The most consequential housing policy in Boise right now is happening in backyards. Accessory dwelling units — the small secondary homes tucked behind or above existing houses — have become an unlikely and surprisingly popular front in the city's fight over affordability and density.
Their appeal is broad in a way that few housing measures manage. Homeowners see a source of rental income or a place for aging parents; housing advocates see gentle density that adds units without transforming neighborhood character; even skeptics of larger apartment projects often find the modest scale of an ADU tolerable. The result is a rare near-consensus in a bitterly divided debate.
Boise has moved to make the units easier to build, streamlining permits and loosening restrictions that once made them impractical. The response has been enthusiastic, with applications climbing steadily as homeowners discover the economics work.
No one pretends ADUs alone will solve Idaho's housing shortage; the numbers are too small for that. But as a politically achievable step that adds real units while sidestepping the fiercest density battles, the backyard revolution has become a model of what incremental progress can look like.
