Tackling Arizona’s Housing Crisis with Casitas: What You Need to Know
If you’re looking for information on building custom home with attached casita restrictions arizona, you’re in the right place. Here are the main points you need to know:
- Casitas and ADUs are small, independent living units that can be attached or detached from your main property.
- The Arizona Senate recently passed legislation to make building casitas easier across cities with populations over 75,000.
- There are specific restrictions and regulations on size, parking, and design that you need to follow. These rules aim to balance the housing shortage needs with community standards.
The process of tackling Arizona’s housing crisis has pushed lawmakers to explore innovative solutions like accessory dwelling units (ADUs). Known by various names such as casitas, guest houses, or granny flats, these structures offer independent living spaces that can help alleviate the housing crunch.
“Casitas are a natural affordable tool to bring supply onboard,” said Sen. Anna Hernandez, D-Phoenix. These smaller dwellings have the potential to address the rising costs of housing, especially for multi-generational families.
I’m Richard Garrett. With over 20 years in construction, I’ve helped numerous clients steer the complexities of building custom home with attached casita restrictions arizona. From understanding zoning laws to securing permits, I’ve seen it all and can guide you through a seamless building experience.
Let’s dig deeper into the fascinating world of casitas and ADUs!
What is a Casita and How Does it Differ from an ADU?
A casita is a small, self-contained living unit that can be either attached to or detached from a main home. Often referred to as guest houses, granny flats, or mother-in-law suites, casitas typically include a kitchen, bathroom, living area, and sleeping quarters. They are designed to offer an independent living space, separate from the primary residence.
Size Limitations
Casitas can vary in size, but they are generally smaller than the main house. They can range from 150 square feet to 1,200 square feet, depending on local zoning laws and lot size. This flexibility makes them a versatile solution for various housing needs.
Traditional Uses
Traditionally, casitas have been used to house:
- Aging parents or other family members
- Guests visiting for extended periods
- Adult children who need a temporary living space
- Rental units to generate additional income
ADU vs. Casita
While the terms Accessory Dwelling Unit (ADU) and casita are often used interchangeably, there are some key differences:
- ADU is a broader term that encompasses any secondary housing unit on the same property as a primary residence. This can include units built over a garage, basement apartments, or detached structures.
- Casita typically refers to a small, detached or semi-detached unit designed for independent living.
One significant point of differentiation is the legal and regulatory framework. For example, the new Arizona legislation, House Bill 2720, aims to streamline the process for building ADUs, including casitas, across cities with populations over 75,000. This bill mandates that any lot with a single-family home can build at least one attached or detached ADU, simplifying the approval process and reducing restrictions.

Why Choose a Casita?
Casitas offer a practical solution for various housing needs. They provide:
- Affordability: By maximizing existing land use, casitas can be a cost-effective way to add living space.
- Flexibility: Whether used for family, guests, or rental income, casitas offer versatile living arrangements.
- Privacy: These units allow for independent living while still being close to the main home.
In summary, understanding the nuances between a casita and an ADU can help you make informed decisions when planning your custom home project. The new legislation in Arizona makes it easier than ever to add these valuable living spaces to your property.
Ready to dive into the next steps? Let’s explore the new casita law in Arizona and what it means for your building project.
The New Casita Law in Arizona: House Bill 2720
House Bill 2720 represents a significant legislative effort aimed at addressing Arizona’s housing shortage. With over 270,000 housing units needed statewide, this bill seeks to make it easier for homeowners to build Accessory Dwelling Units (ADUs), including casitas, on their properties.
Legislative Effort
The bill passed the Arizona Senate with a 20-10 vote and the House with a 46-14 vote, showcasing bipartisan support. According to Sen. Anna Hernandez, D-Phoenix, the bill is a tool to help cities combat the housing crisis by increasing the supply of affordable housing units.
“This is a tool that we can put in the hands of the cities to allow for product and supply to be brought to our neighborhoods,” Hernandez said.
Housing Shortage
The Arizona Department of Housing reports a shortage of more than 270,000 housing units. This shortage has led to increased homelessness and skyrocketing rental prices. By allowing more casitas and ADUs, the state hopes to alleviate some of these pressures.
ADU Regulations
House Bill 2720 mandates that municipalities with populations of 75,000 or more must adopt regulations allowing any lot with a single-family home to build at least one attached or detached ADU. This includes cities like Phoenix, Scottsdale, Tempe, Mesa, Gilbert, Glendale, Chandler, Queen Creek, Sun Lakes, Guadalupe, Paradise Valley, Apache Junction, Fountain Hills, Windsong, Sun City, Peoria, Surprise, Sun City West, and Goodyear.
The bill also includes several key provisions:
- No Prohibition on Rentals: Cities cannot ban advertising the single-family home or casita as separately-leased long-term rentals.
- No Relatives Requirement: Residents of the casita do not have to be related to those in the main home.
- Minimal Setbacks: Setbacks cannot exceed five feet from the property line.
- Design Flexibility: Casitas do not have to match the exterior design, roof pitch, or finishing materials of the main home.
City Requirements
While the bill aims to streamline the building process, some cities have raised concerns. For instance, the Arizona League of Cities and Towns opposes the bill, arguing it could lead to an increase in short-term rentals, exacerbating the housing shortage. In Maricopa County, 26% of houses are owned by outside investors, making it harder for locals to purchase homes.
Nick Ponder, a lobbyist for the League, highlighted that 20% of housing stock in Sedona and 5% in Scottsdale are short-term rentals. This bill would preempt local ordinances like Phoenix’s, which currently bans the use of casitas as short-term rentals.
“The policies that we pass here today will impact the housing supply,” Ponder said.
Despite opposition, the bill’s proponents believe it will provide much-needed relief to Arizona’s housing market.
Ready to start building your custom home with an attached casita? Next, we’ll walk you through the steps to building a custom home with an attached casita in Arizona.
Steps to Building a Custom Home with an Attached Casita in Arizona
Building a custom home with an attached casita in Arizona involves several key steps. Each step ensures compliance with local regulations and helps you achieve a smooth construction process. Here’s a straightforward guide to get you started:
1. Draft Site Plan
Your first step is to draft a site plan. This plan should include detailed layouts of your property, showing where the main house and the attached casita will be located. You can submit this plan online through the Shape Phoenix webpage, or in person at City Hall. You’ll need an appointment to visit City Hall.
For more details on preparing your site plan, check out the Technical Documents (TRT) page on Phoenix’s planning website.
2. Zoning Review
Once your site plan is ready, the next step is a zoning review. The city will review your plan to ensure it complies with local zoning rules. This step is crucial to avoid any legal issues later on. After the zoning review, the plan moves to the city’s residential counter for further processing.
3. Building Permit
With the zoning review complete, you can now submit your building plan. The residential team will review this plan to confirm that your casita complies with Phoenix’s building codes. Once approved, you’ll receive a building permit, allowing you to start construction.
4. Inspection
During construction, the city will conduct multiple inspections. These inspections ensure that the building process adheres to the approved plans and local building codes. The number of inspections will vary depending on the specifics of your project.
5. Certificate of Occupancy
The final step is obtaining a certificate of occupancy. This certificate is the city’s final sign-off, confirming that your custom home and attached casita are safe and ready for occupancy.
By following these steps, you can steer the complexities of building a custom home with an attached casita in Arizona. Next, we’ll discuss the specific building custom home with attached casita restrictions in Arizona.
Building Custom Home with Attached Casita Restrictions in Arizona
When building a custom home with an attached casita in Arizona, understand the various restrictions and regulations that apply. Here, we’ll break down the key areas you need to be aware of:
Zoning Rules
Zoning regulations dictate what you can build on your property. Each city has different zoning laws, so it’s crucial to check with your local planning department. For instance, in Phoenix, you can now build casitas citywide, but they must comply with specific zoning requirements. Always verify your property’s zoning before starting your project.
Building Codes
Building codes ensure that your construction meets safety and quality standards. These codes cover everything from structural integrity to electrical systems. In Phoenix, for example, your building plan will be reviewed to ensure it complies with local building codes before you receive a permit. Failure to adhere to these codes can result in fines or the need to redo parts of your construction.
Setback Requirements
Setback requirements determine how far your casita must be from property lines and other structures. Arizona’s new legislation requires that casitas have setbacks of no more than five feet from the property line. This rule aims to maximize space utilization while maintaining safety and privacy.
Parking Regulations
Parking can be a significant concern when adding a casita. Some municipalities may require additional parking spaces to accommodate the extra dwelling. However, the new bill in Arizona prohibits cities from demanding extra parking for casitas, making it easier for homeowners to add these units without worrying about parking constraints.
Design Compatibility
Design compatibility ensures that your casita blends well with the existing home and neighborhood. While some cities may have strict guidelines on matching exterior designs, roof pitches, and finishing materials, the new Arizona legislation relaxes these requirements. For example, the bill states that casitas do not need to match the exterior design of the main house, giving homeowners more flexibility in design choices.
By understanding these building custom home with attached casita restrictions in Arizona, you can better steer the construction process and ensure compliance with local regulations.

Next, we’ll explore how to steer the permit process in Phoenix and surrounding areas.
Navigating the Permit Process in Phoenix and Surrounding Areas
Navigating the permit process can seem daunting, but understanding the steps and requirements can make it much smoother. Here’s how to get started in several key cities in Arizona:
Phoenix
In Phoenix, the process begins with drafting a site plan. This plan must be submitted either online via the Shape Phoenix webpage or in person at City Hall. An appointment is required for in-person submissions.
Once submitted, the city will conduct a zoning review to ensure compliance with local zoning rules. After zoning approval, the residential counter will review your building plan to ensure it meets building codes. If everything checks out, you’ll be issued a building permit.
Throughout construction, the city will perform multiple inspections. Finally, a certificate of occupancy will be issued once all inspections are passed.
Scottsdale
In Scottsdale, the permit process is similar. Start by submitting a site plan to the city’s planning department. After zoning and building code reviews, you will receive a building permit. Inspections will follow during construction, culminating in a certificate of occupancy.
Tempe
Tempe requires you to submit your site plan online or at the city’s planning department. Zoning and building code reviews are next, followed by the issuance of a building permit. Inspections will be conducted throughout the construction process.
Mesa
For Mesa, submit your site plan to the planning department for a zoning review. Once approved, your building plan will be reviewed for code compliance. After receiving your building permit, inspections will be conducted, leading to a certificate of occupancy.
Gilbert
In Gilbert, the process involves submitting a site plan for zoning review, followed by a building plan review. After obtaining a building permit, the city will conduct inspections during construction. A certificate of occupancy will be issued upon successful completion of all inspections.
Glendale
Glendale’s process begins with a site plan submission for zoning review. After zoning approval, your building plan will be reviewed. A building permit will be issued, followed by inspections during construction. The final step is obtaining a certificate of occupancy.
Chandler
In Chandler, submit your site plan for a zoning review first. Once approved, your building plan will be reviewed. After receiving a building permit, inspections will be conducted throughout the construction process. A certificate of occupancy will be issued upon completion.
Queen Creek
Queen Creek follows a similar process: submit your site plan, undergo a zoning review, get your building plan reviewed, and receive a building permit. Inspections will take place during construction, and a certificate of occupancy will be issued at the end.
Sun Lakes
Sun Lakes requires a site plan submission for zoning review, followed by a building plan review. Once you have your building permit, inspections will be conducted during construction. A certificate of occupancy will be issued upon successful inspection completion.
Guadalupe
In Guadalupe, the process starts with a site plan submission for zoning review, followed by a building plan review. After obtaining a building permit, the city will conduct inspections during construction. A certificate of occupancy will be issued once all inspections are passed.
Paradise Valley
Paradise Valley’s process involves submitting a site plan for zoning review, followed by a building plan review. After receiving a building permit, inspections will be conducted during construction. A certificate of occupancy will be issued at the end.
Apache Junction
In Apache Junction, submit your site plan for zoning review first. After zoning approval, your building plan will be reviewed. Once you have your building permit, inspections will be conducted throughout the construction process. A certificate of occupancy will be issued upon completion.
Fountain Hills
Fountain Hills requires a site plan submission for zoning review, followed by a building plan review. After obtaining a building permit, the city will conduct inspections during construction. A certificate of occupancy will be issued upon successful inspection completion.
Windsong
Windsong follows a similar process: submit your site plan, undergo a zoning review, get your building plan reviewed, and receive a building permit. Inspections will take place during construction, and a certificate of occupancy will be issued at the end.
Sun City
Sun City’s process begins with a site plan submission for zoning review. After zoning approval, your building plan will be reviewed. A building permit will be issued, followed by inspections during construction. The final step is obtaining a certificate of occupancy.
Peoria
In Peoria, submit your site plan for a zoning review first. Once approved, your building plan will be reviewed. After receiving a building permit, inspections will be conducted throughout the construction process. A certificate of occupancy will be issued upon completion.
Surprise
Surprise requires a site plan submission for zoning review, followed by a building plan review. Once you have your building permit, inspections will be conducted during construction. A certificate of occupancy will be issued upon successful inspection completion.
Sun City West
In Sun City West, the process starts with a site plan submission for zoning review, followed by a building plan review. After obtaining a building permit, the city will conduct inspections during construction. A certificate of occupancy will be issued once all inspections are passed.
Goodyear
Goodyear’s process involves submitting a site plan for zoning review, followed by a building plan review. After receiving a building permit, inspections will be conducted during construction. A certificate of occupancy will be issued at the end.
Navigating the permit process in these cities can be complex, but knowing the steps can help you move through it more smoothly.
Next, we’ll tackle some frequently asked questions about building custom homes with attached casitas in Arizona.
Frequently Asked Questions about Building Custom Homes with Attached Casitas in Arizona
Can I build a casita on my property in Arizona?
Yes, you can build a casita on your property in Arizona. Recent legislation, including House Bill 2720, has made it easier for homeowners to add Accessory Dwelling Units (ADUs) or casitas to their properties. This law aims to address the housing shortage by allowing more flexible housing options. However, you must comply with local zoning rules and building codes. For instance, Phoenix now allows casitas citywide, but you’ll need to follow a specific process including site plan submission, zoning review, and obtaining a building permit.
What are the size limitations for casitas and ADUs?
The size of your casita or ADU can vary based on local regulations. Typically, ADUs can be up to 1,200 square feet, depending on your lot size and local zoning laws. In contrast, tiny homes are much smaller, usually ranging from 100 to 400 square feet. Even the smallest ADUs must include essential living facilities like a kitchen, bathroom, and sleeping area to meet building safety standards. Always check with your local city planning department for specific size limitations in your area.
What are the inspection requirements for building a casita?
Building a casita involves multiple inspections throughout the construction process. The exact number and type of inspections can depend on the specifics of your project. Generally, inspections will check for compliance with building codes and safety standards. This includes electrical, plumbing, and structural inspections. For example, in Phoenix, after your building plan is approved and a permit is issued, the city will conduct several inspections during construction. The final step is obtaining a certificate of occupancy, which confirms that your casita meets all necessary regulations and is safe to inhabit.
Conclusion
Building a custom home with an attached casita in Arizona can be a complex process, but that’s where we come in. At RG ProBuilders, we specialize in making your dream home a reality. With over 15 years of experience, we know the ins and outs of local regulations and are experts in navigating construction complexities.
Personalized Service
Each project is unique, and we treat it that way. From the initial consultation to the final inspection, our team is dedicated to providing personalized service custom to your specific needs. We handle everything—from drafting site plans and securing permits to ensuring compliance with zoning rules and building codes.
Expertise You Can Trust
Our team is well-versed in the latest legislation, including House Bill 2720, which has opened new opportunities for building casitas across Arizona. We stay updated on all local regulations to ensure your project runs smoothly and meets all legal requirements.
Navigating Construction Complexities
Construction projects can be daunting, especially with the various permits, inspections, and regulations involved. We take on the heavy lifting for you. Our experts manage all aspects of the permit process, whether you’re in Phoenix, Scottsdale, Tempe, Mesa, Gilbert, Glendale, Chandler, Queen Creek, Sun Lakes, Guadalupe, Paradise Valley, Apache Junction, Fountain Hills, Windsong, Sun City, Peoria, Surprise, Sun City West, or Goodyear.
Ready to start your project? Contact us today and let’s make your vision come to life. Visit RG ProBuilders to learn more about our services and how we can help you build the perfect custom home with an attached casita.