Sustainable Design Build

Many Denver homeowners are surprised to learn that building an Accessory Dwelling Unit (ADU) often requires a full concrete foundation instead of a simple slab. While slabs can work for garages and sheds, habitable ADUs typically require deeper structural support, frost protection, utilities integration, and compliance with Denver building codes. This becomes especially important during garage conversion ADU projects, where the existing slab may not meet structural or insulation requirements for legal residential living space.

Why ADUs in Denver Need a Real Foundation Many Denver homeowners are surprised to learn that building an Accessory Dwelling Unit (ADU) often requires a full concrete foundation instead of a simple slab.