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New Castle Building Products is a family-owned & operated distribution of building products with almost 100 years serving New York, New Jersey & Connecticut. Based in White Plains, NY, our long history has seen us evolve from a sheet metal manufacturer into a major distributor of building products, specializing in window & roofing materials. We are known for our high-end custom home improvement products, including siding, cedar, slate, copper, decking, waterproofing supplies & masonry. We also pride ourselves on our incredible service & sales force that boasts the best product knowledge in the industry. Call or stop in today and see what has kept us a leader in building product supply for nearly a century and counting.