Adu company — Tempe, AZ | AccessoryDwellingUnit Services

Looking for adu company in Tempe, AZ? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Tempe and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

A professional company handles the heavy lifting, including architecture, engineering, permit submittals, and the actual construction labor. You need an experienced team when you want to ensure your unit is built to code, structurally sound, and completed on a predictable schedule. We act as your single point of contact, coordinating every trade and inspection so you aren't managing subcontractors yourself. We provide professional oversight from start to finish. Exact pricing confirmed free on the call.

Frequently asked in Tempe

What are the disadvantages of ADUs in Tempe?

While ADUs offer many advantages, potential disadvantages in Tempe might include increased utility costs and the need for adequate parking. It's also important to consider how the new structure will integrate with your existing home and the neighborhood's aesthetic. A professional can help you navigate these concerns.

How much does an ADU cost in Arizona?

The cost of an ADU in Arizona, including Tempe, varies considerably. Factors like the unit's square footage, the quality of materials selected, and any necessary site modifications significantly influence the final price. Getting a personalized quote is the best way to understand the specific investment required.

What are the rules for ADUs in Arizona?

Arizona has state laws that generally support ADU development, and Tempe also has its own specific zoning ordinances. These rules often address aspects such as minimum lot size, setbacks, and parking requirements. Familiarizing yourself with both state and city regulations is essential. Local pros are experts in this.

Is an ADU allowed in Tempe?

Yes, ADUs are generally allowed in Tempe, provided they comply with both state ADU laws and the city's specific zoning ordinances. Tempe has been working to facilitate ADU construction for homeowners. Ensuring your proposed unit meets all applicable building codes and zoning requirements is the critical first step.

However, it's worth exploring if there are any current local or state-level incentives or financing options available for ADU construction in Arizona. We can help you find relevant information.

What are the parking requirements for ADUs in Tempe?

Tempe has specific parking requirements for ADUs, which are designed to ensure adequate off-street parking is available. These regulations can vary depending on the size and type of ADU. Consulting with a local building professional will help you understand and meet these requirements for your project.

Also serving nearby: Chandler · Gilbert · Mesa · Phoenix · Glendale

All cities in Arizona →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

189,834residents

4,748per sq mile

8ZIP codes served

Serving all of Tempe — population 189,834; about 4,748 residents per square mile across 40.0 sq mi. ZIP codes covered include 85280, 85281, 85282, 85283, 85284, 85285, 85287, 85288.

Neighborhoods served in Tempe: Tempe South, Warner Ranch, The Lakes, Broadway Corridor, Papago Park Area — and every surrounding area.