Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
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Frequently asked in Phoenix
What are the disadvantages of ADUs in Phoenix?
One consideration is the potential for increased property taxes and utility costs associated with an ADU. You'll also need to ensure compliance with Phoenix's specific zoning and building codes, which can be detailed. Neighbor relations and parking requirements are other factors to manage. Pros can help mitigate these.
How much does an ADU cost in Phoenix?
The cost of an ADU in Phoenix varies greatly. It's influenced by the unit's size, the complexity of the design, and the quality of finishes selected. Site preparation, foundation work, and any necessary utility connections will also impact the final price. Call us for a personalized estimate.
What are the rules for ADUs in Phoenix?
Phoenix has specific regulations for ADUs, including requirements for lot size, setbacks, and ensuring the ADU is subordinate to the primary residence. You must adhere to city zoning ordinances and building codes. Understanding these rules is crucial for a successful build. Pros are familiar with these.
Is an ADU allowed in Phoenix?
Yes, ADUs are permitted in Phoenix, as long as they meet the city's zoning and building code requirements. The city supports ADUs as a way to provide more housing options. Your property's zoning and lot characteristics will determine eligibility. A quick call can confirm your property's potential.
What permits are needed for an ADU in Phoenix?
You will need to obtain building permits from the City of Phoenix Planning and Development Department. This typically includes a building permit, and potentially separate permits for electrical, plumbing, and mechanical work. Adhering to all city regulations is essential for approval.
Also serving nearby: Glendale · Scottsdale · Tempe · Peoria · Surprise
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Phoenix — population 1,650,070; about 3,183 residents per square mile across 518.3 sq mi. ZIP codes covered include 85001, 85002, 85003, 85004, 85005, 85006, 85007, 85008.
Neighborhoods served in Phoenix: Arcadia, Camelback East, Downtown Phoenix, North Mountain, Ahwatukee — and every surrounding area.
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