Doors and Windows
Replacement Thornhill

save up to 60%

Does your Thornhill home need new windows or doors? Get started below:

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Get the Best Value on Windows and Doors Replacement in Thornhill

Homeowners in Thornhill know that for high-quality, efficient windows and aesthetically pleasing doors, they can trust our experienced windows & doors replacement company. Our extensive portfolio of completed replacements boasts thousands of satisfied customers in the GTA and beyond.

Whether you need durable entry doors or vinyl windows designed for optimal performance, we have the perfect solution for your needs. With a commitment to superior craftsmanship and customer service, we ensure your home is stylish, comfortable, and energy-efficient.

As A Top Rated Windows and Doors Company,  We Offer:

  • Great Customer Service
  • High-quality Windows
  • Competitive Prices In The GTA
  • 5-star Rated Team Of Experts
  • Full Service: Engineering, Design, Consultation, Window & Doors Selection, Removal of Old Windows and Doors, Installation, Insulation, Clean Up, Follow Up & Warranty
  • Factory-direct Windows And Doors Straight From The Source (No Hidden Fees)

With so many options available and a team of experienced professionals on hand to guide you through the selection process, we guarantee satisfaction with every installation in Thornhill.  Whatever your window or door needs may be, you can count on us to provide the perfect solution.


Is your home located in Thornhill? Do you need replacement windows and doors? You can save just like David & Judith.

Read more about their story and learn how you can save on your windows and doors just like David & Judith.

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Check Out Our Recent Windows and Doors Replacement Projects In Thornhill

Our Process

At Windowsville, our process of installing new windows and doors for your Thornhill home has been designed to be as seamless and convenient as possible.

From the moment you contact us to the time we install your new windows and doors, we strive to keep your effort to a minimum with our ultimate goal being your happiness.


Free in-home no-obligation consultation.


Preparation of paperwork with all details, signing contract.


We'll visit your home and take accurate production measurements.


We'll schedule an installation date that works for you.


We'll install all products in a timely manner.


We'll provide a warranty on both the installation and products.

Reliable Windows & Doors Services in Thornhill

We offer the best value for replacement windows and doors in the Greater Thornhill Area and its surrounding cities. Why? Windowsville and its partners have been providing the complete customer experience - we consult, we sell, we install, we service, and we back up everything we do with a great warranty. When you're looking for genuine service paired with high-quality products, we are the right windows and doors company for you!

We Consult

We Supply

We Install

We Service

What sets Windowsville Apart


Our energy-efficient windows and doors can save you up to 60% when combined with various discounts and savings on your energy bill.

Fair and Honest Prices

We care about your budget and offer honest and fair prices for our high quality windows and doors. Working with us will guarantee the optimal combination of value and price for your Thornhill home.

Lifetime Warranty

Our Unlimited Transferable Lifetime Warranty covers every aspect of your windows. We provide the peace of mind of knowing that you'll be taken care of.

Outstanding Service

No order is too big or too small at Windowsville. We provide personalized service from initial contact, throughout the consulting phase, and until project completion.

One-Day Installation

Quality Installation is a critical factor for project success. All our windows and doors are installed by the most capable and experienced professionals adhering to rigorous safety practices and building codes.

Customer Satisfaction

Our attention to detail and commitment to customer satisfaction has earned us a stellar reputation, which we aim to uphold with each and every windows and doors project in Thornhill and the GTA.

windows installation and replacement Thornhill

Trusted Thornhill Windows Company

For complete window replacement solutions in Thornhill, look no further. Our full-service team covers everything from the initial onsite assessment and measurements to delivery, installation, and more. We also promise precision and careful disposal of debris for a streamlined process that leaves your home looking better than ever. With our exceptional customer service and quality products at competitive prices, we make homes across the GTA brighter and more efficient.

We carry a wide selection of Energy Star certified double hung, single hung, awning, casement, double slider, single slider, bay, bow, fixed, end-vent, shaped and Egress windows that come with a guarantee of maximum energy efficiency.

Here is just a short sample of windows options and features:

  • Thermal Unit Options: Double Glazed or Triple Glazed
  • Glass Options: Clear, Frosted, Textured, Tinted, Laminated & More
  • Finish Options: Paint or Stain
  • Grilles Options: Internal, External or Custom
  • Lock Options: Standard, Multi-point or Custom
  • Frame Package Options: Wooden, Vinyl or Hybrid
  • Installation Options: Retrofit or Brick-to-Brick

Our experienced team will take care of your window replacement project with the utmost accuracy and attention to detail. We guarantee that you'll love the end result – beautiful, modern windows that enhance the look of your home!

Popular Window Options & Features

energy star partner toronto

Energy Star - Highly Efficient Windows

Energy Star certified windows are designed to be more energy efficient than traditional windows. In addition to saving money on energy bills, they can also help to reduce your home’s carbon footprint.

Energy Star certified windows help to keep your home cooler in the summer and warmer in the winter, making it more comfortable for you and your family.

Vinyl windows experts

Vinyl Windows Thornhill

Vinyl is a durable material that is not susceptible to warping or rotting like wood, and it requires little maintenance. They are also available in a variety of colours and styles to suit any home. Are you preparing to sell your property? Consider vinyl windows to increase the value of your home. These windows offer a great combination of beauty, durability, and energy efficiency, making them an excellent choice for home and property owners.

triple pane windows

Triple Glass Thornhill

Triple glass windows are a type of window that consists of three panes of glass. Argon is used instead of air in the internal cavity of the glass units. Argon is an odourless, inert, safe gas that is denser than air. As a result, triple glazed windows provide reduced inter-pane convection and improve thermal insulation efficiency.

Triple pane windows are also generally thicker than single- or double-paned windows, which makes them more resistant to breakage. So if you're noticing drafts in your home, consider triple glass windows as they offer a number of benefits, including improved energy efficiency, increased sound insulation, and enhanced security.

window colour options

Colour Options

When it comes to choosing vinyl windows, there are a wide variety of colours available on the market. White is the most popular and affordable colour choice for vinyl windows, as it provides a clean and classic look. However, other popular colour choices include beige, brown, and grey.

There are also a wide range of darker colours available, such as black and navy blue. These darker colours can provide a more dramatic look for your home.

easy maintenance windows

Easy Maintenance

When it comes to easy maintenance windows, vinyl windows are some of the easiest to care for. Unlike wood windows, they don't require painting or staining, and they're also resistant to rot, warping, and insect damage.

These windows are designed to be weather-tight, so they won't let in drafts or leaks. As a result, you can expect your vinyl windows to provide years of trouble-free service with minimal upkeep.

entry door installation and replacement Thornhill

Replacement Entry Doors Thornhill

Our entry, sliding, french and storm doors are crafted with the utmost precision to ensure maximum longevity. Recognized for their durability and energy efficiency, our steel and fiberglass doors make for the ideal entry door replacements in your Thornhill property. Plus, all of our products are factory-direct - allowing us to source and install any chosen door within an efficient time frame.

We understand how important it is to find a reliable team who can provide you with the highest quality service. With that in mind, we prioritize performance and customer satisfaction above all else by offering customization options when selecting new doors. The perfect combination of top quality paired with unbeatable performance - that's what we're all about!

Features We Offer:

  • Steel & Fiberglass Doors
  • 100% Composite Frames (Designed To Endure Canadian Weather)
  • Privacy, Clear or Decorative Glass
  • Multipoint locking system
  • Sidelites & Transoms
  • Various Threshold Colour & Types
  • Wood Grain or Smooth Texture
  • Stained Finish or Painted Hue of Your Choice

Contact us today to get started on your very own door replacement!

Popular Door Options & Features

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Steel Doors Thornhill

As a result of being constructed with 24 gauge galvanized steel, our steel doors require little maintenance, as they are not susceptible to shrinking, warping, denting, and rotting. As opposed to mass-produced doors, Windowsville doors are crafted with meticulous detail and are of impeccable quality.

With a wide range of design options ranging from traditional to contemporary, as well as a wide range of glass options, colours, materials, and sizes, the possibilities are virtually endless. In addition, Windowsville steel doors provide excellent fire protection as well.

fiberglass door

Fiberglass Door Thornhill

With fiberglass doors, you get the best of both worlds in design and functionality. The surface of a fiberglass door can be designed to look like authentic wood, and colour can be applied to it without fear of decay, deformation, or peeling. You can also choose from a wide selection of grille patterns including stained glass and wrought iron.

Fiberglass doors are resilient to the harshest Canadian weather and are more energy-efficient than wood doors. There is hardly any maintenance required and stands up well against extreme temperature fluctuations. Fiberglass doors provide exceptional insulation and high levels of resistance to force, thanks to a reinforced frame and high-density polyurethane foam core.

door colour options

Colour Options

Our steel and fiberglass entry doors are available in various colours and finishes to suit your needs. You can choose from a variety of stain and paint options to find the perfect look for your home.  Our wide range of colours include traditional wood grain finishes and contemporary brights.

door styles and options

Variety of Styles

Windowsville doors can be combined with a combination of transoms and sidelites to bring additional style to your home entrance. Our options for door structures include single or double doors, single or twin sidelites as well as the addition of a transom with your chosen configuration.

There are numerous additional configuration options available due to the doors, sidelites, and transoms being available in various sizes, shapes, and designs.

entry door hardware options

Hardware Selections

It doesn't just stop at choosing the perfect entry door. Accessorizing the entry door with the right hardware is what completes the look! At Windowsville we offer hardware options such as knob and deadbolt, handleset, leverplate, electronic and pull bar. Looking for a modern and sleek look? Then Pull bar is the perfect choice for you. Fancy something more traditional? Handleset and lever plate hardware tie in a traditional aesthetic perfectly. For our tech savvy homeowners, we offer smart and electronic hardware too!

Easy & Flexible Payment Plans

Upgrading to new, energy efficient windows and doors could not be easier.

no payments for 12 months

No payments for
up to 12 months

Order your Windows and Doors now and don't pay for up to 12 months with 0% interest during deferral.

low monthly payments

Low monthly
payment plan

Skip excessive financial pressure by stretching your payments over longer periods of time. Payments start from as low as $15/month!

We offer service across Southern Ontario, but here are some kind words from our customers in Thornhill...

patrick moffatt
patrick moffatt
Amazing company. Came and did all the exterior doors on my project and did a fabulous job! The installer was very knowledgeable and asked me what profiles I wanted on site mid installation. Would recommend to anyone out there!
Andrew White
Andrew White
They did a phenomenal job! we are very pleased with the windows, and even where there was a miscommunication and the wrong trim was used, they went and purchased the correct trim and replaced it same day.
Chang Chi
Chang Chi
Great customer service with beautiful product at a fair price. Thank you
Navdip Randhawa
Navdip Randhawa
Amazing workspace, intelligent individuals with unique skills and trades. They will ensure perfection on any job.
NIcole O’Callaghan
NIcole O’Callaghan
My parents recently got their home windows redone by Windowsville. My dad couldn’t stop talking about the amazing service from beginning to end offered by Arik, Dimitri and the team from sales to measuring to installation. He is so happy and they like the windows very much.
Tewolde Tewolde
Tewolde Tewolde
Amazing job
Semion Govergun
Semion Govergun
Windowsville did an amazing job replacing our windows and doors. Definitely recommended.
Divyen Patel
Divyen Patel
From the initial consultation to the installation process, I was always kept updated with my project. Their quality and price are unbeatable. All of the staff were very polite, courteous and professional at all times. They did an excellent job on our windows and doors. If your in the market looking to replace your windows and/or doors, I would highly recommend Windowsville!
Narbeh Khachikian
Narbeh Khachikian
Thank you Arik, Arthur, Sergey and the team at Windowsville. They did a very good clean job even with our California shutters they were able to remove and pit back in place with the new windows. I would highly recommend this company

Top-Rated Thornhill Windows & Doors

"At Windowsville, we take great pride in offering top-rated window and door installations, replacements, and services throughout Thornhill, addressing the unique needs of the diverse neighborhoods in the area. Our unwavering commitment to quality and customer satisfaction distinguishes us as the trusted choice for all your window and door needs.

  • Beverley Glen - L4J
  • Langstaff - L4J

Frequently Asked Questions In Thornhill

Windows Type   Price Range
Casement  $380 - $1,100
Awning  $380 - $1,100
Slider  $260 - $850
Hung  $270 - $890
Bay/Bow  $2,250 - $5,900  
Egress  $490 - $760
Door Type Price Range
Steel Door  $1,200 - $6,900 
Fiberglass Door   $2,300 - $12,900 
Sliding Door  $1,350 - $3,900
Storm Door  $1,200 - $1,900

With years of experience, our team of skilled window installers has been providing premium products and services for residents in Thornhill. We understand the unique needs and regulations that come with municipalities and building codes in Thornhill and other GTA neighbourhoods. Despite the challenges of tight areas and limited parking, our crew has no trouble navigating such spaces, making us the ideal choice for all your windows or door needs. Plus, we offer competitive pricing so you can get the best value for your money.

Our aim is to provide our customers with the best service possible, and to do this we have come up with an effective 6-step process designed to help complete projects quickly and efficiently. We understand that each project has its own timeline, so we'll keep you informed from start to finish and provide regular updates so that disruption to your day is kept at a minimum. Thanks to our streamlined approach, you can trust us to get the job done quickly and professionally.

Grace and David were able to save big by taking advantage of the great offers provided through Windowsville. With discounts on all currently running services, they were able to reduce their costs by an amazing 80%, setting them up for success. Their success story serves as a great example for anyone looking to save money, so be sure to check it out! 

If you're looking to modify the size or shape of your windows, then it's important that you obtain the necessary permits before proceeding. This is key to ensuring that any changes made meet local building codes and regulations. Taking the time to secure a permit will ensure that your window modifications remain up-to-code and safe for everyone. Windowsville can help you when it comes to obtaining the correct permits!

It's time to rethink your windows and doors if you are noticing condensation, damage or moisture. Replacing your front door should be a priority if you feel cold air coming through or are noticing any signs of wear and tear. What's more, replacing an outdated entry door is imperative if it no longer serves the purpose of keeping your home safe. A new window or entrance can add value to your property and ensure that your family is well-protected.

All Windowsville windows are designed to meet current ENERGY STAR® standards and will make you eligible for energy savings. Not only do they produce long-term financial benefits, but they also promote environmental sustainability. An investment in new windows not only helps you save money on your monthly energy bills but also helps reduce your carbon footprint.

At Windowsville, we take great care to minimize our environmental footprint during the installation and construction process. We always strive to maintain a clean work site and use cleaning methods that are safe for the environment. Our commitment to reducing our impact on the environment doesn't stop at construction; we make sure all of our products help you save energy and reduce your carbon footprint.

At Windowsville, you can expect a prompt response to your request. We guarantee that one of our experienced consultants will be in contact with you within three business days. 

We are dedicated to providing high-quality installation of windows and doors all year round. During the colder months, we take special precautions to ensure that energy losses are kept to a minimum. In the event of any inclement weather, our team will work with you to reschedule the time of installation for your convenience.