As part of the GMS family of companies, Westside Building Material helps deliver the products, expertise, and service contractors depend on across California and Nevada. Through our network of yard locations, we proudly support residential and commercial construction projects with quality building materials and local service.
20960 Knapp St. Chatsworth, CA 91311
Mon - Fri: 5:30am - 3:00pm Sat - Sun: Closed
P: 818-700-3161 F: 818-700-3158
Please note that this location will close for inventory on October 23, 2026. Friday deliveries will not be affected, and normal business hours will resume on Monday, October 26th. We apologize for any inconvenience this may cause. Please reach out if you have questions or need assistance!
Westside Building Material is your trusted source for construction products in Chatsworth, CA. As a GMS company, Westside provides quality building supplies to commercial and residential construction customers through our yard locations in California and Las Vegas, NV.
Westside Building Material serves Southern California construction customers in Chatsworth and surrounding areas like Santa Clarita, Santa Monica, Glendale, and Oxnard. Our building supply yard on Knapp Street offers a diverse inventory that includes:
VIEW LINE CARD for a complete overview of our product offerings.
At Westside Building Material, we work hard to provide the best drywall options in Southern California, for types I-V construction uses. In Chatsworth, CA, Westside offers a wide range of standard drywall, glass-mat panels, and specialty products including:
Regular & Type X drywall
Impact-resistant wallboard
Fire-rated drywall
Mold-resistant drywall
Tilebacker
Shaftwall liner
Sheathing
Ask our expert staff and let them help you select the right drywall materials for your Southern California construction projects.
Westside Building Material offers one of the finest in-stock inventories of steel framing, steel studs, track systems, and steel accessories in Southern California. We partner with leading steel manufacturers like ClarkDietrich®, CEMCO®, and others, to bring you top-rated products.
We also offer manufacturer support for all our products, so you can have full confidence when you buy steel from Westside in Chatsworth. Steel and all other building materials from Westside Building Material can be delivered straight to your commercial or residential job site.
Visit our Knapp Street yard in Chatsworth, CA, and browse our full inventory of acoustical ceiling panels. Westside Building Material is a proud distributor of quality acoustical grid and tile products from industry leaders like Chicago Metallic® and CertainTeed®, as well as:
Standard grid applications
Special grid applications
Drywall grid applications
Performance series tile
Curved grid
Metal ceiling panels
Open plenum systems
Acoustical and wood panels
Shop for ceiling tiles at Chatsworth’s Westside Building Material and let our experts help you find exactly the right acoustical products for your SoCal building projects.
Westside Building Material is a top provider of insulation supplies for commercial and residential building projects across Southern California. For insulation projects of any size, Westside has what you need to get the job done right. We offer a full range of quality insulation solutions in Chatsworth, CA, for both interior and exterior applications, including:
Rigid foam board insulation
Unfaced insulation
Mineral wool insulation
Kraft insulation
Foil/FSK insulation
Our products come from the best insulation brands—manufacturers like CertainTeed® and Johns Manville. Let our experienced staff help you choose the proper insulation for your specific job site requirements, including the correct R-value.
Building in Chatsworth, CA? Our staff of experts bring decades of combined experience in the construction industry to help our customers find the exact products they need.
Let Westside Building Material on Knapp Street in Chatsworth be your number one resource for local building materials. Our yards across CA and NV offer a large in-stock selection of products ready for immediate pickup. We also offer delivery to your jobsite, on time, with full stock and scatter service.
Need drywall, steel, acoustical ceiling tile, insulation, or other construction products in Southern California? Shop at Westside Building Material in Chatsworth, CA, for construction supplies from the building industry’s best manufacturers.
It’s easy to get in touch with us. We’re your neighbors, and we’re here to help. Give us a call, drop by, or send us an email and let’s talk.
