In its 50-year history, Hampton Affiliates has expanded from a single mill operation to one of the largest privately held forest and building products companies in the United States. Its resource holdings provide much of the raw material for its manufacturing centers, which produce commodity lumber, studs and metric lumber. The company maintains a private fleet of railcars for shipping products. Hampton Lumber Sales markets lumber and panel products for domestic and world markets. It wholesales more than 2 billion board feet of lumber and panel products to 1,000 customers. Hampton Distribution Companies markets doors and windows throughout the Western United States. Hampton Affiliates has timberlands that total 167,000 acres in Washington and Oregon, and five sawmills in Washington and Oregon. It has headquarters in Portland, Ore., and sales offices in Oregon, Washington and California. The company has tree farms in Oregon and lumber mills in Oregon and Washington.