At Builders Alliance we know lumber. We sell the best lumber around because better lumber equals better results. Proudly serving professional builders and contractors throughout Whatcom County since 1913. We also provide building materials needed for multi-home projects or custom home builds including cabinets, countertops, doors, windows, millwork, tools, hardware, and other building supplies Need help with your deck design? Our team of deck experts will help you select the deck materials, railings and hardware needed to build the deck of your dreams. Stop by one of our 2 locations in Bellingham and Sedro-Woolley.