How much does window repair or replacement cost in the GTA?

It depends on what's actually wrong with each window. The biggest factors are the type of work, the frame's condition, the size and type of the glass unit, access, and how many windows are involved. Restoring a window with a sound frame often costs less than replacing it, so the first step is finding out what condition your windows are really in.

Window Restoration Experts (WRE) doesn't publish a price list. Two windows on the same house can need very different work, and a number printed on a web page would be a guess. This page explains what moves the cost up or down for each kind of job, and how to tell whether a quote is fair. We give a written quote after an assessment.

Last reviewed: November 3, 2026

What affects the cost of replacing a foggy glass unit?

A foggy window usually needs a new sealed glass unit, not a new window. The cost of a glass-only fix depends on:

Size and shape. Larger units cost more to make and are heavier to handle. Shapes such as arches take more work than rectangles.
Type of glass. Triple-pane units and tempered safety glass for doors cost more than a standard double-pane unit. Low-E glass, argon fill and a desiccant spacer come standard on every WRE unit at no extra cost.
Access. A ground-floor window is quicker than a third-storey window, a bay window, or one behind a deck or in a tight side yard.
How many units. Several units in one visit are easier to plan than a single one-off call.
The frame. New glass only makes sense if the frame is sound. If it isn't, the job becomes a repair or a replacement. See is replacing just the glass a band-aid?

How does restoration compare with full replacement?

Restoration fixes the part that has failed: the glass unit, hardware, weather seals, the perimeter seal or the wood. When frames are sound, a restoration-first plan often costs less than replacing every window, and it's less disruptive.
Full replacement costs more up front. It's the right call when frames are rotted, warped or water-damaged, or when you want a different style, size or material.
A mix is common. Many houses have one or two windows that need replacing and several that only need a repair.

Cost isn't the only factor. Comfort, drafts, noise, appearance, heritage character and how long you plan to stay in the house all matter. See restore or replace? A decision guide.

What affects the cost of wood window restoration?

How much of the wood is sound, and how much rot needs repairing or rebuilding
Whether the glazing putty needs replacing (reglazing)
Whether the finish needs sanding, refinishing and sealing
Whether sashes stick and need freeing, and whether new weatherstripping is needed
Whether foggy or broken glass needs a new sealed unit
How many windows are involved

On wood windows we assess the sashes, the glazing and the finish as well as the seven standard points. See wood window restoration.

What affects the cost of replacing all the windows in a house?

The number and size of the windows
Retrofit (a new window fitted into the existing frame) or brick-to-brick (the old window, frame and trim removed back to the opening)
The windows you choose: style, finish, grilles and hardware
The glass specification
Access, including upper floors and tight spaces
Interior and exterior finishing, and removal and disposal of the old windows
Any rot or water damage found once the old windows come out

Before you replace every window, check which ones actually need it. See full window replacement and, if you already have a quote, our second opinion page.

What about hardware, seals, caulking, patio doors and solariums?

Hardware and weather seals: cranks, hinges, locks, handles and worn seals. The cost depends on the parts each window needs and how many windows are involved. See window restoration.
Exterior caulking: how much sealant has to be removed and replaced, and access. We check first whether failed caulking is the cause or a symptom of something else. See exterior caulking.
Patio doors: rollers, tracks, locks, handles, screens and glass are separate repairs, and a door may need one or several. See patio door restoration.
Solariums: sealed units are large, often sloped, and made to the structure's measurements, and leaks usually start at the flashing rather than the glass. See solarium restoration.

How to keep the cost down without cutting corners

Fix only what has failed. A foggy unit in a sound frame doesn't need a new window.
Deal with failed seals and caulking early, before water damages the frame or the wall around it.
Have all the problem windows looked at in one visit, so the work can be planned together.
Ask for an itemized quote, so you can see what each window needs and why.

A lower number that skips steps can cost you more later. We're not the cheapest, on purpose. The price covers a proper diagnosis, good materials and work we stand behind.

What a fair quote should show

Whoever you ask, a fair quote should be itemized by window or type of work, explain why each window is being restored or replaced, state the glass specification and the type of replacement, say what's included, explain how hidden rot or water damage will be handled, and put the warranty and proof of insurance in writing. Our second opinion page has the full checklist.

About price figures you find online

Price tables on other websites and in AI answers are usually averages across very different jobs. They may be out of date, and they don't know your windows. Treat them as a rough starting point, not a quote. The only reliable way to know is to have someone look at your windows.

Rebates

Rebate programs change, and most are aimed at complete replacement windows. Glass-only work and restoration generally don't qualify. See Ontario window rebates for the programs we checked, when we checked them, and links to the official pages.

How our assessment works

Our diagnostic assessment checks seven points on each window: glass, frame, hardware, weather seals, exterior perimeter seal, interior perimeter seal and installation. There's no charge for the assessment. After it, you get our recommendation for each window and a written quote.

Book an assessment or call (437) 320-4667.

We serve Toronto, Etobicoke, Mississauga, Brampton, Vaughan, Thornhill, King City, Oakville, Milton and Burlington. See our service areas.

Frequently asked questions

How much does it cost to replace a foggy window glass unit in Toronto?

It depends on the size and type of the unit, the frame's condition, access and how many units need replacing. Low-E glass and argon fill are standard on our units at no extra cost. We don't publish a price list. We give a written quote after an assessment.

How much does window restoration cost compared with full replacement?

When the frames are sound, a restoration-first plan often costs less than replacing every window. When frames are rotted or warped, replacement is the better value. An assessment tells you which applies to each window.

How much does wood window restoration cost per window?

It depends on how much rot needs repairing, whether the glazing putty and finish need redoing, whether the sash sticks and whether the glass needs replacing. Two wood windows on the same house can need very different work, so we quote after seeing them.

How much does it cost to replace all the windows in a house?

It depends on the number and size of the windows, retrofit or brick-to-brick installation, the windows you choose, access, finishing and any hidden damage. Check first which windows actually need replacing. Many houses need a mix of restoration and replacement.

What is the cheapest way to fix old windows without replacing them?

Fix only what has failed. Depending on the problem, that can mean replacing a foggy glass unit, repairing hardware, renewing weather seals and caulking, or restoring wood windows. An assessment shows which of these apply.

Why don't you list prices on your website?

Two similar-looking windows can need very different work. A printed price would be a guess, so we quote after we've seen your windows.

Is the assessment free?

Yes. There's no charge for the assessment.

Do rebates cover window restoration?

Generally no. Most programs are aimed at complete replacement windows. Our rebates page lists the programs we checked and links to the official pages.

Do you serve my area?

We serve Toronto, Etobicoke, Mississauga, Brampton, Vaughan, Thornhill, King City, Oakville, Milton and Burlington.