Finding high-quality "furniture-grade" wood involves a trade-off between the convenience of retail and the superior quality (and lower prices) of specialized suppliers. Expert woodworkers generally recommend or dedicated online hardwood dealers over "big box" stores for serious furniture projects. 1. Dedicated Online Hardwood Dealers
Online retailers are the best option if you lack a local specialty yard. They often provide "S4S" (surfaced on four sides) lumber, meaning the boards are already flattened and squared for immediate use. Go to product viewer dialog for this item. Rockler Walnut by The Piece where to buy nice wood for furniture