Unique housing solutions for your Backyard

We can help you with the DESIGN or CONSTRUCTION



An Accessory Dwelling Unit, abbreviated as ADU, refers to an extra residential space located on your property, typically situated in your backyard. ADUs have gained popularity as home extensions due to their flexibility in customization to suit your specific requirements.

In September 2023, the Phoenix City Council approved new rules to allow one ADU in all single-family residential properties for which the yard size and other parcel characteristics make them permissible. Prior to that approval, it wasn’t allowed to add an ADU, unless the zoning was for Now, you can build an ADU in the back of your home even if the zoning is for a single-family only

There are some regulations that need to be applied to an ADU.

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Pick the ideal design for your backyard

A Studio with 430 sq. ft.

One Bedroom + Bath with 584 sq. ft.

One Bedroom + Bath with 640sq. ft.

One Bedroom + Bath with 644 sq. ft.

Two Bedroom + Bath with 770 sq. ft.

Two Bedroom + Bath with 851 sq. ft.


Mature Woman Working in Home Office in Container House in Backyard, Resting.


At SECONDHOME, we specialize in crafting distinctive and functional accessory dwelling units (ADUs or CASTAS) that not only expand your living space but also elevate your lifestyle. Our passion lies in creating unique ADU solutions tailored to your individual needs and the character of your property.

ADUs are more than just additional structures; they're opportunities for innovation, versatility, and modern living. At SECONDHOME, we understand this, and our mission is to help you unlock the full potential of your property while enhancing its value and utility.

What makes us stand out is our commitment to innovation and design. We don't believe in cookie-cutter solutions. Instead, we collaborate closely with our clients to create ADUs that reflect their unique style and requirements. Whether you envision a cozy guest cottage, a spacious home office, a comfortable granny flat, or any other creative living space, we have the expertise to turn your dreams into reality.

We prioritize quality and sustainability in every aspect of our work. Our team of skilled architects, builders, and designers employs cutting-edge construction techniques and environmentally friendly materials to ensure that your ADU not only meets your needs but also aligns with a greener future.

At SECONDHOME, we believe in the transformative power of ADUs / CASITAS. They can provide additional income, accommodate family members, or simply expand your living space. Our goal is to make the process of adding an ADU to your property a seamless and enjoyable experience.

Let us help you create a unique ADU that reflects your personality and enhances your lifestyle. Contact SECONDHOME today, and let's embark on a journey to unlock the potential of your property through our distinctive ADU solutions."

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Studio with 423 sq. ft.

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One Bedroom + One Bath with 586 sq. ft.

Detached house on architect blueprints

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One Bedroom + One Bath with 640 sq. ft.

Detached house on architect blueprints

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One Bedroom + One Bath with 644 sq. ft.


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Two Bedroom + One Bath with 770 sq. ft.

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Two Bedroom + One Bath with 851 sq. ft.

Detached house on architect blueprints

Construction Documents

Civil Engineer work

Structural Fees

Site Preparation

Permit Fees

Building Construction

Cost to Consider to build an ADU

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Meeting with SECONHOME Staff, In the consultation phase, you'll initiate your ADU project by gathering information and expert advice. This includes:

- **Research and Local Regulations:** Start by researching local zoning laws and regulations regarding ADUs. Consult with your local municipality or planning department to understand the specific requirements in your area.

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Once you have a rough idea of the project's scope and cost, you'll focus on securing financing:

- **Explore Financing Options:** Research and explore financing options, such as personal savings, loans, grants, or incentives available for ADU construction. Choose the option that best suits your financial situation

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The site visit involves evaluating your property to identify the best location for the ADU and assess its suitability:

SecondHome’s staff will visit your property to assess its conditions, utilities, access points, and any potential challenges.

Together with your consultant, select the ideal location for the ADU on your property, considering factors like existing structures and landscaping.

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This phase is about creating the ADU's design and layout:

SECONHOME has some design options, pre-approved by CIty of Phoenix Work. Saving our clients a lot of time and money. We also could customize options that meet your needs and preferences.

If you need a custom Design, SECONHOME will generate the necessary's Construction Documents required by the Municipality and will submit submited **Blueprints and Plans:** Once you've finalized the design, your consultant will create detailed blueprints and plans that adhere to local building codes and regulations.

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Before construction begins, obtain the necessary permits and approvals:

- **Permit Applications:** With the help of your consultant, prepare and submit the required permit applications to your local authorities.

- **Approval Process:** Work with the permitting department to address any questions or modifications needed for permit approval.

Once you have the permits and financing in place, construction can commence:

- **Site Preparation:** Clear the designated area, if needed, and prepare the site for construction.

- **Construction Stages:** The builder will follow the construction plan, from foundation to framing, utilities, and interior work.

- **Inspections:** Local building inspectors will visit periodically to ensure the construction meets safety and code requirements.

- **Finalization:** After inspections are passed, the ADU is completed, and final touches, such as landscaping or interior finishing, are done.

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Outdoor String Lights Hanging on a Line in Backyard.

Mailing Address

60 east mitchell drive, phoenix arizona 85012

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