: A leading competitor to Home Depot with a massive footprint across the United States, providing everything from budget-friendly slabs to high-end entry systems.

For convenience and a wide variety of off-the-shelf options, big-box stores are the most accessible choice. These retailers often provide basic installation services and have online tools to help you customize orders.

: The largest home improvement retailer in the U.S., offering extensive stock for both interior and exterior doors.

Some retailers specialize in a "turnkey" experience, meaning they handle the measurement, purchase, and professional installation as a single package.

Specialty stores focus exclusively on doors and often provide higher-quality materials, custom sizes, and expert design consultations that big-box stores might lack.