What is the standard height of a door opening?

The standard height of a door opening is typically 6 feet 8 inches, which is commonly accepted in both residential and commercial construction. This clearance allows for comfortable passage not only for average-sized individuals but also accommodates the installation of standard doors that are usually 80 inches high. This height considers functionality and practicality, as most standard door frames and doors are designed to match this dimension, facilitating ease of access and consistent building practices.

Choosing this height ensures that door installations maintain uniformity across various construction projects, helping contractors meet building codes and client expectations efficiently. While there are taller doors available for specific architectural styles or purposes, 6 feet 8 inches remains the standard in various applications, making it the correct answer in this context.