Accessory dwelling unit builders near me

Looking for accessory dwelling unit builders 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

Local builders specialize in the specific zoning codes and climate considerations of your region. Searching for builders in your area is the right step when you are ready to break ground and need a team that understands local geography, utility access, and neighborhood aesthetic requirements. These professionals handle the physical assembly of the structure, ensuring it meets all safety and energy standards required by your specific city or county government. Exact pricing confirmed free on the call.

Frequently asked in Boston

What are the disadvantages of ADUs in Boston?

In Boston, potential disadvantages include navigating complex zoning regulations, which can sometimes be restrictive depending on the neighborhood. Increased utility costs and property taxes are also factors to consider. The permitting process itself can also be lengthy and require careful attention to detail.

How much does an ADU cost in Massachusetts?

ADU costs in Massachusetts vary greatly based on size, materials, and site specifics. Factors like foundation type, interior finishes, and whether you're building a detached unit or an addition all play a role. For an accurate figure for your Boston property, a site assessment is crucial.

What are the rules for ADUs in Massachusetts?

Massachusetts has statewide ADU laws, but local zoning ordinances in cities like Boston can add further requirements. These typically cover lot size, setback requirements, and parking provisions. It's essential to check both state and Boston-specific regulations.

Is an ADU allowed in Maryland?

While this service is for Massachusetts, Maryland does have ADU allowances, though specific rules vary by county and municipality. For precise information regarding Maryland ADU legality, you'd need to consult local zoning departments there.

What are the rules for ADU in California?

California has been proactive in promoting ADUs with state laws that streamline approvals and limit local restrictions. Common rules involve size limits, owner-occupancy requirements (though some are being relaxed), and utility connections. Again, this is for CA, not Boston.

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: Beacon Hill, South End, Back Bay, North End, Jamaica Plain, West End — and every surrounding area.