ADU builder · Phoenix, AZ

Backyard casitas and ADUs, built for Phoenix lots and Phoenix summers.

Detached casitas, garage conversions, attached ADUs and guest houses. We take care of design, the city permit and the build. Licensed and insured with the Arizona Registrar of Contractors.

Check my lot
Small backyard home (ADU)
Compact kitchen: Bright, modern kitchen with white cabinets and stainless steel appliances
Detached garage: White vehicle near tree

How much does an ADU cost in Phoenix?

As of October 2026, a 2026 Arizona cost guide puts a 600 sq ft detached casita in Phoenix at about $120,000 with basic finishes, roughly $160,000 to $220,000 mid-range, and $330,000 or more high-end. A Phoenix-area builder's July 2026 figures start near $150,000 for conversions. Utilities, permits and your lot move the total.

After a site visit you get a written, itemized quote, so you can see where every dollar goes. Read the Phoenix ADU cost guide.

Which ADUs can you build on a Phoenix lot?

Detached ADU A stand-alone casita in the backyard, with its own entry, bath and kitchen if you want one. Garage conversion Reuse the slab and walls you already own. Phoenix asks you to replace the lost parking. Attached ADU A unit joined to the house, with a separate entrance and its own living space. Casita or guest house Rentable ADU or family-only guest house: the label changes the rules.

Design and permits are part of every build; see how that works. As of October 2026, Phoenix allows two ADUs on most single-family lots. See the Phoenix ADU rules.

What are the steps?

  1. Step 1Lot checkZoning, lot coverage, easements and HOA status.
  2. Step 2Site visitMeasurements, utilities, access, then your quote.
  3. Step 3Design and permitPlans, engineering and the city review.
  4. Step 4BuildFraming to final, inspections included.

Walk through the full process.

Where do we build?

The City of Phoenix and four neighbors. Arizona's ADU law covers the larger cities, but each one wrote its own ordinance, and Paradise Valley is small enough to sit outside the state mandate.

ScottsdaleA pre-application meeting comes before any ADU permit.ADUs in Scottsdale TempeA city design competition for pre-approved casita plans.ADUs in Tempe GlendalePublished fee estimates and separate utility meters.ADUs in Glendale Paradise ValleyAcre-sized lots, hillside rules, town-set standards.ADUs in Paradise Valley

Every service area, including the City of Phoenix.

What can you build on your lot?

Send your address. We look up zoning, lot coverage and any HOA before we talk design. The lot check is free. We work in Phoenix, Scottsdale, Tempe, Glendale and Paradise Valley.

Questions Phoenix homeowners ask

How much does an ADU cost in Phoenix? What are the ADU rules in Phoenix in 2026? Can my HOA stop me from building an ADU in Phoenix? How much rent can an ADU make in Phoenix? Can I use my ADU as a short-term rental in Phoenix? How do I keep an ADU cool in the Phoenix heat?