Replacing windows
New windows for a Mississauga home, townhouse or condo
Replacing windows here starts with the rules, then the product. A house or freehold townhouse needs no City permit for same-size windows. A condo suite or condo townhouse needs the board’s approval first. A house in either heritage village has a district plan to follow. And sometimes new glass in the old frame is enough. We connect you with independent local installers who measure, quote and replace windows; the contract is between you and the installer.
- Rules first, then the window
- Straight answers on when glass alone will do
- Quotes you can compare line by line
Repair or replace
When replacement beats repair (and when a glass swap will do)
New windows are a large job. Before you commit, check which of these describes yours.
A glass swap will do
The frame and sash are sound, and one or a few units have fogged or cracked. A new sealed unit clears it, usually for less than a new window.
A repair will do
The window works badly but the frame is fine: a stripped crank, a dropped sash, a draft at the weatherstrip. Those are hardware repairs.
Replacement makes sense
The frame is soft, split or leaking around the edges, several windows are failing at once, or parts are no longer made. That’s when a new window is the better spend.
Two methods
Retrofit insert or full-frame: two ways to replace
Ask each installer which method they propose for each window, and why.
Most frame types, including vinyl windows, are made in both versions, and so are styles such as casement windows.
Retrofit (insert)
The old sash and glass come out, and a new window is set inside the existing frame. Trim and walls usually stay. It suits sound, square frames, though the glass area shrinks slightly.
Full-frame
Everything comes out, down to the rough opening, the framed hole in the wall. The installer can check for water damage, fix the sill, and insulate and seal the gap. It suits rotted or out-of-square frames.
Permits
Permits in Mississauga: same size vs bigger or new openings
The City of Mississauga says replacing a window or door with one of the same size doesn’t need a building permit. Adding a new window, or making an existing opening bigger, does. Zoning rules still apply even when no permit is needed. Confirm on the City page before work starts, since rules can change.
Same size, same opening
No City building permit. That covers most retrofit and full-frame jobs where the rough opening stays as it is.
Bigger or new opening
A building permit is needed, for example to enlarge a basement window for a bedroom. See basement and egress windows.
Condo or heritage property
Even a same-size swap may need the board’s approval or a heritage clearance. Those are separate from the City permit, and they come first.
ENERGY STAR
ENERGY STAR in Canada: one national standard, no zones
Older advice talks about ENERGY STAR climate zones. Those were retired. The current ENERGY STAR Canada specification sets one threshold for the whole country, so a certified window here meets the same bar as one anywhere else in Canada.
Look for the certification on the label or the product listing, and ask the installer for each model’s rating. A certified window is also what the Ontario rebate asks for. Treat energy claims as believable when they rest on that certification, not on a sales sheet.
Ontario rebate
The Ontario Home Renovation Savings rebate: what qualifies
Ontario’s window rebate is the Home Renovation Savings Program, delivered by Enbridge Gas and Save on Energy. It pays a set amount per rough opening for ENERGY STAR certified windows and doors.
Windows and doors generally sit in the program’s path that includes a home energy assessment and more than one upgrade, so read how the assessment works before the installer starts. Glass-only work, such as a new sealed unit, doesn’t qualify. There is no general federal grant for windows at present. Rules and amounts change, so check the program page before you sign.
What affects the quote
What moves the price of a window replacement project
Two quotes for the same house can look very different. These are the usual reasons:
- Retrofit insert or full-frame, and what turns up once the old frame is out
- The number of windows, their sizes and styles, and any bays, bows or custom shapes
- Frame material and the glass in each unit, including double or triple
- Exterior finish: capping, trim, caulking, and matching a colour a condo board has set
- Access: upper floors, openings in brick, or a suite that needs the service elevator
- Permit work for any enlarged opening, and removal of the old windows
List the windows by room with rough sizes, and add a photo of each style. Quotes can only be compared when they describe the same windows and the same method.
Approvals
Condos, condo townhouses and heritage districts: approvals first
Condo suites
Windows are usually common elements. The corporation replaces them, often across the whole building, and the board sets colour, style and grille pattern. An owner who wants a change needs board approval first and usually a registered agreement. See the condo window and balcony door guide.
Condo townhouses
The same rules usually apply, even though the home looks like a freehold house. Check your declaration or ask the management office before you collect quotes.
Meadowvale Village and Old Port Credit Village
Both district plans ask owners to keep original wood windows where they can. Replacement may not be the expected route; repair and wood storms often are. Read the heritage villages guide before you plan anything.
Before you sign
Your contract: estimates, cooling-off and HST in Ontario
Under Ontario’s consumer protection rules, a contract you sign at home comes with a cooling-off period during which you can cancel, and a written estimate limits how far the bill can rise without your agreement. Windows aren’t covered by the door-to-door sales ban, so the cooling-off period is your protection. Quotes in Ontario add HST; check that each one shows it.
Comparing two quotes
Line them up on the same points: the method for each window, the certified model and glass, exterior trim and caulking, permits, removal of the old windows, warranty on the product and the installation, and HST. If one quote is much lower, find the line it leaves out.
Questions
Questions about replacing windows
Explore your options
Before you choose new windows
Installers replace windows across the city, from wartime houses and postwar bungalows to 1970s semis and newer townhouses, including Applewood, Malton, Erin Mills and Churchill Meadows.
List the windows you want replaced
Name the rooms, give rough sizes, and say whether it’s a house, a condo townhouse or a suite. We’ll pass it to an independent local installer, who will measure and quote. Ask them, too, whether a new sealed unit would do for any of the windows.