and technologies.”
Delta Classic Homes Inc
“They explained what they felt was needed after initial consultation and what extra expenses could be anticipated without attempting to promote any deluxe packages but nevertheless were very focused on craftsmanship.”
Listed for homeowners in and around Thornhill, ON, these 24 companies build and rebuild retaining walls. Wall types, materials and seasonal hours are what each company publishes for itself, and the ratings and quoted lines are drawn from public reviews.
Area overview: Thornhill, ON
5 of the 24 companies we list are based in Thornhill; the other 19 serve Thornhill from towns including Concord, Etobicoke and Toronto. The companies on this page are rated from 4.2 to 5.0 across 2,164 reviews; 18 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), quality (89%) and responsiveness (77%). The topics that come up most in reviews of the companies on this page are "price", "communication" and "estimates". 2 are open around the clock; 17 are open on Saturdays and 11 on Sundays. The services the companies on this page list most often on their websites are retaining walls (4), brick repair (2), concrete (2), flagstone (2) and interlocking (2). 5 show a licence on their websites. Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 2003. 3 offer emergency call-outs; 1 offers financing or payment plans; 18 give free estimates; 4 are family- or locally-owned and 2 list coupons or special offers. 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 these companies show photos of finished walls?
A website link sits on all 24 wall builders here. A photograph of a finished wall tells you very little, because everything that fails is behind the face. Look for pictures taken mid-build instead: the base trench, the drainage stone going in, the grid rolled out between courses. Ask to see a wall that has been standing through several winters.
VIP Paving & Interlocking Contractors Toronto
“This is a respectable company who does business with integrity and the end result is beautiful.”
West York Paving Ltd
“They arrive with equipment that you would only see on very large industrial jobs, not what you would expect for a single car driveway.”
Drobot Construction
“Once the work was done all pavers, river rock and gardening accessories were put back.”
Luke's Landscaping
“Passing strangers have commented on how great the lawn looks.”
Canadian Concrete Leveling
“Thanks for a quality job in Newmarket with an impressive amount of lift to restore the proper slope to walkways adjacent to our foundation.”
Aquatech Basement Waterproofing Toronto
“I requested to have a longer pipe (pause) installed for the discharge and they had no problem coming back to do it.”
Buildstrong Masonry
“René was great in communications - very thorough in explaining the scope of work and was willing to work out a fair price.”
4ever Green Landscaping Services Ltd
“They did a really good job cutting the grass, trimming the edges and cleaning up.”
Red Robin Masonry
“Red Robin was awarded the Stone and Brick work for a 5200sqf new construction project and they did not disappoint.”
Just Sealing Vaughan
“What stood out for me was timeliness, follow ups, sharing expert advice, and politeness with which they dealt with my project and me.”
Concrete Master
“About one month ago ConcreteMaster replaced our lead water pipe that connects to the City's water pipe under our front lawn.”
SVD Restoration
“Good work done fully satisfied…amazing people”
Aurora Interlock & Pools Inc.
“And the entire crew working at my house was excellent - they were all friendly, professional, and exhibited pride in their work.”
GTA Landscaping Vaughan
“GTA LANDSCAPING came out to measure up and provided a detailed quote to re-sod our front lawn.”
Novapave Construction Inc.
“Ronny was excellent in doing the assessment of the job for a reasonable quote.”
Wilkens Contracting Inc.
“I would recommend working with this family business as I am totally satisfied with thier work and would for sure use them again if needed.”
Cactus Landscaping & Construction
“Vladimir came up with this beautiful design for the walkway/retaining walls, again, exceeding expectations for it.”
Alasya Construction
“We have been very happy with the work that Alasya Construction has been providing as a stucco contractor.”
Why these companies made our list
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