High Quality, Energy Efficient Replacement Windows

Windows

from

$199

Patio
Doors

from

$799

0%
Financing

for

6 months*

We match all written estimates and give up to 10% off lowest quoted price

Replacement Windows and Doors GTA

Factory Direct Pricing

Our windows, entry doors and patio doors are manufactured in Canada using state of the art process, ensuring each door and window meets or exceeds Ontario building code.

Local Window Replacement Company

We have installed hundreds of windows and doors over the last few years, with aim to provide greatest customer experience. Our clients’ referrals and repeat business are the most important accolade for us that we always strive to earn.

Whether you want new windows for your Oshawa home or want replacement windows in Hamilton, look no further than On Star Windows and Doors. We have a team of skilled professionals for installing replacement windows in Newmarket and all over GTA. Our main aim is to provide the top-quality window replacement services for customers in Toronto, Ajax, Pickering, Waterloo, Cambridge, Kitchener, and Brantford. Our doors and windows are known as the best on the market possessing benefits such as splendid appearance, energy saving, and security.

Vinyl, Casement and Awning Windows

We install products that are laboratory tested and certified according to the Canadian Standards. Also, when you choose us for window replacement in Pickering, you get the best windows for the best price. We offer a variety of styles and sizes to suit all of your needs, including awning, casement, sliding, bay, and bow, single-hung, double-hung, and more to make your home look incredible, as well as more energy-efficient.

We also offer the best value replacement windows in Cambridge and our window installation services are most economical in Cambridge, Oshawa, Ajax, Newmarket and Waterloo. Whether you need to replace a single window or you want to update your home with more energy efficient and beautiful windows and doors, we have everything you need. We offer a huge line of vinyl replacement windows and doors in Brantford that can also be custom designed for your home.

Serving Markham, Newmarket, Hamilton, North York

When windows age, they become drafty, hard to operate, and may even develop mold. These old or damaged windows make your home unsafe, as well as negatively impact its energy efficiency. Replacing your windows is a wise decision to save money on heating and cooling costs. At On Star Windows & Doors, we install energy-efficient windows that are available in a variety of styles and finishes. As an established window replacement company in Oshawa, we are committed to full customer satisfaction by offering high-quality windows and doors that are finely manufactured.

If you’re looking for premium-quality replacement windows in Pickering, we can help you find exactly what you’re looking for. Our wide range of windows in fantastic style and designs can astound you. Whether you need replacement windows in Scarborough or Brantford, we have the most stylish collection of replacement windows. All our products are well-insulated and provide high energy savings.

Local Replacement Windows Contractor Markham

On Star Windows & Doors is a well-established window replacement company in Cambridge. Our premium window products are installed by our competent and skilled experts to last for decades. We also install dual-glazed and triple-glazed windows that are available in an array of colors and grill configurations. As the top window replacement service provider in Ajax, we offer the most competitive prices. We are also the first choice of homeowners in Bowmansville for window replacement. With us, you get the most stylish, durable, and energy-efficient replacement windows at affordable prices.

another window replacement project by ON Star Windows & Doors in suburban Ontario

  • Free On-Site Estimate

  • Professional Installation

  • Warranty & Repairs

Props from
Satisfied Customers

So happy with our new door.They did an awesome job. Also cleaned up afterwards and they were both lovely lads.Highly recommend and we'll be using this company again in the spring for a few windows in our basement that need to be replaced.
Audrey G.
Audrey G.
03:08 24 Nov 20
Vlad and Boris and whole team did a FANTASTIC JOB on my windows... 24 windows in one day! The best is, the team did a flawless work, quality windows, and left the house cleaned after. The guys are all well mannered, cheerful, and very respectful. A+ quality service!I can't thank ON Star enough!You guys are the best. I highly recommend ON Star...speak to Vlad and he will make things happen to your great satisfaction!
Alfred M.
Alfred M.
14:03 26 Oct 20
Very professional and great quality service I had all basement windows and side door installations. Would highly recommend this company! Great work
Matthew G.
Matthew G.
15:08 08 Oct 20
I received very professionally service from Richard,Sergei and their installation staff. They worked very hard and cleaned up all the debris,left nothing behind. I would recommend them to anyone . Thanks again.
Kanadalı T.
Kanadalı T.
14:10 14 Aug 20
VLad came to measure the windows that I need to change.He was very friendly and he is not the type of person who will scam you for the money. He tells you what is best at a reasonable price. All the best for this young entrepreneur.
@Vi / Mississauga
Victoria R.
Victoria R.
21:35 10 Jul 20
I am very satisfied with the great price ,workmanship and quality of the product. At first was very skeptical but they called on time and came to install first thing in the morning . Love my new window and will recommend to all my neighbors and friends. 🏆🏆Job well done . Thank you, On Star windows . 👍👍
Agnes D.
Agnes D.
03:46 23 Mar 20
Craig M.
Craig M.
20:17 08 Feb 20
Great expérience always got back to you love my windows very professional, highly reccomend
Sue H.
Sue H.
20:05 25 Jan 20
Why I chose On Star: 1) they followed up with me after giving me an estimate, 2) the price was right.Why I recommend On Star: 1) Did an expert installation finishing off with aluminum siding around the window and patio door, 2) completed the job in a timely fashion.
Ria S.
Ria S.
19:38 21 Jan 20
We were looking for patio doors earlier this year and after several quotes we decided to go with On Star due to the fact that there prices were far better then others. We had concerns that the quality might not be as good as the other more costly places but decided to take a chance because of the good reviews. we are extremely happy with the doors as well as the great quality of customer service we received.
Diane T.
Diane T.
15:11 07 Jan 20
On Star Windows and Doors went above and beyond for us. Our home sustained storm damage to the large living room window and we called so many numerous companies to have it replaced as soon as possible but because every time they called and found out we only at this time needed one window they refused to help us out. Then we found On Star on Facebook and Vlad. Vlad came out to our home, explained in detail what we required due to the our climate and stormy area. The window was quoted and ordered and made in a fantastic turn around time. Vlad scheduled our installation date and he and his professional installer came out and installed our new window. They completely sealed, insulated and finished the trim both inside and out. We are greatful and thankful for Vlad and the company and highly recommend them to anyone who needs Windows and doors done. We have no more issues at all the Livingroom is warmer, the windows work great and I can remove the screens with ease in and out with bad hands. Truly thankful for Vlad and his crew God bless Merry Christmas and happy new year.
Angie S.
Angie S.
02:13 22 Dec 19
Surinder V.
Surinder V.
20:55 14 Dec 19
just have 8 windows and a patio door installed with On Star, very satisfied... would recommend friends and family ... good job Boris
Ribbon A.
Ribbon A.
16:07 28 Nov 19
They installed three doors for us and we are very happy with installation. The individual who dealt with us was very professional, and friendly. We recommend their services for sure.
Shams N.
Shams N.
14:15 26 Nov 19
Overall a great experience with On Star Windows. They offer great prices for a quality product. Finished the job in time as promised and great finish. The entire team is a joy to work with but special mention for the installers Boris and Alex who were just outstanding.
Mukul G.
Mukul G.
14:21 19 Nov 19
Great job done in March, and so far my double door looks and works great! Installation was fast! I waited to see if the color would fade, and it hasn't.
Alice F.
Alice F.
02:13 10 Oct 19
Just had my window and two doors installed and the two men that installed them where amazing very Professional. Cleaned up after them selves explained what they where doing and very polite thank you onstar I would use this company again
Kalina
Kalina
18:37 17 Sep 19
My neighbor suggested me to hire ON Star Windows & Doors for windows replacement. I am glad that I considered her suggestion and hired them. They did outstanding job of windows replacement. Also, I have noticed temperature changes in home.Happy and contented!!
Olivia S.
Olivia S.
09:21 17 Sep 19
Excellent work, I changed almost all of windows and doors.. Great job and very fast..
Elton N.
Elton N.
13:27 14 Sep 19
Awesome job! Hired On Star Windows & Doors to replace my windows in Aurora and Niagara Falls investment properties and was not disappointed. The staff was professional, clean and polite. Definately recommend.
Nik L.
Nik L.
00:39 14 Sep 19
I have used On Star on a few occasions and the quality and service is always top notch. From first call, to site measure to ordering and finally to installation the process is painless. I would certainly recommend On Star for any of your window and doors needs.
Paolo D.
Paolo D.
16:28 10 Sep 19
The whole experience was great. Windows were competitively priced and lowest compared to the others. The quality of the windows are very good. The installation was done in a very professional manner and the windows look very beautiful after the installation. I got recommended by a friend and I feel it was worth it.
alok C.
alok C.
19:51 03 Sep 19
Can't be thankful enough to the team of ON Star Windows & Doors for installing high quality windows in my house. They are friendly and help selecting the best windows as per the requirements.Highly recommended!
James R.
James R.
10:05 02 Sep 19
I replaced 5 windows in my house. Vlad gave me the best estimate! The entire experience was very positive.The installers went above and beyond with a quality installation. They even took the time to clean up after themselves well. I am 100% satisfied with ON Star Windows and Doors. I just love my new windows. I would highly recommend them to anyone and would choose them again if there is a need in the future ! Thanks a lot Vlad !
Natalia
Natalia
03:43 20 Jul 19
Onstar windows was great! Their service was incredible, the staff was very friendly and their prices were very reasonable and competitive. They installed my windows and doors very quickly and they look beautiful!
Namrata G.
Namrata G.
17:45 07 Jul 19
Great price, great communication, beautiful installation, left house very clean! No need for paint touch ups! Would highly recommend! Thanks so much Vlad!
Linda L.
Linda L.
19:26 28 Jun 19
Vlad and his team did a great job on 5 windows and a patio door at our home. Having spent time getting a number of quotes, ON Star Windows & Doors were the most competitively priced and took time to explain the process and answer any questions we had. On the day, Vlad and his team arrived promptly and were very thorough and professional throughout, leaving the place spotless. I highly recommend ON Star Windows & Doors!
Nick D.
Nick D.
00:02 22 Jun 19
They have reliable team for replacement of windows and doors. The new windows installed by them are really of high-quality and have added value to my home. Moreover, their prices are affordable.I will recommend them to everyone who are looking for Windows and Doors Replacement Contractor.
Aiden T.
Aiden T.
09:18 21 Jun 19
I am happy that I opted On Star Windows and Doors for installation of windows and doors in my new house. Their staff completed the job within specified time, providing quality services only. The team is friendly and have good skills.Highly recommended!!
Victoria L.
Victoria L.
09:06 21 Jun 19
I had On Star Windows and doors install a new front door, great work! Very clean, dependable contractor that actually shows up the time he says, thank-you for the amazing service!
s S.
s S.
23:50 17 Jun 19
Five star: Excellent Job done. Thank you
Joe P.
Joe P.
18:20 17 Jun 19
Highly recommend On Star windows and doors.Vlad and his crew were very professional and worked very quickly and efficiently.Their pricing is extremely competitive.I would recommend to friends and family without hesitation.
Rob D.
Rob D.
23:07 13 Jun 19
If your looking to get your doors or windows replaced, I would highly recommend choosing ON STAR.I recieved several quotes from different companies and thought I would have to take out a second mortgage with the ridiculous prices I was being quoted. Thankfully I stumbled upon ON STAR. They were able to offer competitive prices and have a tone of options to choose from in terms of door/window replacement. I recently had my Entry doors and balcony French doors replace by Vlad and his team and it looks amazing. The crew was able to complete the installation in a timely manner, there very polite, and most of all keep there work area very clean and tidy at all times. I would definitely recommend choosing ON STAR if you plan on having your doors or windows replaced in the near future.
Romel
Romel
20:22 09 Jun 19
I previously dealt with another window company that had installed inferior products that failed. When I claimed warranty, the company I dealt with before went under and I hired On Star Windows to fix it, and they did a great job. All faulty windows were replaced and at a price that was very reasonable. Thank you Ken for providing great pricing and Vlad for performing such an outstanding job and a thorough clean up after.
Geoff P.
Geoff P.
17:29 03 Jun 19
On Star Windows & Doors provided exceptional service. After being extremely satisfied with their work for a different project, we decided to go ahead with another project (updating 4 of our existing windows for 3 new windows and one slide door). The company advised us on the best options for our project. The price was competitive, and the service was of high quality. It was extremely easy to communicate with Vlad, and all of our questions were answered in a very professional manner. After the project was completed, the place was left very clean. Once again, we are beyond satisfied with the work and look forward to working with this company again in the future. Trust me, you will not find a more professional team for your window installation projects.
Dmytro S.
Dmytro S.
14:59 11 May 19
From the first phone call to the cleanup after the job was completed, the On Star crew was professional, courteous and very skilled. I am very happy with our new windows and the price was very fair. I will be calling Vlad in the future for any other windows or doors that I need replaced. Being a Real Estate Broker I love when I find a contractor that I can refer with confidence to my clients - I wouldn't hesitate to send my friends, family and clients to Vlad and the On Star Team. Thanks again!
Kyla S.
Kyla S.
01:42 10 May 19
Great Experience. Quote was fair. Installation was on time and professionally completed. Even flexiable enough with to deal with a delivery during install. Definitely will use On star again on the next project
blair P.
blair P.
02:35 09 May 19
Great customer service! Great work done! Great staff too! Highly recommend them
Sofia2014’s C.
Sofia2014’s C.
01:24 25 Apr 19
Quality replacement windows reasonably priced. Fast and prompt service. Very happy with the work done. Would recommend to anybody looking for windows replacement contractor in Toronto
Max G.
Max G.
07:19 20 Apr 19
I want to take this opportunity to thank you Vlad for a wonderful job that you did today with the door and the installation. The door looks beautiful. Your service was above expectations and you’re such a pleasure to work with.The quality and workmanship on the door and the casing, was incredible. The perfection that you own is priceless. You made sure the door was perfect before you left.I will recommend you to all my friend, family, and work colleagues.Thank you Vlad!Job well done!
Ruksana K.
Ruksana K.
23:50 01 Apr 19
very professional,punctual and clean installation of 6 windows great job! would use their services in future.
frank R.
frank R.
14:02 23 Mar 19
Great service. The work was done professionally and without any hidden costs. Thank you
Katrina K
Katrina K
18:36 21 Mar 19
Excellent quality windows and door installed at great price and within the outlined time frame! On Star Windows and Doors did an amazing job from start to finish. From providing a quote to completing the installation I was fully satisfied with their professionalism, knowledge, skills and attention to detail. Will definitely recommend this company and use their services again in the future.
Kate B
Kate B
14:15 14 Jan 19
Quality product installed on schedule and at a great cost. Quote process was great, with pricing, measurements, and style choices done all in one visit. Our new door looks fantastic! I would recommend On Star if you are looking for door or window replacements.
E W
E W
17:51 12 Jan 19
Book a Free In Home Estimate or call us at 1 (800) 383-6041

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