Phoenix, AZ
Garage conversion plans in Phoenix, AZ
Converting an existing garage is usually the cheapest way to add a rentable unit: the slab, walls, and roof already exist, so budgets typically run well under a detached new build. The make-or-break checks are ceiling height (7 ft minimum for habitable rooms), slab condition, and how far utilities have to travel.
ADU and small-dwelling rules vary by city — check local zoning, setbacks, and permit requirements before building. Several states now require streamlined ADU review; your local planning department is the authority.
What a 400 sq ft unit rents for around Phoenix
$1,140–$1,780/mo long-term · $110–$200/night short-term
Rough metro bands — an estimate, not advice. Run your own numbers.
Plans that fit this project
Garage conversion 20×20
400 sq ft · 0 bed · 1 bath
Garage conversion 24×24
576 sq ft · 1 bed · 1 bath
Garage conversion 12×22
264 sq ft · 0 bed · 1 bath
Plans are design starting points checked against 2021 IRC geometry rules — not permit documents. Local codes and objective standards in Phoenix govern; confirm with your building department or a licensed professional.