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82 reviews

Putting "service" in Customer Service

I was replacing all the windows and doors in my home at one time and in having 5 different companies bid on the program, I learned that not all of them do window AND door sales and installation. Design Windows & Doors does and from the time I contacted them they were always professional, courteous, and timely in their follow-up and on-site appointments. From administrative staff, to my salesman and the installers, everyone was genuinely friendly, helpful, and a pleasure to work with. My entire installation project was completed was between 9 a.m. and 3 p.m. -- including their clean up of the work areas and the hauling away of my old windows and doors. Highly recommend this company to anyone seeking quality products at affordable prices with very professional installation work.

Amazing Windows!

Professional Staff clean work. I'm very satisfied with the new windows and price.

Professional and efficient

We are very pleased with the installation that Design did for us. We met 4 window contractors, and Design was easily the most trustworthy and did not attempt any upsell. In fact, while other contractors were very willing to do exactly what we wanted, Design offered suggestions about combining windows, and gave us a beautiful huge window in our front room. The contract agreement was signed in on 5/3/19 and the install was completed on 6/27/19 by Jorge, Jose, and Ruben. They arrived promptly at 8am and had the job finished (5 windows to be replaced) by 12pm. They did a full walkthrough with me, did some touch-ups, and were overall very easy and pleasant to work with. I highly recommend Design Windows and Doors, and will rehire them again for our upcoming projects.

They were just amazing!

All phone calls were returned in a timely manner and the men were very professional, clean and polite. She was always there for us. Very knowledgeable about the different types of windows. They were just amazing! Cleaned up everything and left my place the way it was before they came.


As the title states simply amazing. After half a dozen or so quotes, I chose to go with Design Windows and Doors. After the stall by my HOA, the process went extremely fast. I ended up with my original install date, when expecting a month later. The workers were on time and started to work after a quick walk through. Great job.

Everything and more

We didn’t know what to expect. Our salesman was so kind and professional. Everyone who was sent over to measure was super professional and on time! Then our windows and our door was installed, it surpassed our expectations and then some. We will be replacing all of our windows with design windows and doors.

Great service & customer relations

I purchased a dual pane garden window and it looks beautiful. All staff from the home show vendors to admin staff, salesperson, and installation technicians were professional, punctual, knowledgeable, and friendly. Overall a great experience. I highly recommend Design, Windows, and Doors.


My experience was great with this company. They have great customer service from the beginning to the end.. I can’t say enough about the installation. The workers were professional and clean which is a big deal for me. Thanks again and will definitely recommend this company to my friends.

Beautiful showcase

We had our windows replaced for more energy efficiency. However, we ended up getting even more. The windows opened up the interior of our home to where we have a lot more light. Which we truly enjoy not having to use so much electricity. Plus the additional light brightens up the interior, giving it a healthy warm feeling. The change on the outside is remarkable! When we started this project we didn’t even think about the outside. We live in a golf community and have friends frequently drive by. We have had numerous calls about the change. Asking who did the work. The view from the outside was dramatic. Thank you Design Windows for such a beautiful and professional job. Everyone from the first phone call till the completion of the project we’re so nice. We’re having considerable upgrading to our home. This project by far was the most rewarding. Thank you!

Excellent service overall

It was an excellent service overall. Really happy to have done it with your company. Very helpful the couple of times I called for information. He explained every question we had about the windows and the whole process of getting them with your company they arrived at the exact hour we had schedule, very punctual. They did a very good job with all the windows installation. They cleaned all the spaces they worked on, took all the old windows for disposal, I really liked that service.

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Design Windows and Doors - Office Design Windows And Doors

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