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61 reviews

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.

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.

Excellent Service (start to finish)

Our process began 11/27/18 with an estimate and ended with the install on 2/25/19. We replaced six windows, two sets of French doors, and a front door. One of the windows was an increase in size, to about double. The French doors became sliders. The process went: Sales (estimate), Financing (if needed), Final Measure Appoitntment, Order placed, Wait for manufacture of goods, schedule install, and then—install. Weather permitting—keep in mind no installs during rain/snow. I made sure to have water available for the installers and I tipped each of them at the end of the day. They were fast, courteous, clean, generally just really good people! In fact, all those who I encountered with Design Windows were good people! Very communicative. I wish I could post pictures.


Had a wonderful experience Had my windows installed Great price it's a wonderful wonderful company I recommend it

They were polite, informative, prepared.

Screens were put on wrong panel, no big deal, but not what we asked for. Installers first put doors opening wrong way but did correct it. They were polite, informative, prepared. Martha was amazing in her contact with us. We knew what to expect and the progress of our project at all times. Genesis and Richard were courteous and did a good job. We ended up with a problem with our security system as a result of replacing the door. We did not know and they did not seem to know that we could not disengage security system connection. We learned we have to pay for security company to reconnect. The two man crew respected our home and cleaned up behind themselves.

Great guys!

Very professional, great prices and great installation. Great guys! Cleaned up after.

The gentleman were the very best.

The performance was outstanding and follow through exceeded my expectations. You are assigned a key contact person after the sale. Martha was assigned to me. Martha was on top of my order every step of the way. Martha is fantastic. My sales contact was with Bill Grube. He explained the windows and the process. Everything he explained happened from start to finish. The gentleman were the very best. All were experienced, and well organized. I had 37 windows instralled. They were timely and had great people skills. The cleaned up after their work both inside and outside.

Completed job to my satisfaction.

Stayed in contact from beginning to end and kept me informed. Patient with my use of text to communicate since I'm hearing impaired so I was very appreciative. Explained all details of product clearly. On time and very courteous. Completed job to my satisfaction. Left work area in same conditions as before work.

They did an excellent job

They arrived on time and I was amazed that they replaced 9 windows and 2 sliding doors in 6 hours. They always kept me informed where they were in processing my order. Mike was very thorough on what to expect. He said they should be done in one day but 6 hours was remarkable. Each member of the crew had their specific job. There was no down time. When one of the crew was done with his job he would clean up other crew members discardings. They did an excellent job in the cleaning process.

Professional, friendly, and hard working

Professional, Top Quality Products, Competitive Pricing, and Manage Project Very Well. All 30 windows were ordered correctly and fit perfectly. Our Representative was prompt and responsive with the project planning and as well as following the project to the end. Very honest, thorough, and very competitive with pricing. Professional, friendly, hard working, very clean during installation. 30 window project finished in 1 day versus the 2 days that we were told. Crew cleaned up well after finishing.

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Design Windows and Doors - Office Design Windows And Doors

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