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Design Windows & Doors, Inc.

About Us:

•Family Owned & Operated with over 15 years of experience in the window industry. •Owner is a Vietnam Veteran & ex-LAPD officer (ask for special discounts for Military, Police, and Fire Fighters*) •Licensed Contractor #912367 •We are financially secure and our company continues to grow. We are backed by 2 million in liability insurance and 1 million in workers compensation insurance. •A rated member with the Better Business Bureau and a member of the California League of Homeowners. •We receive a large amount of repeat and referred customers. •Financing offered through several companies.*OAC •Lifetime warranties, most include accidental glass breakage. •All installers are in house, we do not subcontract. Lead Installers are AAMA and RRP Certified. •Personalized service from start to finish. We pride ourselves on being very ethical, efficient, and strive to provide outstanding customer service.

Areas Served:

San Bernardino County, Riverside County, Los Angeles County and parts of San Diego County

Consumer Experience Rating Help
  • Exceptional Consumer Satisfaction
  • Extensive Milgard Product Showroom
  • Dealer Website with Milgard Product Info
  • AAMA Certified Installers
  • Demonstrated Product Knowledge
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Free Consultation
Special Internet Offer
Store Information:
504 S. Mountain Ave.
Ontario, CA 91762
driving directions
Monday 8:00am - 5:00pm
Tuesday 8:00am - 5:00pm
Wednesday 8:00am - 5:00pm
Thursday 8:00am - 5:00pm
Friday 8:00am - 4:30am
Saturday 9:00am - 4:00pm
Sunday Closed
  • Showroom
  • Free In-Home Estimates
  • Replacement Windows & Doors
  • Offers Consumer Advantage Financing
  • New Construction Windows
  • Carries Essence Series®
Awards & Memberships:
  • Better Business Bureau
Design Windows &amp; Doors, Inc. 4.9 5 23 23
Excellent Work Great job; Windows are exactly what we ordered. Installation was "slick.". No mess, installers cleaned up. Strongly recommend the dealer. January 7, 2015
Both the sales rep, Fausto and the measurer and chief installer, Randy were good to us Our windows were put in quickly and we are enjoying them. Our experience with both the sales rep, Fausto and especially Randy was both professional and friendly. We just bought a 40 year old house. So it was a challenge with uneven openings and Randy went out of his way to finish the job as perfect as possible...he is a cut above! A real professional in his field! We are very impressed with those we met from Design windows and doors. October 28, 2014
Dealer was very professional and made it very easy when it came time for paperwork. My windows came out great. The installation crew installed them quickly and easily. They made sure not to make extra work if not needed. They also were very friendly and honest when they answered any questions I had. July 19, 2014
Everything promised was deliversd The first person we talked to was the salesman. His name was Bill. He was very nice, knowledgeable, and easy to talk to. He wasn't pushy at all. He gave us the best price on our windows and also the best guarantee from the four companies that we spoke to. The installers were clean, respectful, and did a great job. The windows look great and are everything Bill said they would be. I would recommend them to anyone looking for new windows. July 11, 2014
This dealer were wonderful any questions or problem they were there too help. And my salesman Fausto was very informative and honest. I would recommend this Design Window &Doors, inc. too everyone ! I"m very happy about the price ,product and the people.. July 3, 2014
Happy with the experience and the end result! Design Windows & Doors did a top notch job on the installation of 14 Milgard Windows and sliding patio doors. They took their time and the fit & finish looks great. And we are very happy with the Milgard Tuscany products. They are easy to operate with convenient access for cleaning and nice security touches, allowing ventilation while preventing the windows from being opened from the outside. There was one minor installation glitch that prevented a double-hung window from properly operating, but Design Windows was quick to respond and corrected the problem. And it was an installation issue and not a window defect. So we are very happy with the overall experience, and particularly with the end result. July 1, 2014
Very good and quick and cleaned up all there mess. Very good at there job and quick on didn't leave a mess and very professional. I would recommend them to any of my friends. June 16, 2014
Everyone was on time, clean job, pleasant people to work with Everyone was on time, clean job, pleasant people to work with June 13, 2014
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For full dealer information and product availability, please contact your local Milgard Certified Dealer.

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Design Windows & Doors, Inc.


504 S. Mountain Ave.

Ontario, CA 91762