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Cornerstone Windows & Patio Doors

4.5

About this business

Cornerstone Windows & Patio Doors is a full-service replacement window company in business since 1998. Cornerstone installs quality window products from Simonton and Milgard, along with entry doors and shutters. Cornerstone's sales approach is low key and realizes an informed consumer makes the best decisions for his or her home. Most installations take only one day and normally do not involve dry wall or stucco damage. All employees are fully bonded and insured. Cornerstone does not employ any subcontractors. Cornerstone ta... read more

Location details

3545 Lomita Blvd unit a, Ste A, Torrance, CA, 90505, United States

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WeekdayScheduleStatus
Mon9:00 a.m. to 2:00 p.m.
Tue9:00 a.m. to 2:00 p.m.
Wed9:00 a.m. to 2:00 p.m.
Thu9:00 a.m. to 2:00 p.m.
FriClosed
SatClosed
SunClosed
4.521 reviews
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Rich Mink's profile image
Rich Mink 
on Google
3 weeks ago

We had our windows replaced over 15 years ago and Cornerstone continues to provide great service! We needed some replacement screens (covered under warranty) and Cornerstone allowed us to ship the screens to them to avoid shipping charges. Then, they delivered the screens to our house at no charge! This shows their dedication to customer service, even well after the sale! 

Scott D's profile image
Scott D 
on Google
2 months ago

Tony's crew came out and replaced an old 1960s sliding door and a few windows that were in rough shape. The crew was respectful and thoroughly cleaned up after completion. Very pleased with the end result. 

Janice Miya's profile image
Janice Miya 
on Google
3 months ago
Zachary Maxfield's profile image
Zachary Maxfield 
on Google
4 months ago

We about a dozen windows and all of our doors replace. Inside and out. Great experience! Very professional, on time and they pay attention to the detail. Would recommend to anyone. 

Shaun Gehring's profile image
Shaun Gehring 
on Google
7 months ago

Cornerstone completed our entire condo with 3 sliding doors and 6 windows on Oct 31, 2024. Several were very large on both doors and windows. The owner and his son were outstanding and the work was top notch. The crew brought in, which included both of them, were very knowledgeable and efficient. They covered every detail including clean up, moulding details, educating us on care, and answering all of our questions. We are very happy with the price, process, and quality of the work. We saw significant improvements in noise r... read more

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Frequently asked questions about Cornerstone Windows & Patio Doors

How is Cornerstone Windows & Patio Doors rated?

Cornerstone Windows & Patio Doors has a 4.5 star rating with 21 reviews. 

When is Cornerstone Windows & Patio Doors open?

Cornerstone Windows & Patio Doors is closed now. It will open tomorrow at 9:00 a.m. 

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