Number 1: Sca Design
on GoogleLas Vegas, NV
(702) 719-2020 2140 E Pebble Rd #140, Las Vegas, NV 89123
ADU builders in Phoenix
The 10 ADU builders from Google's results for Phoenix, Arizona, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
- Garage conversion ADU
- $56,000 – $139,500existing structure
- Detached ADU
- $139,500 – $372,000new build, utilities
- Prefab ADU
- $111,500 – $279,000unit, foundation, install
- Phoenix vs US
- -7%below the US median
Licensing in Arizona. Arizona contractors need a license from the Registrar of Contractors (ROC), and the ROC lookup shows complaints as well as status.
Number 2: Pro Lific Builders
on GooglePhoenix
Prolific Builders is a Phoenix custom home builder that also constructs accessory dwelling units. It takes ADU projects from concept to completion for homeowners adding a rental unit, space for family members or a separate living area on an existing residential lot.
Number 3: AZ ADU
on GooglePhoenix, AZ
AZ ADU builds backyard guest houses, casitas and accessory dwelling units in Phoenix. Its completed projects range from modern farmhouse exteriors to finished interiors with full kitchens, giving homeowners a separate living space on their existing lot.
(602) 757-9294 645 E Missouri Ave #250, Phoenix, AZ 85012
Number 4: Superior Custom ADU and Casita Builders in Arizona
on GoogleGilbert, AZ
A Gilbert, Arizona contractor handling bathroom remodels in the Phoenix area as well as ADU construction.
(480) 725-3001 1135 N McQueen Rd Ste 131, Gilbert, AZ 85233
Number 5: ADU Cost in Phoenix, AZ
on GoogleScottsdale, AZ
From Scottsdale, Minimal Living Concepts sells turnkey ADU models for Phoenix-area lots. The range runs from the 322-square-foot Flex to the 1,178-square-foot Dwell, and the company explains what each package includes and what changes the final cost.
(623) 343-0024 8280 E Gelding Dr Ste 104, Scottsdale, AZ 85260
Number 6: ADU Innovators
on GooglePhoenix, AZ
ADU Innovators designs and builds custom casitas and backyard units in the Phoenix area, including Scottsdale, Goodyear and Mesa. Projects are planned to meet Arizona's HB 2720 rules on attached and detached accessory dwelling units.
(623) 294-2855 3110 N Central Ave Suite D-160, Phoenix, AZ 85012
Number 7: Design and Remodeling Team
on GoogleScottsdale, AZ
Operating as Hochuli Design, this Scottsdale design-build firm remodels kitchens for homeowners across the Phoenix metro area. Kitchen design and construction stay with one team rather than being split between separate companies, and the firm also builds accessory dwelling units.
(602) 451-0323 2501 Hayden Rd Ste 102, Scottsdale, AZ 85257
Number 8: Phoenix ADU Construction Contractor & Builder
on GooglePhoenix, AZ
Valleywide Dig and Haul handles basement excavation across the Phoenix Valley, including digging for new basements along with basement slabs and footings. The company works with subcontractors and suppliers to source materials for basement additions.
(623) 267-9335 14435 N 7th St #300A, Phoenix, AZ 85022
Number 9: Az-ADU
Phoenix
Az-ADU builds accessory dwelling units in the Phoenix area.
Number 10: Prime Builder Az
Phoenix
Prime Builders AZ designs, permits and builds ADUs across the Phoenix Valley, including Mesa, Gilbert and Glendale. Its range covers casitas, pool houses, guest houses and converted garages, offered as set models handled by one team, and the company also works as a general contractor.
What ADU builders charge in Phoenix
In Phoenix, a garage conversion ADU typically costs $56,000 – $139,500. Remodeling labor in Phoenix runs about 7% below the US median, which accounts for most of the difference from the same project elsewhere.
How to choose between them
- Check the license yourself. Where Arizona or Phoenix licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
- Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
- Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
- Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.
How this list is ordered
These are the firms from Google's results for "adu builders phoenix", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
ADU builders in Phoenix: common questions
Can I build an ADU on my lot?
It depends on your city and state. California, Oregon and Washington have state laws that make ADUs allowed on most single-family lots. Elsewhere it is set by local zoning, so check lot size, setback and owner-occupancy rules with your city first.