Richard K.
7/9/2025
I had recently purchased a home and needed help with two windows. I had an excellent appointment with the tech.
Cornerstone Windows & Patio Doors
Closed
(91)
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3545 Lomita Blvd Ste A
Torrance, CA 90505
Cornerstone is a provider of a range of door and window replacement products. Based in Torrance, Calif., the company provides its services to the areas of Redondo Beach, Manhattan Beach, Hermosa Beach, El Segundo, Lomita, Gardena, Hawthorne, Rancho Palos Verdes, Rolling Hills Estates, San Pedro, Long Beach and Carson. It offers a selection of vinyl windows, exterior doors, patio doors, French doors as well as garden and bay windows from some of the nation's leading manufacturers. The firm's suppliers include American Integrity Windows & Doors, ThermaTru Doors and Simonton Impressions, to name a few.
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Reviews
4.591 reviewsR J.
11/11/2025
Cornerstone has THE best service, quality & value bar none! We've been doing business with Tony and his excellent company for decades. They aim to please!
Maria F.
7/9/2025
Don't call cornerstone unless you need product AND installation. Apparently they don't sell product unless you want to pay them to install which is fine but there's a better way to say it instead...
Michael L.
5/21/2025
We learned about Cornerstone from our neighbors who'd had first-rate experience with Tony and Cornerstone over many years. It turned out to be a great experience for us, too, relying on...
Christi M.
4/30/2025
These guys are so wonderful and family owned! Tony runs a great company with long term employees. My installers were Antonio (work with Tony for 18 years) and his son Jake (12 years). The quality...
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