5 Critical ADU Regulations Your Builder Should Know About

Building an Accessory Dwelling Unit (ADU) is an exciting way to add functionality and value to your property. Whether you’re looking to create rental income, provide a private space for family, or simply add versatility to your home, an ADU can bring significant benefits. But while the rewards of building an ADU are clear, navigating the regulations behind it can be complex.

At Prospect 30 Eight Construction, we’ve been building high-quality ADUs for years in the Denver Metro Area and the Front Range. We know from experience that working with a builder who understands local regulations is key to ensuring a successful project.

Here are five critical ADU regulations every builder should know about—and that you should feel confident discussing with them before starting your project.

1. Zoning Requirements

Every city and county has zoning regulations that determine where ADUs can be built. In many areas, ADUs are permitted in residential zones, but some neighborhoods may have restrictions that prohibit them entirely. Your builder should be well-versed in your local zoning laws and able to identify whether your property is eligible for an ADU.

Additionally, zoning regulations often dictate factors like lot size, setback requirements, and maximum density. At Prospect 30 Eight Construction, we carefully evaluate your property to ensure it meets zoning requirements before moving forward with any construction work.

2. Size Limitations

ADUs typically have restrictions on size, which can vary depending on your jurisdiction. These limits often specify maximum square footage for the dwelling or a percentage of the primary home’s size. A knowledgeable builder can design an ADU that not only fits within size limitations but also maximizes your available space.

We use innovative design techniques to create small living spaces that feel open, functional, and tailored to your lifestyle—without violating local size requirements.

3. Occupancy and Use Rules

Most municipalities regulate who can live in an ADU and what purposes it can serve. For example, many cities require ADUs to be used strictly for residential purposes and prohibit commercial use. Some areas also have owner-occupancy rules, meaning the property owner must live in either the primary home or the ADU.

Your builder should be familiar with these rules and help you plan your ADU in a way that complies with local ordinances. At Prospect 30 Eight Construction, we prioritize transparent communication to ensure you never encounter surprises after construction is complete.

4. Parking Requirements

Parking is another regulation that varies by city. Some municipalities require additional parking spaces for ADUs, while others waive this requirement in specific circumstances, such as proximity to public transportation.

Navigating these rules can be tricky, but an experienced builder knows how to work within parking requirements without compromising your property’s functionality.

5. Permitting Process

Obtaining the necessary permits is one of the most critical steps in building an ADU. From construction permits to utility connections, every phase of the project must meet local approval standards. Working with a builder who understands the permitting process can save you time, money, and stress.

At Prospect 30 Eight Construction, our team has perfected the process of navigating permits across the Denver Metro Area. We handle paperwork efficiently and ensure your project stays on track through proper planning and communication.

Choose a Builder You Can Trust

Building an ADU is a significant investment, and understanding local regulations is essential to creating a space you’ll love for years to come. At Prospect 30 Eight Construction, we have the expertise, experience, and dedication to ensure your ADU is built to the highest standards.

From zoning and permits to innovative design and construction, every ADU we build reflects our commitment to quality and customer satisfaction. As a third-generation builder, Chris Moore and our award-winning team are here to guide you through every step of your project.

Since 2006, Prospect 30 Eight Construction has been building top-quality custom homes, home additions, and Accessory Dwelling Units (ADUs) throughout the Denver Metro Area and the Front Range. If you have any questions, please contact us for a free consultation.