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

To earn the Exceptional Consumer Satisfaction Diamond, the dealer must have 15 or more reviews and maintain an average of 4.5 stars or higher.
To earn the Showroom Diamond, the dealer must have a showroom with a minimum number of Milgard products on display.
To earn the Web-Site Diamond, the dealer must have their own Web-site with information about the Milgard products and the services they sell.
To earn the AAMA Certified Diamond, the dealer must have an employee on staff that has completed the AAMA Installation Masters training and passed the AAMA Certified Installer test.
To earn the Product Knowledge Diamond, all Dealer Sales Consultants must pass a series of standardized Milgard administered tests demonstrating Milgard product knowledge.


504 S. Mountain Ave.
Ontario, CA 91762
United States



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


Consumer financing
Essence Dealer
Free estimates
Has Showroom
New construction
Offers installation
Replacement Specialist


  • Better Business Bureau

The information shown on this page is provided by your local Milgard Certified Dealer which is responsible for the content of and views expressed on this page. Milgard is not responsible for the accuracy of such content, and any views expressed do not necessarily represent the views of Milgard Windows & Doors.

For full dealer information and product availability, please contact your local Milgard Certified Dealer.

Rated 5 out of 5 Professional Sales, Support & Install From day of sitting with sales rep to the day the job was done, Design Windows & Doors provided professional help every step of the way. We were told exactly what we could expect at the time of signing & it all came true. We are delighted with the 14 new windows & the professional way by which they were installed. We highly recommend this company for anyone interested in Milgard windows. July 1, 2015
Rated 5 out of 5 by sales order number 1635638 This latest project was my second with Design windows, and doors. they came through, as usual, on all fronts. Very professional, on time, courteous, competitive pricing, and all items were completed successfully, per our agreement. I hope to use them again on future projects. The personnel are excellent, personable, from Fausto, Michelle, Tina, Leah et al. June 25, 2015
Rated 4 out of 5 by Great Installers I just got 10 Windows and 2 sliding doors installed in my condo. The installers were very nice and they got it all done within 2 days. The Windows look awesome, they appear to be sealed very well. They were good about cleaning up after themselves and communicated very well. I'm happy with everything and would recommend Design Windows. June 10, 2015
Rated 5 out of 5 by The overall experience from the assessment to installation was excellent. My experience with design windows and doors from start to finish was a good one. The initial assessment was thorough and professional, the engineer was courteous and informative, the process wasn't time consuming. The installation crew was 45 minutes early completely skilled and knowledgeable and efficient and the windows are fantastic. May 14, 2015
Rated 5 out of 5 by A company I would highly recommend As an engineer, I am very particular who I deal with, the products I choose and the way the work is performed. Choosing the product was the easy part since we had all our casement windows, bay window and sliding doors replaced with Milgard vinyl windows some years ago at our Long Beach residence. Recently, we decided to replace the eight windows and sliding door of our Rancho Mirage condominium with Milgard dual payne aluminum units. We chose Design Windows & Doors Inc. to do the work. The installation went well and the workers were curteous, neat and very professional. May 12, 2015
Rated 5 out of 5 by Design Windows & Doors is excellent to work with We had all new windows installed in our home and are extremely satisfied both with the quality of the windows and the efficiency of installation. I have recommended these windows to friends and two have already ordered the windows and expect installation in the next two weeks. We were also very satisfied with our salesman who was informative on every aspect of the process April 29, 2015
Rated 5 out of 5 by On Time and Quick Install I love DWD and all that they do! Their staff is very friendly and quick with any questions or concerns I had. I would HIGHLY recommend them to anyone looking for windows in Southern California. They have a wide area they cover and it makes it easy for me to refer people as well. Top Notch Company! April 23, 2015
Rated 5 out of 5 by Top Notch! My entire process through product review, ordering, product changes & reconfigurations, then finally installation was EXCELLENT! The entire staff was helpful and courteous throughout completion. GREAT PRICES! April 1, 2015
  • 2015-07-05T12:32:44.795-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_31, tr_31
  • loc_en_US, sid_prod.1926375_dealer, prod, sort_default