Accessory Dwelling Units (ADUs)

Many homeowners are looking for ways to create more usable space without buying a larger home. An Accessory Dwelling Unit (ADU) offers a flexible solution for growing families, aging parents, long-term guests, rental opportunities, or a private home office.
At ArcDesign, we help turn your ideas into permit-ready plans with custom ADU designs tailored to your property and local building requirements. From the initial layout to construction drawings, our team works with you every step of the way to create a space that's functional, attractive, and built for the way you live.
Add More Living Space Without Moving
Whether you need a private space for family, a guest house, a home office, or rental income, an Accessory Dwelling Unit (ADU) can be a smart investment in your property.

At ArcDesign, we design custom ADUs and create permit-ready drawings that help move your project from idea to construction. Our team works with homeowners throughout the Tampa Bay area to create functional, attractive living spaces that fit their property, budget, and lifestyle.
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What Is an Accessory Dwelling Unit (ADU)?
An Accessory Dwelling Unit, commonly called an ADU, is a smaller residential living space located on the same property as an existing single-family home. Depending on local zoning regulations, an ADU may be:
  • A detached backyard cottage
  • An attached home addition
  • A garage conversion
  • A converted basement or other existing space
  • A guest house or in-law suite
Each city and county has different requirements regarding ADUs, including setbacks, maximum size, parking, and utility connections. That's why proper planning is essential before construction begins.
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Why Homeowners Build ADUs
Homeowners choose ADUs for many different reasons.

Common uses include:
  • Housing aging parents or family members
  • Creating a private guest house
  • Providing space for adult children
  • Generating rental income
  • Building a home office or studio
  • Increasing property value
  • Adding flexible living space for the future
An ADU gives you additional usable space while making the most of your existing property.
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Custom ADU Design & Permit Drawings
Every property is different, and every homeowner has different goals. Our designers work with you to develop a custom layout that fits your property while meeting local building requirements. Once the design is approved, we prepare detailed permit drawings that your contractor and building department can use for the permitting process.

Our services may include:
  • Custom ADU floor plans
  • Site measurements
  • Preliminary design concepts
  • Permit drawings
  • Site plans
  • Coordination with structural engineers when required
  • Assistance throughout the permitting process
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Planning Your ADU
Before designing your ADU, there are several important questions to answer:

  • How much space do you need?
  • Will the ADU be attached or detached?
  • Will it include a kitchen and bathroom?
  • Does your property meet local zoning requirements?
  • What permits will be required?
  • How will the new space connect to existing utilities?
Our team helps guide you through these decisions before construction begins, reducing surprises and helping avoid costly revisions later.
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  • We had such a great experience working with ArcDesign. From consult to final plan, it was seamless and timely. We couldn't have asked for a better team. They were patient with us, advised us, and are excellent communicators. We are so pleased with ArcDesign and will contact again, should the need arise. ArcDesign, Thank you so much. We look forward to the next steps and for you to see the final result.
    R.M.
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  • I have worked with ArcDesign on two home renovation projects; ranging from a master bathroom/closet addition to an extensive major home remodel. They have been wonderful to work with! Everyone in their office is professional, easy to communicate with, and architecturally talented! They are always quick to respond to any questions or requests, and truly care about bringing our vision to life exactly as we want it. Ben meticulously designed our dream home. His attention to detail and our desires really showed during the entire process. We highly recommend them!
    A.H.
    Review from Houzz.com
  • I was very impressed with Arc Design. Randy worked with me till we got everything that I wanted in the plan for my mother-in-law apartment. He was very patient and listened to everything that I said and all of my ideas and it turned out exactly how I wanted it. He had great ideas that I didn't think of and I am looking forward to the build. I highly recommend this firm.
    A.B.
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  • The team at ArcDesign has done a wonderful job for us. Right from the start and through out the process they were very responsive. We are very happy with the job they did for us and would not hesitate to hire them again for another project.
    P.
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Planning an ADU Starts with the Right Team

A well-designed Accessory Dwelling Unit can provide years of comfort, flexibility, and added property value, but every successful project begins with careful planning. Before construction starts, it's important to understand how your property, local zoning regulations, setback requirements, and permit process may affect your design. Taking the time to create detailed, accurate plans can help prevent costly revisions, unexpected delays, and construction issues later.

At ArcDesign, we work closely with homeowners to transform ideas into practical, permit-ready designs that builders can confidently follow. Whether you're planning a detached guest house, an in-law suite, a garage conversion, or a private rental unit, our team is committed to creating a design that complements your existing home while meeting your family's unique needs. From the initial concept through the permitting process, we're here to make every step as smooth and straightforward as possible.

If you're ready to start planning your Accessory Dwelling Unit, call 727.446.8022 Monday through Friday, 9 AM to 5 PM to schedule your free design consultation. We'd be happy to discuss your project, answer your questions, and help you take the first step toward bringing your vision to life.

Accessory Dwelling Unit

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