Castle Rock Building Supply

Castle Rock Building Supply is a family-owned and operated business serving the needs of contractors, builders, and DIY enthusiasts in Cowlitz and southern Lewis counties since 1930. With over 80 years of experience, we're proud to be a trusted partner in all your building project needs.

Our Commitment to Customer Service

Our team is dedicated to exceeding your expectations with personalized service and expert advice. We take the time to understand your project needs and offer tailored solutions based on your unique requirements. We pride ourselves on our helpful and friendly staff who are always ready to answer your questions and offer assistance.

Quality Products and Services

We stock an extensive range of high-quality building materials and tools, including:

• Standard Lumber: Kiln-dried fir lumber in various sizes and lengths.
• Treated Lumber: Quality treated lumber for all your decking, fencing, and structural needs.
• Plywood & Sheet Goods: Premium-grade plywood and a variety of sheet goods like OSB and MDF.
• Drywall & Insulation: Comprehensive selection of drywall products and insulation materials.
• Fasteners, Hardware & Tools: Wide range of high-quality fasteners, hardware, and power and hand tools.
• Windows & Doors: Variety of Milgard windows and Masonite doors, including custom sizes.
• Concrete & Cement: Pre-mixed concrete, cement, and cement blocks for your foundation, driveway, and other projects.

Additional Services

Beyond just selling materials, we also offer:

• Custom Ordering: Can't find what you're looking for? We offer custom ordering services for a wide range of products.
• Delivery Service: Get your building materials delivered straight to your job site for added convenience.
• Technical Expertise: Our experienced staff can provide helpful advice on product selection and application.

Choose Castle Rock Building Supply for

• Experienced and knowledgeable staff
• Wide variety of quality materials
• Competitive pricing
• Personalized customer service
• Locally owned and operated