Phoenix’s Accessory Dwelling Unit (ADU) Designers
As Phoenix looks for cost-effective ways to address the housing shortage, accessory dwelling units (ADUs) are emerging as a practical solution for expanding livable space on single-family homes.
These compact housing units—also known as guest houses, prefab accessory dwelling units, or detached accessory dwelling units—create room for a family member, offer extra income potential, or support aging-in-place needs. The growing interest in building an ADU highlights the demand for smart, compliant design that aligns with zoning regulations, building codes, and the daily needs of the primary resident.
As a trusted ADU builder with over 30 years of experience, Third Dimension Design creates accessory dwelling unit designs that make the most of small living spaces. Our team delivers accurate, permit-ready floor plan drafting tailored for accessory dwelling unit construction in Arizona. We optimize each ADU project for energy efficiency, storage, and function without compromising style.
Whether you’re looking for a fully custom plan or assistance with a build-to-permit design, we provide professional guidance at every stage. Schedule a free consultation today to learn what an accessory dwelling unit can offer and how we can help you build ADUs that are both livable and efficient.
Experience the Future of Housing: Tiny Homes vs. Accessory Dwelling Units
As more Americans plan on moving to new and upcoming cities across the country, the opportunity to find affordable and convenient housing has become dismal. Thankfully, the city of Phoenix now allows accessory dwelling units, commonly known as guesthouses, to be added to existing properties with single-family homes. Accessory Dwelling Units (ADUs) are either attached to or detached from the main residence and connected to the utilities of the primary dwelling. These can include converted sheds or barns, above-garage apartments, or basement conversions.
In contrast, tiny homes are structures under 600 sq. ft. that reside on a piece of property or land. Designed to maximize space and minimize living expenses, tiny homes can be used as primary residences, vacation homes, or guest houses.
The best part is that they are completely customizable and can be relocated from place to place. Regardless of your preference, Third Dimension Design has the knowledge and expertise to design a blueprint for your tiny home or ADU.
Tiny homes and accessory dwelling units can be a viable solution to your lack of space or need for additional income. With our detailed blueprints and design capabilities, you can create a space with the entire neighborhood talking. Send us your contact information today, and we’ll contact you shortly to schedule a free design consultation.
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Accessory Dwelling Unit Contractors FAQs
Creating a personalized ADU or tiny home can be an exciting adventure, but it often comes with questions, especially in an area like Phoenix, where the laws and regulations surrounding these dwellings are still evolving.
At Third Dimension Design, we’re familiar with blueprint creation for your ADU and are here to answer all your questions. Take a look at our most frequently asked questions, and contact us today if you have additional inquiries about our drafting and design services.
Yes, of course! Third Dimension Design’s blueprint services don’t stop once the basic design is created. We can turn your idea into a 3D rendering, giving you access to endless possibilities. Experiment with light fixtures, flooring options, paint samples, and furniture configurations to make sure the space is exactly how you imagined it.
We’re here to walk you through every single step of the design process, including where to begin. When you contact us to schedule a free design consultation, we’ll come out to your property (or desired location of the ADU build) and discuss your wants, needs, and budget. Once we have a clear understanding of what you’re looking for, we can begin the design process, where you’ll remain informed with updates along the way.
To learn more about starting your design project, visit our process page.
Easily: you leave it to us. Just as your contractors will perform the heavy lifting during the build-out phase, we’ll do all the heavy lifting regarding city approval. Once you’ve given us the go-ahead on your design, we’ll send it to the city to review and come back with any necessary revisions. After we’ve addressed all the revisions and reconstructed your blueprint, the city will grant you permit access to start construction.
Effective accessory dwelling unit floor plans include more than just square footage—they need to account for layout efficiency, utility access, and Arizona’s local building code. A strong floor plan balances privacy, functionality, and storage while ensuring clear access between the living, kitchen, and bathroom areas.
Our team considers lot size, required setbacks, and the intended use of the accessory dwelling unit (ADU) to develop floor plans that support the long-term value of your property. Whether the ADU is for a family member, short-term rental, or private office, we align every design with your goals and local zoning requirements.
The timeline for ADU construction varies depending on design complexity, permitting, and site conditions, but most projects take between 3 to 6 months once permits are approved. Pre-construction steps—like architectural drafting, engineering, and permitting—can take several weeks before building begins.
We streamline the design process by preparing accurate, code-compliant plans and coordinating with your preferred accessory dwelling unit contractor. This ensures a smooth transition into construction and minimizes costly delays. Our goal is to keep your project on track without compromising quality or compliance.
Architectural Drafting Experts You Can Rely On
We’re here to define every line of your design.
Customized Designs for Your Accessory Dwelling Unit
Just because you’re downsizing doesn’t mean you have to compromise on aesthetics and functionality. Third Dimension Design can create a blueprint or 3D rendering of your tiny house or ADU with finesse and accuracy.
From planning out hidden storage cabinets and reworking sleeping arrangements to factoring in eco-friendly accessories and mapping out proper furniture sizes, we can do it all. As you plan your next rental property venture, consider partnering with a team of drafting and design specialists who know how to bring your ideas to life.
