Thornhill Windows
Superior Quality Energy Efficient

Replacement Windows & Doors in Thornhill

No payment,
No interest
for 6 months
Bryan Baeumler
Bryan Baeumler

HGTV Host and #1 Expert in Quality Construction and Renovations

Canadian Choice Windows & Doors are approved and recommended by Bryan Baeumler
Windows Installers

Thornhill's Premium, All-in-One Local Replacement Window and Door Manufacturing and Installation Service

Are sub-par windows and doors making your life difficult? Dealing with leaky window sills, cold drafts on winter nights, foggy panes on humid summer days, or a scratched sliding patio door that refuses to open? Canadian Choice Windows and Doors offers made in-house, premium energy-efficient replacement window and door accessible to households across Thornhill.

As one of Canada’s longest-running replacement window companies, our high standards are something to maintain at all costs. With products endorsed by Bryan Baeumler, we're committed to bringing Thornhill families style with a smile with our industry-leading truth maxim hardware and our factory-trained and insured installers and project managers to provide the perfect blend of quality products and service.

Get More for Less with Canadian Choice Windows and Doors

Comprehensive Warranty

We manufacture AND install our products. Discover flexible coverage options for all Canadian Choice-made products with additional 25-year warranties included.

Unbeatable Payment Plans

NO payment, NO interest for 6 months.

Custom Design for Any Home

Choose from up to 40 unique styles and upgrade to ANY colour.

Elite Energy Efficiency

With revolutionary DraftLOCK technology, save UP TO 50% on energy costs.

Premium Reputation

More than 3000+ positive reviews, 100K+ satisfied clients and over 1M windows and doors installed across Canada.

Hassle-FREE Process

A dedicated Thornhill project manager will lead your project from A to Z.


more than 1 million windows installed


more than 100,000 satisfied clients

10 years

Home Stars award winning company

Window Corner

Premium Quality
Replacement Windows and Doors in Thornhill.

We maximize your home’s value with our bright, beautiful and expansive window designs to make your home bigger, brighter and beautiful. Enjoy your home to the fullest with our elite hand-crafted design.

Now, with our newly designed Low-E coating technology, reflect heat during summers and cold during winters for all-year performance. Choose Canadian Choice Windows and Doors and learn more about our exclusive window and door features and limited-time offers today!


Thornhill's #1 Replacement Window and Door Installers

We strive to uphold our reputation at all costs, your satisfaction is our #1 priority. We provide customers with premium-end replacement products tailored directly to your needs. Our experienced staff are factory trained in-house and licensed at our Canadian Choice facilities to ensure you receive the highest standard of service.

With a nearby local head office, Canadian Choice Windows and Doors has been proudly serving Thornhill for over 30 years and is committed to providing every household with the opportunity to get the time you lack, the options you crave, and the service you want to bring you the long-lasting windows you need.

DraftLOCK Manufacturing
We Manufacture.
We Install.
We Service.

Replacement Window and Door Series

DraftLOCK Slim Contour Series

Slim Contour Series

A great solution for larger windows, the slimmer frames and mullions on the draftLOCKTM Slim Contoured Series has a glazed surface area that allows more light into the room while maintaining a great view of the outdoors.

DraftLOCKplus Slim Contour Series

Slim Contour Series

This is our triple-pane window solution, with the same slimmer frames and mullions on the draftLOCKTM Slim Contoured Series. The Plus series is reinforced and designed with superior weight bearing features for greater durability and long-term performance. A top Energy Star performer with an industry record R-value and Most Efficient of 2021, this window series guarantees a 25% greater energy rating for your home. Hello Canada Greener Homes Grant!

Euro Series

Euro Series

Do you want to be the cool kid on the block? The Euro Series has the latest technology and style for modern homes. The Euro Series window tilts and swings open up to 180 degrees for more air flow control, greater outside views, and they are so easy to clean.

Entry Door Systems

Entry Door Systems

Our exterior doors are manufactured in Canada using high quality materials for ultimate durability and energy efficiency, which maximize your home’s curb appeal and market value. We offer a variety of additional sidelites and specialty shaped transoms.

Patio Doors

Patio Doors

Our Patio Doors are available in different styles including tilt and turn, bifold, sliding, and stacking.

Working directly with homeowners in Thornhill and communities including, but not limited to: Markham, Beverley Glen, Concord, Richvale, Bayview Glen, Thornhill Woods, German Mills and more!
HomeStars 2022
Energy Star

Experience Cutting-Edge Quality with

Canadian Choice Windows and Doors strives to provide Thornhill with the best of replacement window and door by taking advantage of recent technological innovations to optimize the user experience. Our qualified installers and project managers are here to help every step of the way with the design, planning and installation of your project.

If you’ve experienced leaking, foggy or cracking windows before, not to worry. Canadian Choice’s new and improved DraftLOCK Plus technology is here to bring our triple-sealed vinyl window frames, internal thermal insulation spacers, Low-E coating, as well as impact-resistant and soundproofing frames to your home. Find out how you can experience the best of window and door replacements in Thornhill at LESS of a price.

Choose from over 40 distinct styles as well as ANY colour to turn your home from ordinary to extraordinary. No matter the style, no matter the place, our long term secured products ensure that no home is left behind.

Leak Proof Performance

Our windows and doors are made with an advanced ASTM-approved acrylic system that eliminates unattractive rubber strips, which deteriorate over time, and securely bonds the sealed glass unit to the sash.

World Class Energy Efficient Glass Units

Glass units supplied from world class manufacturers Cardinal I.G and Guardian Glass featuring exceptional LoĒ Glass Coatings.

Optional Foam Insulation

Foam insulation will increase the thermal efficiency of the window.

Premium Hardware

Superior quality hardware increases the durability of your windows and doors.

DraftLOCK™ Polymer Spacer System

Designed for consistent window performance durability.

100% Eco-Friendly & Recyclable

Constructed with the highest quality lead-free uPVC, all our windows are UV resistant and will not fade, discolour, warp, crack or peel.

Maximum Strength Profile Corners

For increased strength, all frame and sash corners are fusion welded throughout.

Super Efficient Frames & Sashes

Multiple-chamber frames and sashes ensure greater thermal efficiency and excellent soundproofing.

Slim Contoured Design for Contemporary Look

Contoured design creates a more modern aesthetic and feel.

Comparison Illustration
Industry Avg.
Comparison Illustration
Comparison Illustration

Comparison Illustration

Comparison Illustration

4 1/2 Frame
Slim Frame
Euro-finish Colours
Foam Filled
25-year Warranty
SAWDAC Installation
Energy Efficient
Energy Star
Energy Star
Energy Star 2023
Energy Star 2023
24Hr Polymeric Spacer
Hidden Rubber Gaskets
Triple Glass 13/8

The images displayed on this website are for illustrative purposes only and may not fully represent the actual product.

1000s of Colors & Textured Finishes

Transform your home from ordinary to extraordinary with our new Coloured & non-glare textured finishes. Available in a wide array of colours as well as custom-matched colours for your very own personalized look.

Our Most Popular Replacement Window Colors:

Rainware White Color Swatch
Sandalwood Color Swatch
Brownstone Color Swatch
Commercial Brown Color Swatch
Wedgewood Blue Color Swatch
Pebble Color Swatch
Venetian Red Color Swatch
Iron Ore Color Swatch

DraftLOCK Windows are definitely one of the most attractive and energy efficient windows on the market. Built to last and backed by an industry leading warranty, these windows are truly a great investment that will enhance the value of your home for years to come.


Best Home Window & Door Reviews

satisfied customers
positive reviews on HomeStars
Amit and Tisha
Amit and Tisha, Oshawa, ON
Sam and Liz
Sam and Liz, Toronto, ON
Liam and Mary
Liam and Mary, Hamilton, ON

New Windows And Doors

Windows & Doors Installation & Service in Thornhill

My sales rep Stan was great and pricing was very fair

Mike and the install team worked hard and did a great job

Would recommend Canadian choice windows and doors to everyone!


Windows & Doors Installation & Service in Thornhill

We had a good experience working with Tony from Canadian Choice Windows and Doors. He carefully walked us through the process, and even where there were hiccups along the way, he helped resolve the issues and made sure the work was done to our satisfaction. We believe he has his clients’ best interest in mind in all that he does.

I.e some of the trim we wanted was not available but he provided various options that match our needs. Also after the project installation was completed and the snow melted we requested a clean up the patio area.

7 windows replaced various types and sizes

Windows And Doors

Windows & Doors Installation & Service in Thornhill

My windows and my doors were old probably from the builders, my sister told me about this company she did her house too

Windows And Doors

Windows & Doors Installation & Service in Thornhill

The service was fantastic from start to finish !from booking to getting my windows install . Stan abs Harry abs their team were great !


Windows & Doors Installation & Service in Thornhill

Our home is approximately 20 years old, however the existing windows had numerous problems which led us to Canadian Choice Windows and Doors. From the get go they were responsive and professional. Stan helped guide us through the decision making process and financing options with ease. He really understood what we wanted and helped us make a very big decision, seem simple.

The window installation was scheduled on-time. Slava and Max are hands down the best installers! On time, worked fast and clean. They had the challenging task of adding a net new window, in extremely cold temperatures. This caused some delays but they communicated very effectively as to why and when they would return. There were only minor delays but well worth it; the final product is gorgeous!

Overall this was a great experience and I would recommend them.

Window and Door Installation Financing Made Easy
Accessible energy efficient windows and doors for every family.

Canadian Choice Windows and Doors understands that home renovation can take a toll on financially struggling families. That’s why we’ve instituted low monthly payment offers starting at $69/month so that every Thornhill family has access to quality replacement window and door.

In addition, now with Enbridge's Home Efficiency Rebate Plus' Grant, cover up to $5,600 off your home window and door retrofitting costs today. Our team will help you maximize your eligibility so you can get more for less.


Custom User-Designed Energy Efficient Windows and Doors

Whether it’s mowing the lawn, lighting your home, or using the heat and A/C, Thornhill’s energy demands are huge. That’s why keeping homes warm, safe and cozy all 12 months of the year is a priority. If leaky window frames, warped panes, cracked sashes and creaky hinges are bothering you, it’s never too early to fix it.

Canadian Choice Thornhill Windows and Doors works with you to find the optimal window and door designs for your home whilst taking your opinion and design choices into consideration.

replacement windows in Thornhill
Certified Installer

Do you have “non-standard” window sizes that make shopping for replacement windows a pain? Whatever your concern, our custom-made products are here to help. With flexible vinyl-engineered material, our windows and doors are crafted to fit virtually any home whilst also perfecting your home’s lighting, energy efficiency, security, aesthetic, and more!

Regardless of your home, we’re determined to bring you the best we have to offer, both in terms of our window and door replacements as well as with our personalized service. Canadian Choice Windows and Doors avoids working with subcontractors and instead hires factory-trained and insured installers as well as certified project management experts with years of experience in the field of home renovation to help you determine the ideal window and door design for your home.

We Love Ontario!

Our DraftLOCK windows employ Low-E coating which works as an agent that reflects heat during summertime and absorbs it during wintertime to keep your home and your chequebook comfortable year-round, while our uPVC material upholds our pledge to create greener, more efficient replacement windows and doors for Thornhill and Canada at large, all with a 25-year transferable warranty included at NO additional cost to you.

Find out how you can save up TO 50% OFF your installation costs with Canadian Choice Windows and Doors.

Being committed to bringing greener windows and doors to Thornhill also means partnering with Canada’s Greener Homes Grant to help homeowners cover up to $5,600 of their home retrofitting costs. Contact your local project manager today to assess your home and discover how you can save more for less!

We Love Ontario

Thornhill Windows

Canadian Choice Windows

Thornhill is a suburban community in the York Regional Municipality bordering Toronto and the City of Richmond Hill. The population of Thornhill is rather large and diverse, with almost 115,000 citizens as of 2022.

Thornhill has more than 20 parks that provide the community with plenty of natural landscapes. Locals can also visit a range of stores and shops located in the Promenade Shopping Centre, as well as the York Farmers Market on Yonge Street, which has been operating since 1953.

Thornhill is a rather populated community, with a large number of locals that are choosing to purchase private dwellings in the city. Therefore, Thornhill is home to many trusted services, including Canadian Choice Windows & Doors, a reliable service provider of quality window and door replacements for customers in Thornhill.

Take advantage of Canada’s Greener Homes Grant today!

Save thousands off your new window and door installation. Find out if you qualify!

Southern Ontario: