St. Catharines Building Supplies has proudly served Niagara builders, contractors and individuals since 1968! We’re a full-line lumber and building supply dealer – plus, we carry one of the largest indoor and outdoor displays of building and landscaping in the Niagara region including an outstanding selection of exterior finishes such as brick, stone, cultured stone and masonry supplies. We inventory a full range of drywall, insulation, lumber and plywood, roofing, siding, steel studs, as well as concrete repair products. We have everything you need in hardware, hand tools, plumbing, suspended acoustic and ceiling tile and grid, kitchen and bath, windows, doors, mouldings, trim, railings, and architectural columns. Commercial contractors work with our affiliate company (in the same building) Peninsula Drywall & Acoustic Supply. Browse our catalogue and if you don’t see what you need – here or in our store – be sure to let us know and we’ll get it for you. Our knowledgeable and experienced staff is ready to answer questions and take your orders for pick up or delivery. Our yard and delivery staff are dedicated to serving your needs efficiently and in a  timely manner. Our fleet of boom trucks, flatbeds, hitchhikers and dump trucks ensure you get what you want, when you need it. Ready to get started on a project right now? Send us a request a quote, or contact us. We’re located just north of the QEW.

We're a member of Castle

Canada’s premier buying group

Since 1963, builders, contractors and consumers have been relying on Castle as their building supply partner.  Whether you’re looking for lumber, building materials, hardware or advice, hundreds of Castle dealers across Canada are trusted to deliver quality products and value. Castle dealers are independent.  They run their own stores and businesses.  They know their communities, their customers, and their needs.  That’s why Castle members are growing and succeeding across Canada – they live in the communities they serve.  At Castle, we are your trusted building supply partner.


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