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Exploring the Different Types of Accessory Dwelling Units (ADUs)

Exploring the Different Types of Accessory Dwelling Units (ADUs)

Accessory Dwelling Units (ADUs) have become a sought-after addition to residential properties across Arizona. These self-contained living spaces offer a practical, stylish solution for growing families, aging relatives, or even short-term rental income. In places like Tucson and Phoenix, where lot sizes and privacy often allow for additional construction, ADUs are more than a trend—they’re a strategic investment.

So what type of ADU is right for your property? At CactusNectar LLC, we specialize in building elegant, functional casitas and guest homes tailored to your specific needs. Below, we explore the most common types of ADUs and how each can enhance your home and lifestyle.

Detached Casitas: Privacy and Flexibility

Detached ADUs, often referred to as casitas or guest houses, are fully independent units separated from the main residence. In Arizona, these are particularly popular for homeowners who want to maintain privacy while accommodating family, caregivers, or tenants. These units can be built with full kitchens, private bathrooms, and even dedicated living spaces—essentially functioning as a miniature home.

Because of their separation from the primary residence, detached casitas are ideal for short-term rental platforms or multigenerational living. They offer independence to guests or family members while still keeping them close. At CactusNectar, our team offers several customizable layouts to suit various property sizes and uses.

Attached ADUs: Connected Convenience

Attached units share at least one wall with the main home but feature a private entrance. These spaces strike a balance between independence and accessibility. They're often designed with a smaller footprint but still offer a complete living experience, typically including a bedroom, bathroom, and kitchenette.

For families caring for elderly parents or college-age children, attached ADUs provide the comfort of closeness without sacrificing privacy. They can also be a practical solution for homeowners who want to avoid expanding beyond their existing lot coverage.

Garage Conversions: Efficient Use of Existing Space

Garage conversions are a cost-effective way to create a fully functioning ADU using existing square footage. By transforming a garage into a livable space, homeowners avoid the need for major structural changes or additional foundation work. These units are typically studio-style layouts and can include a bathroom, small kitchen, and open-concept living/sleeping area.

While zoning and permitting requirements vary, CactusNectar LLC handles every detail—from design and city approvals to the final build—ensuring your converted space meets local codes and your vision.

Above-Garage Suites: Smart Vertical Expansion

If expanding outward isn't an option, building above the garage is a clever way to add livable space without compromising your yard. These types of ADUs are ideal for properties with smaller footprints but offer room to build upward. Above-garage units can serve as rental properties, guest quarters, or private studios, depending on your goals.

Our team works closely with homeowners to ensure the design complements the main residence and enhances overall curb appeal. With the right layout and high-end finishes, an above-garage suite can become a seamless extension of your home.

Interior Conversions: Underutilized Space, Reimagined

Interior conversions, such as basement or attic ADUs, are less common in Arizona due to architectural and climate factors. However, some homes may have unused internal areas that can be reconfigured into a secondary living space. These types of ADUs are typically the most integrated with the main home, making them suitable for family members who require close proximity or for repurposing underused rooms.

While limited in Arizona, interior conversions can still be a viable option for certain properties—especially when expertly designed for comfort, accessibility, and code compliance.

Tailored Features to Meet Unique Needs

Not all ADUs are created equal, and the features you include can significantly influence how the space functions. For some, a kitchenette may be sufficient, while others may require a full chef’s kitchen for long-term guests or renters. Likewise, the inclusion of ADA-compliant elements such as wider doorways, no-step entries, and grab bars might be necessary for elderly family members.

CactusNectar LLC offers four unique casita layouts that can be tailored with everything from built-in storage to smart home technology. Whether you're aiming for a cozy guest retreat or a fully autonomous rental unit, our design-build team ensures your ADU complements your lifestyle.

Explore our thoughtfully designed casita layouts, available on the main service page here, to see how each option can be tailored to your needs.

Choosing the Right Type of ADU for Your Property

Several factors go into deciding which type of ADU will work best for your property. Lot size, existing structures, local zoning laws, and intended use all play a role. For homeowners in Tucson and Phoenix, regulations can differ from neighborhood to neighborhood, which is why working with a local builder experienced in regional requirements is crucial.

Before beginning any project, CactusNectar LLC conducts a comprehensive property evaluation and consultation to determine the best course of action. We help you navigate permits, architectural plans, and finish selections to bring your vision to life without unnecessary delays or surprises.

Have more questions? Our comprehensive FAQ section on the Casitas page covers everything from zoning to design features—visit it to learn more before getting started.

Why Partner with CactusNectar LLC

As an established name in the Arizona construction industry, CactusNectar LLC brings over a decade of expertise to every ADU project. We understand the nuances of desert architecture and offer solutions that reflect both form and function. Our casitas are designed to blend seamlessly with your main home, add lasting value, and elevate how you live.

From the initial concept to the final walkthrough, we manage every step with professionalism, clear communication, and craftsmanship that meets the highest standards. With service areas spanning Tucson, Phoenix, Scottsdale, Chandler, Gilbert, Mesa, and beyond, we’re proud to be Arizona’s trusted casita builder.

Final Thoughts

Whether you're planning to accommodate family, generate income, or simply expand your home’s potential, an ADU offers versatile solutions tailored to your goals. With CactusNectar LLC, you gain a partner who brings vision, expertise, and precision to every build.

Start exploring your ADU options today. Visit our Guest Homes & Casitas service page to learn more.

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