Custom Window Installations and Top-Notch Service Experienced family-owned contractor committed to your satisfaction.

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Why Southern California Homeowners Choose Us

Quick and Efficient Services throughout Southern California

A Reputation for Excellence

A Professional Team of Certified Installers

Free estimates in Southern California

What Our Customers Say

Recent Testimonials

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“We can't believe the difference in our home since the windows were installed”

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Kings67 of Riverside, CA

“My experience with your staff, from the salesman, the scheduler for the installation, to the installer was AWESOME.”

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Vivi of Rancho Cucamonga, CA

“I have loved coming home these past few weeks to a cooler house. As well as being able to sit in my living room earlier this year and not needing to put on a...”

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Shannon B. of Ontario, CA

“My overall experience with everyone associated with your company is & was, exceptionally GREAT!”

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Wendy H. of Ontario, CA

“Fast, efficient and answered all questions and concerns.”

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Karen O. of Ontario, CA

Quality Window and Door Replacement in Southern California

Southern California's trusted contractor

Design Windows and Doors Inc. is a family owned business and the top provider of window and door services in Southern California. We are an A rated member of the Better Business Bureau and California League of Homeowners and ever since our start in 2005 it has been our goal to provide personalized, exemplary service at a fair price, and we take our promises seriously. We do not subcontract our installers (who are AAMA and RRP certified) and tailor our services to you, the customer.

Most of our customers would say our efforts have paid off. We receive many repeat and referred customers and take pride in the fact that we are known to be ethical, efficient, and provide outstanding customer service. So if you need window or door services then you know who to contact. Reach out to us online or give us a call at 1-909-980-3003 to schedule your free estimate!

our service area

We serve the following areas

Our Locations:

Design Windows and Doors Inc.
504 S Mountain Ave
Ontario, CA 91762
AAMA Installation Masters Certified
Certified Contractors Network
Milgard Certified Dealer
Simonton Premier Dealer