Koser Building Materials LLC is a family-owned and operated building materials supply company based in Elizabethtown, Pennsylvania. Founded in the mid-1980s, Koser has served residential contractors, remodelers, and DIY homeowners throughout Central Pennsylvania for more than three decades by providing quality construction and remodeling products at competitive prices.

The company maintains a comprehensive inventory of building supplies on-site, including lumber, doors, windows, roofing materials, siding, cabinets, countertops, and a broad range of interior and exterior remodeling products. Koser is known for sourcing factory overruns, discontinued lines, surplus stock, and premium materials, offering customers access to quality goods often at discounted prices.

Operating with a focus on personalized service, Koser combines knowledgeable staff support with inventory variety to help builders and homeowners find the right products for their projects. The business also holds periodic auctions and special sales that further support value-driven purchasing.

Located at 523 Koser Road in Elizabethtown, the company continues its commitment to the local construction community by maintaining strong product availability and service responsiveness, building on decades of regional reputation and trusted relationships.