What is an ADU in Vermont?

An ADU (Accessory Dwelling Unit) is a self-contained living space located on the same lot as a single-family home. It includes its own kitchen, bathroom, and sleeping area, and can be built within the existing home, as an attached addition, or as a detached structure on the property.

How big can an ADU be in Vermont?

In Vermont, an ADU is generally allowed to be up to 30% of the size of the main house or 900 square feet, whichever is greater. Keep in mind that specific limits may differ depending on local town zoning rules.

Do I need a permit to build an ADU in Vermont?

Yes. Most ADU projects in Vermont require a zoning permit, and depending on the work, you may also need building, water, or wastewater permits. It’s important to confirm requirements with your local town planning and zoning office before starting construction.

Can an ADU be detached or does it have to be inside my house?

ADUs can be located within the main house, added on as an extension, or built as a separate structure on the property, such as a backyard cottage. All designs must comply with local zoning and permitting rules.

Can I rent out my ADU in Vermont?

In most Vermont towns, it is possible to rent out an ADU, but rules differ by location. Some municipalities have requirements about owner occupancy, rental type, or short-term rentals, so it’s important to check with your local town office before renting.

How many ADUs can I build on my property?

In most Vermont towns, a single-family property is typically allowed to have one ADU. Adding more than one unit, such as multiple cottages, usually requires additional approvals and compliance with local zoning regulations.

Will adding an ADU affect my septic or water system?

Adding an ADU increases water usage and wastewater production, so your septic system and water supply may need to be upgraded or obtain a new permit to meet state health and environmental requirements.

Is there financial help available for building an ADU in Vermont?

Certain Vermont state programs have provided grant funding, sometimes up to $50,000, to assist with building ADUs, particularly for owner-occupied homes. Program availability may change, so it’s best to check current funding opportunities.

What types of ADUs work best in Vermont’s climate?

ADUs in Vermont should be built with effective insulation, proper drainage, and frost-resistant foundations to ensure they remain comfortable and durable throughout the year, even in cold and wet conditions.

How do I find out if my property is eligible for an ADU?

To find out if your property is eligible for an ADU, begin by consulting your local planning and zoning office, reviewing your town’s zoning bylaws, and checking Vermont’s state ADU regulations. Each town may have unique rules regarding size limits, setbacks, and permits.