Skip to content
FeaturedConcrete & Masonry Contractors in Newmarket, Ontario

Calder Contracting

Top Spot in Newmarket Today 5.00 (35 reviews)(905) 751-3831

Calder Contracting

Calder Contracting is a Newmarket roofing and renovation company founded by owner James Calderwood, who reports more than 10 years in the trades. Its roofing work spans shingle repairs, full replacements, leak detection and ventilation improvements. It also works on eavestroughs, siding and home renovations across York Region and the GTA.

Calder Contracting photo 1
Calder Contracting photo 2
Calder Contracting photo 3
Calder Contracting photo 4
Calder Contracting photo 5
Calder Contracting photo 6
Calder Contracting photo 7
Calder Contracting photo 8
Show all 8 photos
Business Highlights
  • The company says it is insured, WSIB-covered and licensed to work across Ontario.
  • It says it provides a workmanship guarantee on every job.
Service Area

Newmarket, Aurora, East Gwillimbury, Bradford, Richmond Hill, Vaughan, Markham, Toronto and other GTA communities.

Featured Local Business

Calder Contracting is one of 12 concrete & masonry contractors ProsGrade lists in Newmarket, Ontario.

Featured
Featured on ProsGrade
Listing details

4 services listed, including Roof repair and replacement, Asphalt and metal roofing and Eavestroughs and ventilation. Open weekdays, closed on weekends. Rated 5.0 from 35 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Calder Contracting compares with the other 11 concrete & masonry contractors on ProsGrade in Newmarket, using public Google ratings and review counts.

  • Ranks in the top quarter of the 12 Newmarket concrete & masonry contractors on ProsGrade by Google rating and review volume.
  • Rated 5.0 on Google, at or above the 4.9 average of other Newmarket concrete & masonry contractors on ProsGrade.
  • Has more Google reviews (35) than 9 of the 11 other Newmarket concrete & masonry contractors on ProsGrade.
  • One of 7 Newmarket concrete & masonry contractors on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

4 services
  • Roof repair and replacementInspections, shingle repair, leak detection, full tear-offs and re-roofing.
  • Asphalt and metal roofingInstalls asphalt, architectural shingles and metal roofing.
  • Eavestroughs and ventilationGutter guards, eavestroughs, soffit and fascia, plus roof ventilation improvements.
  • Home renovationsKitchen, bathroom and basement remodelling and additions.

Reviews

What customers say

Recent customers praise the crew’s punctuality, clear communication and tidy work, and describe the process as straightforward and the work as planned. One customer says James’s crew came out the next day to patch a roof leak before the scheduled job began; another appreciated being fitted in quickly when a leak made the work time-sensitive.

Customer Reviews

Shahrzad T

James did an excellent job fixing my roof. Communication was great from start to finish, and he was very punctual. The work was done properly and efficiently, and I’m very happy with the results. I would definitely recommend him and will call him again in the future.
View full reviewShow less

Caleb Blachar

We recently had Calder Contracting complete a full roof replacement on our home in Newmarket and we’re extremely happy with the results. James was knowledgeable, responsive, and made the whole process stress-free. The crew worked hard, the materials looked high quality, and everything was cleaned up perfectly after the job was done. I’d highly recommend Calder Contracting to anyone looking for dependable roofing services in Newmarket.
View full reviewShow less

Simon Koop

It’s obvious Calder Contracting takes pride in the work they do. Everything was finished as we planned, on schedule, and with great attention to detail. James helped make the process simple and stress-free. Definitely one of the best contractors we’ve dealt with in Newmarket!
View full reviewShow less

Tim Tvaradze

Great experience from start to finish. The team was professional, showed up on time, and clearly explained what needed to be done without trying to upsell anything unnecessary. The work was completed quickly and the quality looks solid—no mess left behind either. Pricing was fair compared to other quotes I got. Would definitely recommend if you’re looking for reliable roofing work.
View full reviewShow less

Muthu A

James Calder and his team did a great job with the LED light installation in my house. They were professional, on time, clean, and thorough. They made sure everything was fully installed, tested, and working before they left. Very happy with the quality of work and would gladly recommend them.
View full reviewShow less

Marc C

James and his team were very accommodating and quick to fit me in as there was a leak in my roof and it was a time sensitive matter. They did an excellent job and I am very satisfied with their service.

Mohsen Azizi

I’m very happy with the work James and his team did cleaning the gutters around our home. They were professional and on time. Alen from the team was very polite and friendly. I highly recommend this company.??

C & G Chang Sue

Great experience with Calder Contracting. They reinstalled my eavestrough quickly and at a fair price. The team was friendly and the workmanship is top-notch. Will definitely give them a call for future projects.

Faith Zigelstein

From start to finish James made the whole process very quick and easy. We were getting our roof done and before the job was supposed to start, our roof started leaking. I contacted James and his crew came out the next day to patch the leak before the job started. He is reliable and his pricing is reasonable. We will definitely be calling Calder Contracting for our future renovations.
View full reviewShow less

Write a Review

Share your experience with this business. Reviews are moderated before they appear publicly.

We'll email you a link to confirm your review. It's only sent in once you click it.

Frequently Asked Questions

How long can a roof replacement take?

The company gives a typical range of two to five days for residential roof replacements in Newmarket, depending on size and weather.

Does Calder respond to roof leaks?

Yes. It offers emergency repairs for active leaks and storm damage in Newmarket, Aurora and the GTA.

What happens before work starts?

The company describes a property consultation followed by a clear, itemized quote.

Does it offer a workmanship guarantee?

The company says it provides a workmanship guarantee on every job.