For homeowners and DIYers in 2026, the cheapest places to buy shingles are typically big-box retailers like and Home Depot , which leverage massive purchasing power to offer lower prices than most local distributors. While 3-tab shingles remain the absolute lowest-cost option, architectural shingles are often recommended for their superior durability and minimal price difference. Top Retailers for Best Prices The Roof Store | Online Roofing Supplies at 50% Off