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ADU Parking Requirements in Millbury, MA

Millbury requires 1 parking space(s) per ADU.

ADU parking rules in Millbury, Massachusetts. Required parking spaces, transit exemptions, and how to qualify for reduced parking.

Data verified as of March 2, 2026
State Baseline Only — Local Details Not Yet Researched

ADU Regulations in Millbury

Millbury follows the Massachusetts state baseline under the Affordable Homes Act. This means all Massachusetts state-level ADU rights apply — including by-right approval, no owner occupancy requirement, and standardized size limits. Millbury may also have additional local regulations that supplement the state baseline.

Parking Requirements

Millbury requires 1 dedicated parking space(s) for an ADU. There are no transit stations in Millbury that would qualify for a parking exemption. The parking space(s) must be located on-site and meet dimensional standards (typically 9 ft x 18 ft minimum).

Meeting the Parking Requirement

To meet Millbury's 1-space requirement, you can use existing driveway or garage spaces, create new on-site parking, or (if near transit) qualify for the exemption. Consider how the parking layout affects your ADU's size and placement on the lot.

Important: State Baseline Data

The information on this page reflects Massachusetts state baseline rules. Millbury may have additional local requirements. We recommend confirming with your local building department before starting your project.

Millbury ADU Rules at a Glance

Max Size

900 sq ft

% of Home

50%

Parking

1 space(s)

Approval

BY RIGHT

Owner Occupancy

Not required

Rental Allowed

Yes

Short-Term Rental

Not allowed

Millbury Building Department

Millbury Municipal Office Building

127 Elm St, Millbury, MA 01527, USA

Phone: (508) 865-4710

Visit Website →

Frequently Asked Questions

How many parking spaces does an ADU require in Millbury?

Millbury requires 1 dedicated parking space(s) for an ADU. This can be a driveway space, garage space, or dedicated on-site parking area. Street parking does not typically count toward this requirement.

Can I use existing driveway parking for my ADU in Millbury?

In most cases, existing driveway or garage spaces can count toward Millbury's parking requirement, as long as the spaces meet dimensional standards (typically 9 ft wide by 18 ft deep). Check with Millbury's building department for specific requirements on parking dimensions and configuration.

Does tandem parking count for ADU requirements in Millbury?

Tandem parking (cars parked one behind another in a driveway) may count toward Millbury's ADU parking requirement, depending on local interpretation. This is a common question — confirm with Millbury's building inspector before relying on tandem spaces.

What happens if I can't provide ADU parking in Millbury?

If you can't meet the parking requirement, options include applying for a variance, exploring shared parking arrangements, or choosing an ADU type (like a conversion) that may have different parking standards.

How accurate is the ADU data for Millbury?

The information on this page reflects Massachusetts state baseline rules under the Affordable Homes Act. Millbury may have additional local requirements that differ from the state baseline. We recommend confirming with your local building department before starting your project.

Where can I find all ADU regulations for Millbury?

Visit our complete ADU rules page for Millbury, MA for a full overview of zoning, permits, size limits, setbacks, parking, and costs. We cover all Massachusetts municipalities with data sourced from local ordinances and state law.

Check Your Address

See exactly what ADU rules apply to your specific property in Millbury.