Black double steel entry door with a transom and two wall lanterns on a cut-stone façade

Westmount · Summit Park to Greene Avenue

Window and door replacement in Westmount, built to the City’s heritage rules

Westmount has its own rules for windows and doors. We measure each opening at your home, show you models that fit those rules, and give you a written quote. 9,200+ projects across Greater Montréal, 35+ years.

  • ★ 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

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Four quick steps. No pressure, no obligation.

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Certifications: Window Wise certified dealer, SAWDAC, ENERGY STAR, CSA, 25-year transferable warranty

  • 9,200+projects across Greater Montréal
  • 35+years installing windows and doors
  • 4.5★average Google rating
  • RBQlicensed contractor 5735-2130-01

What a Westmount home asks of its windows and doors

Westmount has 8,590 occupied homes. Houses (detached, semi-detached and row) are 42.1% of them. Another 20.8% are in duplexes or buildings under five storeys, and 37.0% are in buildings of five storeys or more (2021 census, City of Montréal profile). That mix decides how a job runs.

Stone and brick walls set the size of the opening

The City’s own guideline says the pattern of openings in a masonry wall is vital to the façade. A replacement should fit exactly inside the existing opening. It should match the original in type of operation, proportions, divisions and depth of inset. We measure the opening in the wall, not only the old frame.

Row houses and semi-detached homes share one look

The City asks that windows and doors facing the street look the same across a whole row or semi-detached pair. Your window is judged next to your neighbour’s. Before you order, look at what the other half of your building already has.

Front doors with glass are part of the house

On older Westmount homes, a front door with a glazed panel and a transom is a defining feature. The guideline says to keep it or replace it with a match. Our entry-door range includes steel, fiberglass and wrought iron doors with decorative glass, so there is a model to compare against your door.

Condos and larger buildings need the co-owners first

More than a third of Westmount homes sit in buildings of five storeys or more. For a condo, the City asks for a letter from the co-owners’ association that authorizes the change. Get your board’s answer before the estimate, so the quote matches what the building allows.

What does the City of Westmount ask before you replace windows or doors?

Westmount issues its own permits. They come from the Permits and Inspections Division of the Urban Planning Department. The points below come from the City’s windows and doors page and its Directive 4.

Exterior work goes to City Council

In general, a project that changes the outside of a property falls under By-law 1305 on site planning and architectural integration, and City Council must approve it. Restoring original parts and identical replacement are excluded. Read the City’s windows and doors page first, then call the Urban Planning Department before you order.

The documents the City asks for

A letter that describes the work. A quote or work order from the window maker, with an illustrated data sheet and a numbered list that matches your photos. Colour photos of every façade, close enough to show the condition. An official cost quote before taxes. For a condo, the co-owners’ letter. If the design changes, add shop drawings and scaled elevations. If an opening gets wider, add a lintel detail stamped by a structural engineer.

Your building’s category sets the material

Directive 4 says PVC windows are not acceptable on category I* and category I buildings. PVC and metal are generally not acceptable on category II. On category II, some PVC or metal variations that are true to the original may be considered. Category III replacements must suit the style of the house. Check your category on the City’s historical value page before you pick a material.

Details the directive calls out

Sliding windows are generally not acceptable where the old windows define the building’s character. Clip-in grids are not acceptable. Tinted glass does not suit homes and mirrored glass is not acceptable anywhere. Metallic frame colours should be avoided. Wood must be painted or stained an opaque colour.

What we replace in Westmount homes

How we serve Westmount

Victoria Village

About 10 km and 15 minutes from our Saint-Laurent showroom, without traffic. It is our closest stop in Westmount, so a measuring visit fits easily into one trip.

Upper Westmount and Summit Park

12 km and about 17 minutes away. On the slope near Summit Park, bring your building’s category to the estimate. It decides whether we price PVC, hybrid PVC and aluminium, or wood.

Westmount Park and Greene Avenue

12 to 15 km and 17 to 18 minutes away. Along Greene Avenue, many homes share walls or sit in apartment buildings. Ask the board about the rules before we measure.

Westmount is 10 to 15 km from our showroom

We drive from 1190 Rue Bégin in Saint-Laurent. Distances are measured on OpenStreetMap roads, rounded, with no traffic.

Black double entry doors with an arched top, sidelights and decorative glass, set in a stone surround. A front door with glass is the kind of detail Westmount's guidelines ask owners to keep.
Black double entry doors with an arched top, sidelights and decorative glass, set in a stone surround. A front door with glass is the kind of detail Westmount’s guidelines ask owners to keep.

How your project runs

  1. Free in-home estimate

    An estimator measures every opening and checks the frames.

  2. Written quote

    Products, finishes and installation work, confirmed in writing.

  3. Installation by our crews

    Our own installers do the work, covered by the 25-year transferable warranty.

  4. Rénoclimat

    We prepare the paperwork with you, up to $150 per eligible opening.

4.5★★★★★484 Google reviews

“Excellent customer service and flawless install. Windows came out amazing.”

Marco S., Google review, September 2026

Questions Westmount owners ask

Do I need a permit to replace windows or doors in Westmount?

In general, yes. Work that changes the exterior is reviewed under By-law 1305 and approved by City Council. Restoration of original parts and identical replacement are excluded from that process. Permits come from the Permits and Inspections Division. Call them before you order, because the answer depends on your building.

Can I put PVC windows on my Westmount house?

It depends on the category the City gives your building. PVC is not acceptable on category I* and I. It is generally not acceptable on category II. Category III needs a design that suits the house. We also offer wooden windows and hybrid PVC and aluminium windows, so the right product depends on your category.

What documents should I bring to the City?

A letter that describes the work, photos of every façade, the window maker’s data sheet and an official cost quote. For a condo, add the co-owners’ letter. Our written quote comes after the in-home estimate, and it is one of those documents.

Does Westmount allow sliding windows or tinted glass?

For windows that define the character of the building, sliding windows are generally not acceptable. Tinted glass is not appropriate on homes, and mirrored glass is not acceptable on any building. We compare your existing windows to the options at the estimate, before you spend anything.

Is there a government grant for new windows in Westmount?

Quebec’s Rénoclimat program pays up to $300 per window. The cap is $4,500 for a house and $6,000 for a duplex, a triplex or a multi-unit residential building. It applies to new files since October 1, 2026, and program conditions apply. Check quebec.ca for the current rules.

Book your free in-home estimate in Westmount

We measure at your home and send a written quote.

Get my free quote(514) 387-0001
Sources
  1. City of Westmount, Windows and Doors (permits, By-law 1305, documents, categories). Read through the Internet Archive copy of 2026-01-07 because westmount.org refused connections from our network on 2026-11-12
  2. City of Westmount, By-law 1305 on SPAIP (linked from the City’s page; not read in full)
  3. City of Westmount, Renovating and Building in Westmount, Directive 4 Windows and Doors (revised 2004)
  4. City of Westmount, Character areas (historical value of your property)
  5. Ville de Montréal, Profils des ménages et des logements 2021, Agglomération de Montréal (census 2021 custom data)
  6. Gouvernement du Québec, Rénoclimat: new measures since October 1, 2026 (page updated 2026-10-13)