Just a few minutes north east of Newmarket, on Highway # 48, there exists one of the largest new & used building materials yards in Ontario (see map). Imagine five full acres of new and recycled building materials, including lumber, structural steel, doors, windows, and much, much, more.

 We, at National Building Supplies have joined Castle Building Centres to give our customers even better prices on new building materials. We now have a full line of new spruce lumber, many different and unusual sizes. We also carry hardware, nails, screws and other fasteners. National Building Supplies is changing in a positive way with new building materials but we will always have our re-usable salvaged material that our customers love so much.

Drop by and visit our helpful and knowledgeable staff for huge savings on your next project or renovation.