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188 reviews

Impeccable Service

Robert V.

Design Windows & Doors did an exceptional job with replacing our 30-year old windows. We couldn't be happier! From the initial quote (completely stress free and reasonable!) to the excellent customer service and communication from our Project Manager (yes, they really do assign their customers a Project Manager!) and to the installation, the professionalism and workmanship was superior. Our installers were true professionals and their attention to detail was impeccable. Everyone involved in this process went above and beyond our expectations. A huge thank you to Design Windows & Doors! Robert & Tammy Vaughan

A cooler, better looking home

Kevin G.

Thankfully I was able to have these installed at the beginning of May right before summer really started in SoCal, already I've noticed a huge difference in how cool my house is and how much better it looks from the outside. Originally it was supposed to take 2 days, but they got it done in 1 day! Very kind and professional crew. So good, I've already recommended them to a friend of mine!


Gina V.

I recently had a my kitchen garden window replaced and I must stress how HAPPY I am with my new window. It is beautiful and the installers did a superb job. They were on time, courteous and professional. I thought there would be a lot of dust but they placed a sheet of plastic to minimize dust. When done, they did a great clean-up job. Also, Martha O was a delight. She was always courteous when calling and always returned my calls in a timely manner, She is a valuable asset to Design Windows and Doors, Inc. In addition I will definitely HIGHLY RECOMMEND Design Windows & Doors, friends and family. THANK YOU Design Windows & Doors, Inc. Family!!!

Good job.

Hovanes K.

I had my two homes done by them.  The response was very quickly to set up a presentation. The sales reps came out with samples and choices.  Working with Martha was a pleasure. She kept me updated on timelines. The crew was fast, courtesy and efficient. I highly recommend this company.


Pamela M.

This company is not only very professional they are very nice, calls are returned quickly, installers work nonstop and within Covid guidelines . The French Doors are beautiful and the quality is much more than I expected. A special thanks to Brianna Flores for getting those last minute changes done for us! A great experience working with this company.

Patio door installation

Juan P.

Design Windows & Doors did a great job. They replaced a window with a patio door and it looks amazing. Martha the project manager kept me informed since the begging of the project. The installation crew were very professional and attentive with what I wanted. I would definitely use them again for any project needs and recommend them to anyone.

Great teamwork

Doug F.

Design Windows & Doors was a pleasure to work with, starting off with Khelin and Leah. The installers came out and installed 23 windows and a front door! The crew was very knowledgeable and paid attention to details. I would highly recommend them to my family and friends, thanks for doing such a great job!

Love My new Windows

Connie G.

Great service and very professional. Each and every staff member went above and beyond. Guys that installed my windows were awesome. Would recommend to anyone looking to upgrade their windows.

Happy Customer

Tanisha H.

I am very satisfied with the service of Leah and the installation team. Leah called me periodically giving me updates and letting me know the status of my installation. She is very polite and professional. The team was great as well. They arrived on time and did a fantastic job. I could not open my living room patio door with one hand before. I can open it with a finger now! Also, the trim that came with the door is beautiful! It looks so much better than before. I will definitely be recommending Design Widows and Doors to my friends and family.

Quiet Cool install

Mary c.

I was very pleased in working with Leah and her team. They were very professional and didn’t give us the run around. I would highly recommend them to anyone who asks

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Design Windows and Doors - Office Design Windows And Doors

  • 504 S Mountain Ave Ontario, CA 91762
  • (909) 377-4447