Contact Us for a Free In-Home Estimate

Contact Us for a Free In-Home Estimate

We feature competitive pricing on all of our highly crafted products

Cornerstone Windows banner - Serving the South Bay for 25 years

Our Showroom is Open
by Appointment Only

Monday-Friday: 9:00am – 5:00pm
Please no drop-ins

Saturday: 9:00am –5:00pm By Appointment Only
Sunday: Closed

Cornerstone Windows has a *4 window minimum*

[email protected]
Call us: (310) 325-4700

At Cornerstone Windows, our expert estimators, office personnel, and installers are committed to providing skilled and satisfying service. We feature competitive pricing on all of our highly crafted products. Increase the beauty, value, security and improve energy efficiency of your home with new windows & doors. Please submit your contact form for a free, in-home estimate. We’re also available on weekends by appointment only.

Cornerstone Windows Patio Doors - 3545 Lomita Blvd Unit A, Torrance, CA 90505 - Truck Fleet

Our Showroom

Cornerstone transforms homes with our large selection of:

  • Windows: High quality vinyl and fiberglass replacement windows
  • Sliding and swinging patio doors
  • Garden Windows
  • Entry Doors
  • French Doors

CONTACT US

Tony Szik's Cornerstone Doors & Windows, Inc., Door Installation, Torrance, CA