Building new opportunities in your backyard.
Thoughtfully designed, expertly crafted accessory dwelling units (ADU) built to expand your lifestyle and property value in the Greater Phoenix Valley. From custom guest houses to backyard casitas, we handle everything—from the first call to the final walk-through.
Why Build an ADU?
Designed for Family, Built for Investment
The housing landscape in Arizona has changed. In 2026, homeowners are looking for more than just extra space—they are looking for solutions. At AZ ADU, we specialize in:
-
Backyard Casitas: Perfect as a private guest retreat or high-end pool house.
-
Multigenerational Living: Create a private, accessible mother-in-law suite that keeps your family close while maintaining everyone’s independence.
-
Modern Home Offices: A quiet, professional workspace steps away from your main door.
-
Passive Rental Income: Take advantage of the 2026 Arizona rental market. Our detached guest houses are designed as premium long-term or short-term rentals to help offset your mortgage.
Our Most Popular Plans
Rapid Permitting. Proven Quality. Move-in Ready.
At AZ ADU, we offer a curated collection of modern ADU floor plans pre-approved for the City of Phoenix. By choosing one of our signature designs, you bypass months of architectural back-and-forth and move straight to the front of the permitting line.
Chameleon
The Chameleon: Ideal for high-yield short-term rentals, professional home offices, or additional recreational space.
Bed
Studio
Bath
1
Total Square Footage
400
*permit ready - City of Phoenix
Bisbee
The Bisbee: A masterclass in efficiency, providing fully independent living for family, guests, or long-term tenants.
Bed
1
Bath
1
Total Square Footage
480
*permit ready - City of Phoenix
Camelback
The Camelback: With elevated architectural style and expanded living areas, this unit combines efficiency and sophistication
Bed
1
Bath
1
Total Square Footage
756
*permit ready - City of Phoenix
View All of Our Pre-Approved Plans
Ready to Start?
Our Proven Process
From Concept to Casita in 4 Easy Phases
We manage the complexity so you can enjoy the results. Our turnkey process is designed for transparency and speed.
Phase 1: Discovery & Site Visit (Week 1-2):
We begin with an introductory call to discuss your goals, followed by an on-site evaluation of utility connections and 2026 zoning eligibility. From there we will provide a Comprehensive Proposal outlining the project budget.
Phase 2: Permitting & Approvals (Month 1-3):
Upon signing of the proposal, using our pre-approved designs, we submit your plan and handle every interaction with the Planning & Development Department.
Phase 3: Groundbreaking & Construction (Month 4-7):
Our expert builders manage everything from foundation to desert-rated finishes. We manage our builders and contractors so there is no extra work for you. A truly turn-key experience.
Phase 4: Final Inspection & Move-In (Month 8):
We complete inspections, receive the Certificate of Occupancy, and hand over the keys.
Navigating 2026 Arizona ADU Laws
Your Right to Build is Now Protected
Building a backyard unit in Arizona used to be a maze of local red tape. That changed in 2025 with the passage of HB 2720, better known as the “Casita Bill.” Moving forward to January 2026, new state-wide mandates like HB 2928 have streamlined the process, allowing homeowners in Phoenix and across Maricopa County to build "by-right”.
Now, in 2026, building a casita is easier than ever—if you have the right partner. At AZ ADU, we handle the entire building process, starting with the permit from your local municipality to ensure your unit is 100% compliant with 2026 Arizona building codes.
Built by Arizona Experts
AZ-ADU, your trusted ADU Partner
With a passion for construction, a commitment to excellence, an eye for design, Tom Mulhern, Pat Moroney, and Luke Bevans have decades of industry experience and will take you on a seamless journey from permit to build.
AZ ADU | Licensed General Contractor ROC 351233
