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Creating the home you deserve

For over 40 years, Custom Window Supply Inc. has been dedicated to providing the highest quality windows and doors for homes in Modesto and the surrounding areas. As a trusted and respected company in the industry, we are proud to have earned a reputation for excellence and customer satisfaction.

Our Services

At Custom Window Supply Inc., we understand that every home is unique, and so are the needs of our customers. That's why we have chosen to partner with the most respected window manufacturers in the industry, including Milgard, Marvin, Integrity, and Sierra Pacific. These partnerships have enabled us to offer a diverse range of solutions for home owners, regardless of budget or style.

Milgard Windows

As a Milgard Authorized Dealer, we are proud to offer the high-quality windows and doors from this renowned manufacturer. Milgard windows are known for their energy efficiency, beautiful aesthetics, and enduring value. With a FULL LIFETIME WARRANTY, you can trust that your new windows and doors will be covered for as long as you own your home.

Marvin Windows

With a rich history dating back to the 1860s, Marvin Windows has been providing premium windows and doors for over 150 years. Their commitment to innovative design, craftsmanship, and exceptional customer service has earned them a reputation as one of the world's premier window and door companies. As an authorized dealer of Marvin products, we are proud to offer their exceptional range of window and door products.

Integrity Windows

Integrity Windows are made with Ultrex, a patented pultruded fiberglass that outperforms and outlasts vinyl, roll-form aluminum, and other fiberglass composites. With a focus on durability and energy efficiency, Integrity windows are the perfect choice for homeowners seeking a low-maintenance and environmentally friendly solution.

Why Choose Custom Window Supply Inc.

With over 40 years of experience in the industry, we have developed a deep understanding of what homeowners need from their windows and doors. Our team of experienced professionals is dedicated to providing exceptional customer service, competitive pricing, and unparalleled quality products.

Get in Touch

At Custom Window Supply Inc., we are committed to making your window-buying experience as easy and enjoyable as possible. Our office hours are Monday to Friday from 1:30 pm to 4:30 pm, and we welcome appointments at your convenience. Contact us today to learn more about our products and services.

Reviews (2)
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Positive: Both authors have had excellent experiences with CWS, citing their expertise, helpfulness, and professionalism, and highly recommend them for window-related projects

Overall Experience

The reviews suggest that CWS has a strong track record of providing excellent service and expertise in the window replacement and installation industry. Both authors have had positive experiences working with CWS, citing their helpfulness, knowledge, and professionalism.

Expertise and Knowledge

Both reviews highlight the extensive knowledge that CWS possesses in the window industry. The author of the first review mentions that CWS has always provided excellent service and is great to work with, implying that their expertise has made a significant impact on their projects. Nathan Smith's review specifically mentions that CWS has a lot of knowledge in the industry of window manufacturers, making them a valuable resource for customers.

Service and Communication

The reviews also emphasize the excellent service and communication that CWS provides. Both authors mention that they were very helpful and responsive, indicating that CWS prioritizes customer service and effectively manages communication.

Recommendation

Both authors highly recommend CWS for any window-related projects. Nathan Smith explicitly states that CWS is highly recommended, while Ron Barber Jr.'s glowing review implies that CWS would be a top choice for anyone in need of window replacement or installation services.