Cornerstone Windows & Patio Doors

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United States
Torrance, CA
Cornerstone Windows & Patio Doors

Cornerstone Windows installs quality window products and entry doors, patio doors, and french doors.

Permanently closed.

Cornerstone Windows' owner Tony Szik has been in the construction business for over 40 years and has focused specifically on window replacement for more than 20 years. His experience with building entire homes, has allowed him to become adept at assisting customers in creating a vision for their home. Cornerstone has an expert pre-sight measuring process that allows most projects to be completed in just one day. Cornerstone NEVER hires subcontractors and all installers speak English.

08/30/2025

Cornerstone Windows recognizes the millions of Americans who go to work EVERYDAY. Enjoy your weekend!

08/28/2025

Improve the look of your home with new windows and an entry door! Cornerstone Windows specializes in retrofitting windows and doors into existing frames with no dry wall or stucco damage. Most projects take only one day. We don’t use subcontractors and are licensed, bonded and insured. Contact us today for a free estimate!

Call ☎: (310) 325-4700 to schedule a demonstration in our showroom.

https://cornerstonewindows.com

08/06/2025

Check out this beautiful new patio door! Contact Cornerstone Windows today to have them help you find the right windows and doors for your home. We don’t use subcontractors and are licensed, bonded and insured. Most projects only take one day!

Call ☎: (310) 325-4700 to schedule a demonstration in our showroom.

https://cornerstonewindows.com

07/30/2025

Let some light in! This project is a great example of putting glass in an entry door to get light in your entryway!

Cornerstone Windows offers a wide selection of custom entry doors and help homeowners achieve the look they want for the front of their home. In addition to adding to a home’s aesthetic appeal, new entry doors increase a home’s security, improves insulation, and reduces outside noise!

Call ☎: (310) 325-4700 to schedule a demonstration in our showroom.

https://cornerstonewindows.com

07/23/2025

Improve the look of your home!

Cornerstone Windows specializes in retrofitting windows and patio doors into existing frames with no dry wall or stucco damage. Most projects take only one day. We don’t use subcontractors and are licensed, bonded and insured. Contact us today for a free estimate!

Call ☎: (310) 325-4700 to schedule a demonstration in our showroom.

https://cornerstonewindows.com

07/17/2025

Improve your view and functionality!

Cornerstone Windows specializes in retrofitting windows, patio doors, and folding/multislide doors into existing frames with no dry wall or stucco damage. Most projects take only one day. We don’t use subcontractors and are licensed, bonded and insured.

These photos are of Cornerstone’s latest project in Rancho Palos Verdes where we expanded our client’s living space by opening their home to a magnificent view with the installation of bi-folding doors.

Call ☎: (310) 325-4700 to schedule a demonstration of bi-folding doors in our showroom.

https://cornerstonewindows.com

Address

3545 Lomita Boulevard Ste A
Torrance, CA
90505

Telephone

+13103254700

Website

https://cornerstonewindows.com/

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