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192 reviews

Windows replacement

Cynthia A.

I absolutely love my new windows. Company was most professional & proficient. I highly recommend this company!

Excellent Service


The service from sales to warehouse to installation was (is) excellent!! We had a custom patio window/door installed and it’s incredible! I highly recommend them. Again the service is excellent! Thank you!

New Front Door

Monette M.

I was looking for someone to switch out my front door for two months. I wanted to make sure I went with someone reliable, honest, and would do quality work. I’m glad I went with design windows and doors. They had my door installed in one day and it looks beautiful. The quality of the material is A grade. It’s given my house the face lift I wanted. My family has given me so many compliments. The only reason it’s not a five star review from me is the technical issues I’ve been having. The Yale app included with my keyless entry has not been working since install. It was one of the main features I looked forward to when choosing the hardware for the door. However the customer service has been amazing. After setting up the lock and noticing it wasn’t working I called Leon at design windows and doors and he tried to help me trouble shoot the problem over the phone. It didn’t fix the problem, but Leon was able to schedule for replacement hardware to be sent out within a reasonable time. I plan on working with design windows and doors again to replace all the windows in my house. Their customer service is that good.

Amazing Experience!!


I had my two homes installed.  The response was very quickly to set up a presentation. The sales rep came out with samples and choices.   The crew was fast, courtesy and efficient. I highly recommend this company.

Amazing Experience!!

Rose N.

I had my previous home installed. They did an amazing job i asked them to come to do my 2nd home.  The response was very quickly to set up a presentation. The sales reps came out with samples and choices. I was kept updated on timelines. The contractors were really friendly and professional.

Beautiful custom made sliding door

Vera R.

My experience with Design Windows and Doors was a positive experience. I was pleased with the time that my special order took to arrive and be installed. The team that installed my new sliding door was knowledgeable, polite, arrived on time and was very clean. Considering that installation was upstairs directly leading out to a balcony. Great job fellas !!

Still Waiting...

Ryan T.

We ordered Milgard windows and a patio door on April 10, 2021 from Bill Grube and had nearly everything installed on August 12, 2021. We're very happy with the windows and the patio door! However, Milgard initially forgot to ship our screen door. It finally arrived on August 28, 2021, but we're still waiting for it to be installed. Additionally, during the patio door installation a chunk of stucco was broken off of our building. I called 2 weeks ago and was told that this work would be scheduled. I called 2 days ago and left a message. Still waiting...

Love our new Front Door!

Anthony R.

First let me say we love our new Front Door! everything went pretty smooth and I was in constant communication with the project manager Arthur. The installers were professional and did great work. I would recommend them to my family and friends.


Andrew F.

Our experience with this company was a good one. I don't remember the guys name who first came to our house to give us a quote. I want to say Mike? He was very upfront and honest with us and took the time to answer our questions. Afterwards once all the papers were signed we got our installation date. Michelle was our project manager and she was great. Very polite and easy to work with. Our installers were also great. They were there on time and done in less than half a day. They made sure before they left that they went over every window with us to make sure they were working properly. Overall it was a good experience. The only tough part was the long delay between the sale and the installation. But I understand that materials are tough to get now. Michelle was very helpful at explaining the delay and keeping us up to date.

Window Install was GREAT! (8 month project)

Omar R.

My experience was AMAZING, the project took place between Jan. 2021 to Aug. 2021! When we received our quote from Mike McLean, he was very honest and clear with his explanation of the different window options we had and the pricing of the project. He showed examples of past projects, that ranged from retrofits to fixing botched jobs from competitors. After we had chosen our windows and options. we were assigned our project manager, Martha. Goodness gracious, I did not think I'd come across someone as dedicated and hard working as Martha. all through out the project she was constantly on top of everything. She handled all the documents pertaining to HOA and other documentation, save for the documents that required us to fill out. when it came to the windows and the project she would always keep us posted on how things were going no matter if it was letting us know about approval ETAs or just letting us know about information pertaining to the factory and our order. Come June we receive our windows are ready for install and Luis who installed them did a splendid job. He removed the old windows and installed the new ones in less than five hours, all while flying solo! But alas! we were missing screens and the lock on one of the panels wasn't behaving too well. I let her know and before I could say warranty she had already called Milgard about the screens that were missing and had set up for a technician to come out and check our lock. The screens were back ordered and the lock i

4.9 out of 5
Out of 192 Reviews
Installation Master
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Ontario Office Design Windows And Doors

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