As housing needs evolve across Maricopa County, homeowners and buyers are exploring creative ways to maximize property value, increase housing options, and accommodate multi-generational living. One increasingly popular solution is the Accessory Dwelling Unit, commonly referred to as an ADU.
What is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary housing unit built on the same lot as a primary residence. These units are self-contained, with their own kitchens, bathrooms, and sleeping areas. ADUs can be attached to the main home (such as a converted garage or basement) or detached as standalone structures like guest houses or backyard cottages.
ADUs Legalized in Phoenix and Arizona:
In September 2023, the Phoenix City Council approved an ordinance permitting ADUs—commonly known as casitas or backyard homes—across most single-family residential zones. This move aimed to address the city's housing shortage by allowing homeowners to add secondary units to their properties.
Building on this local initiative, the Arizona State Legislature passed the House Bill 2720, known as the "casita bill," in early 2024. This legislation requires cities with populations over 75,000 to allow ADUs in areas zoned for single-family homes, further promoting housing flexibility statewide.
Common Types of ADUs in Maricopa County:
- Detached ADU – A freestanding structure separate from the main house, often built in the backyard.
- Attached ADU – An addition to the existing home, such as a converted garage or basement with its own entrance.
- Above-Garage ADU – A unit constructed above a garage, offering efficient use of space.
- Internal ADU – A portion of the main house (like a separate wing or lower level) retrofitted to be an independent living space.
Benefits of ADUs:
- Increased Property Value: Adding an ADU can enhance the value of your property by offering additional livable square footage.
- Rental Income Potential: ADUs can be rented out for additional income, providing financial flexibility to homeowners.
- Multi-Generational Living: ADUs are ideal for families needing space for aging parents, adult children, or long-term guests while maintaining privacy.
- Efficient Use of Land: They make use of existing lot space without requiring major infrastructure changes.
What to Know About Building an ADU in Maricopa County:
Before constructing an ADU, it’s important to consult local zoning laws and building codes. Regulations vary by city and may dictate setbacks, height limits, parking requirements, and occupancy rules. Permitting is required, and working with a knowledgeable contractor or real estate professional can streamline the process.
Final Thoughts:
Accessory Dwelling Units are a smart and versatile solution to modern housing challenges. Whether you're a homeowner looking to expand living space or a buyer interested in properties with income potential, ADUs offer flexibility, value, and functionality.
If you're considering buying a property with an ADU or building one on your current lot in Maricopa County, our team is here to help you navigate zoning, permits, and market trends. Let us help you make the most of your real estate investment.