The city’s code defines and regulates chassis-mounted and foundation-attached tiny houses as a distinct type of dwelling. Its definition for “tiny house” stipulates that units may be either chassis-mounted or attached to a foundation, provided they are less than 400 ft2 (§1-3-1). The city’s building code clarifies that tiny houses require a building permit and compliance with recreational vehicle or mobile home manufacturer association standards for chassis-mounted units and compliance with the international residential code for foundation-attached units (§4-1-1.F).