MRC de Roussillon · Candiac to Saint-Constant
Window and door replacement in Candiac, Delson, Sainte-Catherine and Saint-Constant
New windows and doors for homes in Candiac, Delson, Sainte-Catherine and Saint-Constant. We measure every opening at your home, then you get a written quote you can hand to your city with the permit request.
- ★ 4.5 · 484 Google reviews
- RBQ licensed
- Free in-home estimate
- Canadian-made, ENERGY STAR-certified windows
- Installed by our own crews
- Rénoclimat paperwork done with you, up to $300 per eligible window
★★★★★“Excellent customer service and flawless install. Windows came out amazing.”Marco S., Google review, September 2026
Get your free in-home estimate
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- ★ 4.5 · 484 Google reviews
- RBQ 5735-2130-01
- Free written quote
- 9,200+projects across Greater Montréal
- 35+years installing windows and doors
- 4.5★average Google rating
- RBQlicensed contractor 5735-2130-01
What the homes of the Roussillon towns need
These four towns grew at different times, so their windows are different ages. Here is what the public record says, and what it means for your replacement.
Candiac: a planned town, with its biggest growth after 2001
Candiac was founded in 1957 as a planned town. Its population grew from 12,675 in 2001 to 19,876 in 2011, the fastest decade it has had. Many homes there are now two or three decades old. If your windows date from that time, ask us to check the seals and the glass at the estimate.
Sainte-Catherine: much of its growth came in the 1990s
Sainte-Catherine grew from 9,805 residents in 1991 to 15,953 in 2001, then slowed. That makes many of its homes about 25 to 35 years old. Windows from that period are at the age where a replacement often makes sense. This is also the town where the permit takes the longest, so start the paperwork early.
Delson: a small, dense city with a railway past
Delson became a village in 1918 and a city in 1957. Its name joins Del and Hudson, after the Delaware and Hudson Railway that ends there. It holds 8,328 people on about 8 square kilometres, so lots are small and your neighbours see your facade. A clean install matters more here.
Saint-Constant: older streets and newer ones
Saint-Constant publishes a guide for heritage and quality renovation, and it has its own PIIA bylaw. If your home is in an older part of town, check with the city before you choose colour and style. For newer streets, a like-for-like window in your existing opening is the simple path.
Do I need a permit to replace windows and doors in my town?
Each town sets its own rules, and the waiting times are very different. We read each city page on 12 November 2026. Where a page does not name windows, we say so.
Candiac: yes, a permit or certificate
The city’s page says a permit or certificate is required to add or replace doors and windows. It says to count a few days for the city to issue it. You can ask online or call the planning department at 450 444-6050. Page: Candiac permits and certificates.
Sainte-Catherine: yes, and plan at least 30 business days
The city lists renovation, including replacing exterior doors and windows, as work that needs a permit. It says processing takes at least 30 business days after all documents are in, and longer in summer. If your home is in a PIIA zone, door and window colours are among the criteria. Page: Sainte-Catherine permits.
Delson: a permit or certificate in most cases
Delson says a permit or certificate is needed in most cases and that the planning department has 45 days to review a request. A PIIA review can add 6 to 8 weeks. You apply online. The page does not name windows, so call 450 632-1050, extension 3315, to confirm your project. Page: Delson permits and certificates.
Saint-Constant: most renovation work needs a permit
The city says most construction and renovation work needs a permit and that you send plans and documents before work starts. Minor work can be requested online. The page does not name windows, so call the planning department at 450 638-2010, extension 7410. Page: Saint-Constant permits for construction and renovation.
WindowsuPVC and hybrid, triple-pane, double Low-E glass
Front entry doorsSteel or fiberglass, with decorative glass options
Patio doorsSliding and stackable patio doors
Garage doorsInsulated garage doors, installed with the restHow we serve the Roussillon towns
Sainte-Catherine
Sainte-Catherine is the closest of the four: 24 km from our Saint-Laurent showroom, about 27 minutes without traffic. Because its permit takes the longest, this is the town where we ask you to file first and order second.
Delson and Saint-Constant
Both are 28 km away, about 30 and 31 minutes. They sit side by side, so we often plan estimates for both on the same day. Saint-Constant homeowners in an older sector should read the city’s heritage guide before they pick a colour.
Candiac
Candiac is 31 km away, about 32 minutes. Its page gives the shortest wait of the four that state one: a few days. A Candiac project can often go from estimate to install date faster. La Prairie and Châteauguay each have their own page, linked below.
Directions from your town
Driving distance from the Saint-Laurent showroom to each town centre, without traffic (OpenStreetMap, November 2026).
- Sainte-Catherine24 km · 27 minDirections
- Delson28 km · 30 minDirections
- Saint-Constant28 km · 31 minDirections
- Candiac31 km · 32 minDirections
How your project runs
- Free in-home estimate
An estimator measures every opening and checks the frames.
- Written quote
Products, finishes and installation work, confirmed in writing.
- Installation by our crews
Our own installers do the work, covered by the 25-year transferable warranty.
- Rénoclimat
We prepare the paperwork with you, up to $150 per eligible opening.
“Excellent customer service and flawless install. Windows came out amazing.”
Marco S., Google review, September 2026
Questions from Roussillon homeowners
Do you work in Candiac, Delson, Sainte-Catherine and Saint-Constant?
Yes. Pick your town in the form and we book the in-home estimate. For La Prairie and Châteauguay, we have separate pages.
Which town has the slowest permit?
Sainte-Catherine, according to its own page: at least 30 business days after all documents are in. Delson’s department has 45 days to review a request. Candiac says a few days. Saint-Constant does not give a time on the page.
Should I order before I get the permit?
No. File the permit request first, with the opening sizes from our written quote. We can give you those sizes after the estimate.
How far is your showroom from my town?
From 1190 Rue Bégin in Saint-Laurent: Sainte-Catherine 24 km, Delson and Saint-Constant 28 km, Candiac 31 km, all 27 to 32 minutes without traffic. The estimate itself happens at your home.
Can Rénoclimat help pay for new windows?
Yes, if your home qualifies. For files opened since October 1, 2026, Québec’s Rénoclimat program lists up to $300 per ENERGY STAR window, with a cap of $4,500 for a house and $6,000 for a plex. Doors are not on that list. Your ÉnerGuide rating must improve, so book the energy evaluation first. Details: Québec.ca, Rénoclimat.
Book your free estimate in the Roussillon towns
We measure at your home and send a written quote.
Sources
- Ville de Candiac, Certificats et permis
- Ville de Sainte-Catherine, Permis
- Ville de Delson, Permis et certificats
- Ville de Saint-Constant, Permis pour travaux de construction et de rénovation
- Ville de Saint-Constant, Patrimoine et rénovation
- Québec.ca, Rénoclimat: nouveautés (amounts since October 1, 2026)
- Wikipédia, Candiac
- Wikipédia, Delson
- Wikipédia, Sainte-Catherine (Québec)
- OpenStreetMap Nominatim and OSRM