Tres Birds uses timber and metal to create ADU alongside Boulder home

Smart systems and salvaged materials feature in an accessory dwelling unit by architecture firm Tres Birds that city officials have designated as low-cost housing.
The project is located in Boulder, which sits in the foothills of the Rocky Mountains and is home to a major university and growing tech industry.
The ADU is in the foothills of the Rocky Mountains
Built on a 2,100-square-foot (195-square-metre) property with a single-family home, the detached accessory dwelling unit (ADU) i