Although accessible housing has been cast in many forms, accessory dwelling units (ADUs) have been a catalyst for including architects in direct policy development. For the first time, cities are directly contracting with architects to provide designs for private property through pre-approved ADU programs. Small Infrastructures is an exhibition of ADU designs that uses the economics of building assembly as the groundwork for experimentation. Ten architects teaching at Harvard GSD and Berkeley CED consider the overlaps between academia, where cost is often external to conceptual work, and practice, where budgeting is an integral task.