Best Roofing Contractors in Ajax, ON

15 companies listed · 7 in Ajax · 2 open 24/7 · 11 open weekends · 14 rated 4.5+

Data verified October 21, 2026

Metro Roofing

Metro Roofing

4.7 39 reviews
“Cool, my roofing job was done with the utmost care and attention to detail!”
Free estimates1,700+ projects completed40+ yearsServes Ajax, Scarborough +8Family-ownedLocally owned
785 Westney Rd S
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Norris Roofing

Norris Roofing

5.0 48 reviews
“It was great having to deal with one company that could do it all and at a very reasonable cost.”
146 Taunton Rd E
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Durham Region Roofing Ltd.

Durham Region Roofing Ltd.

4.9 34 reviews
“They arrived on time, protected our property and brought a large crew to complete the work.”
Free estimatesServes Ajax, Durham Region
27 Thorncroft Crescent
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Eastern Eavestroughing

Eastern Eavestroughing

4.6 21 reviews
“We had our Fascia and eaves replaced , Issac was very professional and covered everything perfect from start to finish .”
Free estimates40+ yearsServes Durham Region, GTAFamily-ownedOpen 24 hours
855 Westney Rd S #1
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Mr General Contractors & Renovations Durham

Mr General Contractors & Renovations Durham

5.0 6 reviews
“They were efficient, attentive to details, and made the entire process smooth and stress-free.”
Free consultation24/7 emergency serviceServes Ajax, Durham Region
48 Tulloch Dr
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Prgc

Prgc

5.0 1 review
“We can't say enough about how great the service was from Ryan & his team at Priceless Roofing & General Contracting!”
Free estimatesInsured10-yr warrantyIIS-certifiedSince 2005Serves Greater Toronto Area
27 Pembry Dr
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Listed for homeowners in and around Ajax, ON, these 15 companies take roofing work. What each one claims about tear-offs, membranes and workmanship cover is taken from its own website; ratings and quoted lines come from public reviews.

Area overview: Ajax, ON

7 of the 15 companies we list are based in Ajax; the other 8 serve Ajax from Oshawa (16 km), Markham (18 km) and Whitby (8 km). The companies on this page are rated from 4.3 to 5.0 across 1,205 reviews; 9 have 50 or more reviews and 14 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (93%), quality (85%) and responsiveness (84%). The topics that come up most in reviews of the companies on this page are "estimates", "price" and "cleanliness". 2 are open around the clock; 11 are open on Saturdays and 10 on Sundays. Domain records put 6 websites of the companies on this page at ten or more years old; the oldest dates from 2001. 2 offer emergency call-outs; 2 offer financing or payment plans; 13 give free estimates; 6 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 15 of the companies on this page; 14 publish a contact page and 10 list a public email. 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.

Why are some of these roofers based elsewhere?

An address in Ajax itself is given by 7 of the 15 companies; the others cover the area from within 20 km. Travel is normal in this trade. Ask how far out they come in winter, when a leak call and a snowy drive do not mix.

Unic Sheet Metal & Eavestroughing

Unic Sheet Metal & Eavestroughing

4.6 3 reviews
“Once i placed my order the install was completed within the time frame quoted.”
Free estimates5-yr warranty45+ yearsServes Greater Toronto area, Durham RegionFamily-owned
759 Kingston Rd W
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Wilson's Roofing

Wilson's Roofing

5.0 50 reviews
“They are fabulous down to every detail, politeness, professional, personable and so on...”
30,000+ customers servedSince 1954Serves Durham RegionFree consultationBBB accreditedOpen 24 hours
Oshawa, ON · 16 km from Ajax
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Logik Roofing & Insulation Oshawa

Logik Roofing & Insulation Oshawa

4.9 50 reviews
“The office Staff of this company (Danielle in particular), for me, was competent, professional, and above all friendly to deal with.”
Free estimatesInsured & bonded10-yr warranty100% satisfaction guarantee17+ yearsServes Oshawa
Oshawa, ON · 16 km from Ajax
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Over the Top

Over the Top

4.8 49 reviews
“My roof was completed today and I am so very pleased with the finished product!!”
Free estimatesInsured15+ yearsServes Oshawa, Whitby +2
Oshawa, ON · 16 km from Ajax
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Colin's Roofing & Eavestrough

Colin's Roofing & Eavestrough

4.8 48 reviews
“I Called Colin later in the evening, late enough that I wasn't expecting a response till morning, Colin responded within minutes , I had an emergency and without hesitation he fit me in next day .”
Free estimatesInsuredServes Durham Region
Oshawa, ON · 16 km from Ajax
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Edmunds Home Improvements

Edmunds Home Improvements

4.3 43 reviews
“After the 5 day long install (as promised) Tommy left me some extra siding, trims and a few off-cuts so I can do a paint colour match for some from railings, fascia and pillars.”
Free estimatesInsured up to $5M10-yr warrantyFinancing available20,000+ projects completedServes Toronto, Scarborough +7
Markham, ON · 18 km from Ajax
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Ck Roofing Solutions

Ck Roofing Solutions

5.0 50 reviews
“There was a minor issue one year later and they can back earlier than promised and addressed it.”
Free estimatesInsured10-yr warrantySince 2007Serves Richmond Hill, Markham, Greater Toronto Area
Markham, ON · 18 km from Ajax
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Dryhome Roofing

Dryhome Roofing

4.5 46 reviews
“Jordan from Dryhome came out same day and tarped my roof for me until I can get it replaced by them in the spring.”
Free estimatesWarranty on all workServes Oshawa, Whitby +3Family-owned
Oshawa, ON · 16 km from Ajax
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C.D. Roofing & Construction Ltd.

C.D. Roofing & Construction Ltd.

4.6 47 reviews
“Ryan T guided me through the process and provided suggestions that were essential in making the decisions that worked best for the project.”
Free estimatesInsured up to $5M10-yr warrantySince 1994Serves Ajax, Bowmanville +15
Whitby, ON · 8 km from Ajax
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Why these companies made our list

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