Accessory dwelling unit near me — Boston, MA

Looking for accessory dwelling unit near me in Boston, MA? Call AccessoryDwellingUnit Pros for a contact a provider — no obligation. Licensed adu builders serve Boston and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

About this service

Searching for an ADU near you helps you find design and construction firms that are already familiar with your local zoning laws and permit offices. This is a great starting point when you want to see what is possible on your specific piece of land. Local experts can visit your site to determine if your lot qualifies for a detached unit or garage conversion based on local setbacks and utility access. Exact pricing confirmed free on the call.

Frequently asked in Boston

What are the disadvantages of ADUs in Boston?

In Boston's tight urban environment, disadvantages might include the complexity of navigating local zoning laws and potential impacts on existing utility services. Securing permits can also be a lengthy process. However, these challenges are manageable with the right guidance.

How much does an ADU cost in Massachusetts?

What are the rules for ADUs in California?

While California has specific ADU laws, Massachusetts has its own regulations that govern ADUs. It's crucial to understand Boston's local ordinances regarding setbacks, size limitations, and occupancy. We can help clarify these for your project.

Is an ADU allowed in Maryland?

This question pertains to Maryland, but for Boston, ADUs are generally permitted under specific city zoning codes. We can confirm eligibility for your address. Understanding the local bylaws is key to a successful ADU build.

What are the rules for ADU in California?

California's rules are distinct from those in Massachusetts. For Boston, the focus is on compliance with Boston's building codes and zoning requirements. This ensures your ADU meets all local safety and structural standards.

Massachusetts does not currently have a comparable statewide grant program for ADUs. However, exploring local incentives or financing options can still make your Boston ADU project feasible.

Also serving nearby: Quincy · Cambridge · Lynn · Newton · Brockton

All cities in Massachusetts →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

653,833residents

13,525per sq mile

8ZIP codes served

Serving all of Boston — population 653,833; about 13,525 residents per square mile across 48.3 sq mi. ZIP codes covered include 02108, 02109, 02110, 02111, 02112, 02113, 02114, 02115.

Neighborhoods served in Boston: Back Bay, Beacon Hill, North End, South End, West End, Charlestown — and every surrounding area.