Window Replacement Service in GTA – Energy-Efficient Windows You Can Count On

We are your go-to contractors for reliable window replacement services in the GTA. With years of hands-on experience, skilled installers, and a focus on comfort, energy efficiency, and style, we help homeowners upgrade their homes with custom-fit, durable windows that withstand Ontario’s harsh climate perfectly.

Best Window Company in the GTA – Reliable Services & Energy-Efficient Windows

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Up to 30% OFF on Your Window Installation

Don’t Pay for 90 Days

Take advantage of our 90-day credit policy with no added interest charges

Low Payments

Monthly plans designed to lower down your financial spend.

Warranty

Peace-of-mind with our extended warranty.

Upgrade Your Home with Quality Window Replacement in the GTA

We provide professional-grade window replacement across the Greater Toronto Area, using Energy Star® certified products, Low-E coated glass, and fusion-welded vinyl frames for long-lasting performance. Our installations eliminate air leakage, reduce thermal bridging, and maximize R-value, helping you cut energy bills and increase property value. 

Unlike generic contractors, we custom-build each window to fit your home’s exact dimensions, climate needs, and style. Trusted by GTA homeowners for durability, precision, and results.

Single-hung window with colonial grilles and planter box on a heritage-style home in Toronto, paired with a black entry door for enhanced curb appeal.

Comprehensive Window Replacement Solutions for Every GTA Home

Residential Window Replacement

We replace outdated residential windows with high-performance vinyl systems built for GTA’s climate. Our energy-efficient units feature Low-E glass, argon-filled chambers, and multi-point locking hardware for insulation, security, and comfort. Each window is custom-fitted to eliminate air infiltration and meet Ontario Building Code standards. No shortcuts, just reliable installs by certified professionals.

Basement Window Replacement

Our basement window replacements use PVC frames, double-pane sealed glass, and thermal-insulated jambs to improve moisture control, ventilation, and safety. We build to exact egress code specs, ensuring compliance and durability. With rust-proof hardware, anti-draft seals, and tailored sizing, our windows perform in GTA’s wettest conditions, far superior to mass-produced alternatives.

Window Glass Replacement

We replace fogged, cracked, or broken glass with high-efficiency sealed units featuring Low-E coatings, warm-edge spacers, and argon or krypton gas infills. Our precise measuring ensures a perfect retrofit into your existing frame. Save on heating and cooling costs without full-frame replacement. Ideal for GTA homes looking to restore performance and clarity without unnecessary spending.

Custom Window Designs

We engineer custom windows in any style, bay, bow, casement, or slider, with options for frame colour, grille pattern, glass type, and hardware finish. Built with precision-milled vinyl or composite materials, our units meet structural load ratings and energy efficiency requirements for Ontario homes. Designed, manufactured, and installed locally for a perfect fit and long-term reliability.

Window Styles That Work for the Unique GTA Climate

A white vinyl awning window hinged at the top, featuring a single glass pane that opens outward from the bottom.

Awning Windows

Awning windows open outward from the top, allowing ventilation during rain while blocking moisture. Built with compression seals and Low-E glass, they’re perfect for GTA’s wet seasons. Ideal for bathrooms and kitchens with limited wall space.

A white vinyl casement window with a single clear glass panel, hinged on one side and opened outward like a door.

Casement Windows

Casement windows swing open with a crank and seal tightly when closed. Their side-hinged design resists air and water infiltration, making them energy-efficient in harsh GTA winters. Great for bedrooms, living areas, and high-wind zones.

A white single-hung window featuring a lower sash that tilts inward for easy cleaning, paired with a fixed upper sash and clear glass panels for a modern, functional design.

Single Hung Windows

Single hung windows feature a fixed top sash and a vertically sliding bottom sash. With insulated glass and weatherstripping, they offer durability and airflow. A budget-friendly, space-saving option for GTA homes with traditional layouts.

A modern white vinyl window featuring two sashes that tilt inward for easy cleaning and maintenance, with clear glass panels and a minimalist frame design.

Double Hung Windows

Both sashes slide for improved airflow and easy cleaning from inside. With dual-pane glass and tight compression seals, these windows enhance ventilation and thermal control, making them ideal for bedrooms and home offices across the GTA.

A modern white vinyl sliding window featuring two clear glass panels, one fixed and one operable, designed for smooth horizontal opening and closing.

Single Slider Windows

Single slider windows glide horizontally and come with one fixed pane and one operable sash. Featuring Low-E glass and foam-filled frames, they’re great for tight spaces like kitchens or basements while ensuring energy savings year-round.

A white sliding window with two clear glass panels, including an operable right-side panel and an open track section on both sides, designed for smooth horizontal movement and modern ventilation.

Double Slider Windows

Double sliders open from both sides, offering maximum ventilation and ease of use. With thermal glass, argon gas infills, and reinforced vinyl frames, these are ideal for large window openings in family rooms or rear-facing GTA homes.

A white-framed bay window featuring a large fixed center panel and two operable casement windows on either side, angled outward for added dimension and natural light.

Bay Windows

Bay windows extend outward with a fixed centre pane and two operable sides. Designed for enhanced light, space, and ventilation, they feature multi-pane glass and fusion-welded frames to maintain energy efficiency in the GTA’s fluctuating climate.

A white-framed bow window consisting of five vertical panels, with the outer two panels designed as operable casement windows and the center three as fixed panes, gently curved to extend outward from the wall.

Bow Windows

Bow windows consist of four or more glass panels in a curved layout. Popular in GTA homes for natural light and panoramic views, they’re built with insulated vinyl frames and Low-E glass for strong thermal performance and stylish curb appeal.

A double-pane sliding window featuring a symmetrical square grid grille design with horizontal and vertical muntin bars, creating a modern and stylish look.

Energy Efficient Windows Replacement

Tailored Window Solutions for Every Room in Your GTA Home

Brighten your living room with bay, bow, or large picture windows. These styles invite natural light, improve insulation, and enhance aesthetics. Choose from custom frame colours, grid patterns, and energy-efficient glass to boost comfort and curb appeal.

Kitchens need ventilation and easy function. Awning or single slider windows provide airflow while resisting grease and moisture. With Low-E coatings and vinyl frames, they perform well near sinks or stoves, handling GTA humidity and heat changes.

Casement and double-hung windows offer bedroom comfort, quiet, and privacy. Their insulated glass and tight seals block outdoor noise and maintain indoor temperatures, supporting restful sleep. Add obscure glass or screens for added protection.

Humidity, privacy, and airflow matter here. Awning windows with frosted or textured glass let in light without compromising privacy. Built with water-resistant frames and tight weather seals, they’re perfect for high-moisture GTA bathrooms.

Boost productivity with casement or picture windows that reduce noise and increase natural light. With energy-efficient glazing and tight-seal frames, your workspace stays quiet and climate-controlled, ideal for GTA’s busy neighbourhoods.

Basement windows need to meet the Ontario egress code and resist moisture. We install hopper or single slider styles with sealed units and rust-proof frames. They improve air circulation, security, and natural light in below-grade GTA spaces.

How Replacing Your Windows Benefits Your GTA Home

Energy Efficiency

Our replacement windows use Low-E glass, gas-filled IGUs, and multi-chambered vinyl frames to reduce heat transfer and air leakage. Engineered for Ontario’s climate, they help lower hydro bills and reduce HVAC strain year-round across the GTA.

Improved Comfort

Eliminate drafts, cold zones, and hot spots with insulated frames and compression-sealed sashes. Our windows maintain stable indoor temperatures, reduce humidity issues, and improve airflow, keeping your GTA home comfortable in every season.

Higher Property Value

New windows boost resale value with better energy ratings, modern curb appeal, and buyer-attracting features like triple-pane options and noise reduction. A smart investment that pays off in GTA’s competitive real estate market.

Noise Reduction

Triple-pane and laminated glass units with airtight seals block outside noise from traffic, construction, or neighbours. Ideal for homes in urban GTA areas, our sound-reducing windows help create a peaceful, private indoor space.

UV Protection

Our windows feature Low-E coatings that filter harmful UV rays, protecting hardwood floors, furniture, and decor from fading. Enjoy bright natural light without damage, perfect for sun-facing rooms in GTA homes and condos.

Stronger Security

Multi-point locking systems, steel-reinforced frames, and impact-resistant glass enhance your home’s defence. Designed to deter forced entry, our windows combine safety and style to give GTA homeowners greater peace of mind.

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Save BIG With Polaris

With Polaris, you not only receive top-tier window installation services in Toronto, but you also enjoy a generous 30% discount on your window installation

Why GTA Homeowners Trust Us for Window Replacement

From expert installation to ENERGY STAR® certified products, GTA homeowners rely on us for quality, comfort, and long-term value in every window replacement. All the reasons you should choose us over the others include:

Experienced Installers

Our fully licensed and trained installers follow Ontario Building Code standards and use advanced sealing techniques. With decades of combined experience, we handle every type of window replacement project across the GTA, flawlessly and on schedule.

Energy Star® Certified Products

Every window we install meets or exceeds Canada’s ENERGY STAR® performance criteria. From Low-E glass to insulated frames, our products are designed to reduce energy use and improve thermal performance across GTA homes, all year round.

Fully Custom Sizing & Finishes

We custom-build windows to fit your exact rough openings, no fillers, no gaps. Choose from dozens of frame colours, grille options, and trim styles that align with your home’s aesthetics while ensuring airtight installation and energy savings.

Lots of Styles to Choose From

We offer every major window style, casement, awning, double slider, bay, bow, picture, and more. Whether your home is modern or traditional, we’ve got functional, stylish options built for GTA climate conditions and architectural preferences.

Transferable Warranty

Our window replacements are backed by a comprehensive warranty that covers both product and installation. It’s fully transferable to new homeowners, boosting resale value and offering long-term peace of mind for your investment.

Fair Pricing & Promotions

We offer transparent, upfront pricing with no hidden costs. Take advantage of ongoing promotions like up to 30% off or don’t pay for 90 days, making it easier for GTA homeowners to upgrade without financial pressure.

Flexible Financing

We make upgrades affordable with low monthly payments and zero-interest financing on approved credit. Our team will walk you through available plans to help you choose the most budget-friendly solution for your window project.

Friendly Support

Our customer service team is here to help from your first quote to post-install follow-up. We offer expert advice, flexible scheduling, and clear communication, no pushy sales tactics, just honest support for every GTA homeowner we serve.

Stress-Free Window Replacement – Start to Finish

Free In-Home Consultation

We come to your home anywhere in the GTA to take measurements, show you samples, and offer advice.

Custom Fabrication

Your windows are made-to-order with your chosen specs, right down to trim, hardware, and glazing.

Professional Installation

Our team shows up on time, installs with care, and cleans up before we leave.

Post-Install Support

Have questions later? We’re just a phone call away. Plus, our warranty keeps you protected long-term.

Locations Across Ontario

Service Areas

At Polaris Windows and Doors, we proudly serve the Greater Toronto Area with energy-efficient window and door solutions. From Toronto to nearby suburbs, we’re your go-to local experts for boosting comfort, curb appeal, and value.

At Polaris Windows and Doors, we proudly serve the Greater Toronto Area with energy-efficient window and door solutions. From Toronto to nearby suburbs, we’re your go-to local experts for boosting comfort, curb appeal, and value.

Are you Ready to Elevate your Home?

Contact us today to explore our window and door solutions!

Frequently Asked Questions

Window replacement in the GTA typically ranges from $400 to $1,200 per window, depending on size, style, and materials. We provide free in-home estimates and offer flexible financing to fit your budget.

Casement, fixed, and double-pane windows with Low-E coatings and argon gas are top choices for GTA energy efficiency. All our products meet or exceed ENERGY STAR® Canada standards.

Yes, we serve homeowners across the entire Greater Toronto Area, including Toronto, Mississauga, Vaughan, Brampton, Markham, Richmond Hill, Oakville, and surrounding cities.

Most window replacement projects are completed in 1 to 2 days. The timeline depends on how many windows we’re installing and the complexity of the job.

Yes. If your window frames are still in good condition, we can replace just the sealed glass unit. This is a great option for foggy or cracked glass in otherwise functional frames.

Absolutely. We provide a full transferable warranty on both product and installation, ideal for peace of mind and resale value in GTA homes.

Yes, we specialize in custom-fit windows designed to match any opening. Perfect for older homes and heritage properties that require non-standard sizing.

Yes. We offer interest-free plans, low monthly payments, and seasonal promotions to help make your window upgrade more affordable.

For condos, we recommend slider or fixed windows with reinforced vinyl frames and sealed glass. We provide building-compliant options for downtown Toronto and surrounding high-rise developments.

Yes. We install code-compliant basement windows, including egress windows for legal secondary units. Our vinyl frames and sealed glass help reduce moisture and increase security.