Modular ADU Costs Range $180-$500 Per Square Foot in 2026
In 2026, modular accessory dwelling units offer an efficient way to expand living space in backyards, with costs between $180 and $500 per square foot. Factors such as unit size, customization levels, and site conditions determine the final price. This guide covers planning essentials, financing paths, and builder selection to optimize value and achieve lasting benefits.

































