Buildingbybri Handyman & Tree Services
“I strongly recommend that anyone that needs help with repairs around the home, contact them first!”
Best Deck Builders in Ajax, ON
15 companies listed · 4 in Ajax · 10 open weekends · 12 rated 4.5+
Data verified October 21, 2026
Lakes Landscapes
“He is very knowledgeable in the various aspects of landscaping required to add the nice ambience that most of us want in our yards or patios.”
Mr General Contractors & Renovations Durham
“They connected me with a reliable general contractor who was great and got the job done for a great price.”
Inline Landscaping Inc.
Gray's Deck & Fence
“Gray's Deck & Fence did a fantastic job building my front porch and the price was reasonable.”
DAP Fence & Deck Inc.
“They replaced the fence that runs along the back of our property, and replaced our gate and we couldn't be happier with the results.”
Listed for homeowners in and around Ajax, ON, these 15 companies build and repair decks, where footing depth and snow are part of every design. Listings reflect what each company publishes itself, and the ratings and comments are taken from public reviews.
Area overview: Ajax, ON
4 of the 15 companies we list are based in Ajax; the other 11 serve Ajax from towns including Markham (18 km), Oshawa (16 km) and Pickering (5 km). The companies on this page are rated from 3.0 to 5.0 across 586 reviews; 4 have 50 or more reviews and 12 are rated 4.5 or higher. The topics that come up most in reviews of the companies on this page are "estimates", "quality" and "price". 10 are open on Saturdays and 5 on Sundays. 5 have ten or more years of experience, the longest 28 years. 8 give free estimates and 2 are family- or locally-owned. We have a website on file for all 15 of the companies on this page; 13 publish a contact page; 12 list a public email and 2 take bookings online. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
What should I look for on a deck builder's site?
All 15 deck builders on this page list a website. The pages worth reading are the ones showing framing and footings rather than furniture on finished boards. Photos of piles going in or a flashed ledger say more about the build than any gallery of summer evenings.
Golden Valley Decks
“Ryan offered us suggestions on maximizing the space of deck with great design, and answer every single of our questions.”
Aztec Decks
“Super good job building our deck, expected a good deck but instead we ended up with a great deck.”
Ontario Fence & Deck Limited
“The company had done beautiful work for 35+years and is BBB accredited with an A+ rating which are the main reasons why I chose them”
Decksrus
“Our final product looks fantastic, and they delivered on time and on budget.”
QPS Landscape & Pool Professionals
“They created a true backyard oasis that we will enjoy for years to come!”
Serenity Decks
“Richard and Allysyn took the time to educate us on the different decking options available and worked with our budget.”
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Cornerstone Construction
“Great attention to detail, got exactly what I wanted, Mike was easy to deal with and very knowledgeable, he explained the process and why it had to be done the way it was.”
Noble Renovation
“They have done 2 bathrooms for us and they turned out fantastic.”
Affordable Deck and Fence
“Not only is the your project going to look amazing beyond your expectation, you will feel like you didn't pay them enough for all the hard work.”
Why these companies made our list
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