Windows & Doors Cost Calculator | Optima Windows & Doors
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Planning a window or door replacement? Get an instant price estimate in a few clicks. Simply enter your project details below.
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How Much Does Window Replacement Cost in Ontario?
Window replacement cost in Ontario typically ranges from $400 to $1,100 per window installed, depending on style, size, frame material, and glass package. For a full home of 10 to 14 windows, most GTA homeowners spend between $7,000 and $18,000 including professional installation. Door replacement adds $900 to $3,500 per unit depending on the style.
Below you will find a complete breakdown of what drives window installation cost in Ontario, a style-by-style pricing table, information on available rebates, and answers to the questions we hear most often. All prices reflect 2025 installed costs in the Greater Toronto Area.
Buying Multiple Windows Saves Money
Replacing all windows in one visit typically lowers the per-unit cost by 10 to 20% compared to replacing individual windows over several years. Our installers only need to mobilize once, and economies of scale apply to glass ordering. If your windows are aging, a full-home project almost always delivers better value than a piecemeal approach.
Window Replacement Cost by Style — Ontario 2025
The style of window you choose is the single biggest factor in new windows cost. Here is what installed pricing looks like across the most common window types we install throughout Toronto, Mississauga, Oakville, Burlington, Newmarket, Pickering, and surrounding areas.
| Window Style | Installed Cost Range | Best For | Notes |
|---|---|---|---|
| Casement Window | $500 – $1,100 | Living rooms, kitchens | Most Popular |
| Double-Hung Window | $400 – $900 | Bedrooms, older homes | Best Value |
| Slider / Horizontal Sliding | $350 – $800 | Basements, wide openings | Easy operation, low maintenance |
| Picture / Fixed Window | $300 – $750 | Views, high-light areas | No opening, most energy efficient |
| Awning Window | $450 – $1,000 | Bathrooms, above doors | Opens outward, great ventilation |
| Bay Window | $2,000 – $5,000 | Living rooms, dining rooms | Premium |
| Bow Window | $2,500 – $6,000 | Curved facades, statement walls | Premium |
| Triple Pane Upgrade | +$150 – $400 / window | All styles | Energy Upgrade |
| ENERGY STAR Certified | Included in above pricing | All styles | Rebate Eligible |
Prices reflect installed cost including labour and disposal of old windows. Exact pricing depends on your home's opening sizes, existing frame condition, and selected glass package.
Door Replacement Cost in Ontario
Replacing your front door or patio door is one of the highest-return upgrades you can make to your home. Door replacement cost in Ontario ranges from under $1,000 for a straightforward steel entry door to over $4,000 for a custom fibreglass door with sidelights and a transom.
| Door Type | Installed Cost Range | Notes |
|---|---|---|
| Steel Entry Door | $900 – $1,800 | Durable, excellent security, paintable — compare steel vs. fibreglass |
| Fibreglass Entry Door | $1,200 – $2,800 | Most Popular Low maintenance, wood-grain finish available |
| Entry Door with Sidelights | $1,800 – $4,000 | Full surround frame included, major curb appeal upgrade |
| Patio / Sliding Door | $1,200 – $3,500 | Double or triple pane glass available — sliding door guide |
| French Door (double) | $2,000 – $4,500 | Premium Interior or exterior application |
What Affects Your Window Installation Cost?
Two homes with the same number of windows can have very different replacement costs. These are the main variables that move the price up or down.
Window Style & Size
Larger openings and more complex styles like bay or bow windows require more materials and more installation time. A picture window costs far less than a casement of the same size.
Frame Material
Vinyl is the most cost-effective and lowest-maintenance option. Fibreglass frames offer superior thermal performance at a premium. Wood-clad interiors are available at the highest price point.
Glass Package
Double pane with low-e coating and argon fill is the standard. Triple pane adds roughly $150 to $400 per window and delivers measurably better insulation in Ontario winters. Obscure or decorative glass adds cost as well.
Number of Windows
Replacing more windows at once lowers the per-unit cost. A single-window replacement carries a higher unit price than a full-home project because setup, disposal, and travel costs are spread across more units.
Installation Complexity
Second-floor windows, structural issues with the rough opening, and rotted or damaged framing can all add to labour time. We assess all of this during your free in-home measurement at no charge.
Trim & Finishing
Interior and exterior trim, caulking, and brickmould are all included in Optima's installed pricing. Some suppliers quote supply-only or exclude finishing, so always compare on a fully-installed basis.
Window Rebates & Financing in Ontario
The cost to replace windows in Ontario can be meaningfully reduced through government rebate programs and financing. Here are the main options available to homeowners in 2025.
Canada Greener Homes Grant
Federal rebates for eligible window and door upgrades meeting EnerGuide thermal performance thresholds. Requires a pre- and post-retrofit EnerGuide evaluation. Optima's ENERGY STAR certified products meet the requirements. Full rebate guide →
Canada Greener Homes Loan
Interest-free financing for qualifying energy efficiency upgrades, including windows and doors. Can be combined with grant funding. Apply through Natural Resources Canada after completing your pre-retrofit audit.
Utility Provider Incentives
Some Ontario utility providers offer additional cash-back incentives for ENERGY STAR certified window installations. Eligibility and amounts vary by provider and change periodically. Ask us during your quote.
Optima Financing Options
We offer flexible payment plans so you can move ahead without waiting to save the full amount. Financing is available on approved credit and can be structured to match your budget and project timeline.
Frequently Asked Questions
These are the questions Ontario homeowners ask us most when researching window and door replacement cost.
Window replacement cost in Ontario typically ranges from $400 to $1,100 per window installed, depending on the style, size, and glass package. A full home replacement covering 10 to 14 windows generally falls between $7,000 and $18,000 installed. Casement and double-hung windows sit at the more affordable end; bay and bow windows are at the premium end due to their size and framing complexity.
The main factors are window style (casement, double-hung, bay, bow), frame material (vinyl, fibreglass, or wood-clad), glass package (double vs. triple pane, low-e coatings, argon fill), opening size, how many windows are being replaced at once, and any installation complexity such as second-floor access or damaged framing. Replacing more windows in a single project lowers the per-unit price.
Front door replacement cost in Ontario ranges from $900 to $2,800 installed for a standard entry door. A steel door is the most affordable option. A fibreglass door with decorative glass panels or sidelights costs more but adds significant curb appeal and energy performance. Patio or sliding door replacement typically costs $1,200 to $3,500 installed.
Yes. Ontario homeowners may qualify for rebates through the Canada Greener Homes Grant (up to $5,600 for qualifying windows and doors) and an interest-free loan of up to $10,000. Some utility providers also offer additional incentives. Products must meet EnerGuide thermal performance standards. Optima carries ENERGY STAR certified products and can advise on rebate eligibility at your free quote appointment. Learn more →
Triple pane windows add approximately $150 to $400 per window over double pane. In Ontario's climate the upgrade typically pays for itself through reduced heating costs within 6 to 10 years. Triple pane also delivers noticeably better noise reduction and a significant reduction in condensation on the glass during cold weather. Full triple pane vs. double pane comparison →
A full home window replacement typically takes one to two days on site. Windows are custom-manufactured to the exact dimensions of your openings, so the lead time from order to installation is usually 4 to 8 weeks. Optima will give you a firm installation date at the time of your contract. For most projects, your home is fully weather-tight the same day installation is complete.
In most Ontario municipalities, replacing windows of the same size and style in the same opening does not require a permit. However, enlarging or relocating an opening, or making structural changes to the surrounding wall, typically does require a building permit. Your Optima consultant will clarify permit requirements for your specific project during the initial visit.
The most common signs are: visible condensation between the panes (failed seals), drafts around the frame when closed, difficulty opening or locking the window, rotted or warped framing, and noticeably higher heating or cooling bills. Windows over 20 years old in Ontario's climate are typically past their optimal performance window and may be costing more in energy bills each year than a full replacement would.
Further Reading
Explore our guides and comparisons to help you make the best decision for your home.
Get an Accurate Quote for Your Home
Our in-home measurements are free, no-pressure, and include a full written quote. We serve Toronto, Mississauga, Oakville, Burlington, Newmarket, Pickering, Whitby, Richmond Hill, and all surrounding GTA communities.
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