Looking for adu builder in Boston, MA? Call AccessoryDwellingUnit Solutions 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 involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

An ADU builder is a professional partner who manages the entire development process for your project. You need one if you want a turnkey experience rather than trying to manage architects and contractors yourself. We take your vision and turn it into a functional structure while handling the heavy lifting of construction management and oversight. We keep your project on track and within your budget. Exact pricing confirmed free on the call.

Frequently asked in Boston

What's the cost for an accessory dwelling unit permit in Boston?

The cost for an accessory dwelling unit permit in Boston varies based on project scope and city fees. These fees cover plan review and inspections. We can provide an estimate of these costs during your consultation. Understanding these expenses upfront is crucial. Let us help you budget accurately for your Boston ADU project.

Who are the best accessory dwelling unit builders in Boston?

The best accessory dwelling unit builders in Boston are licensed, insured, and have a proven track record in the city. They understand Boston's unique building codes and zoning regulations. We work with such professionals. They are committed to quality craftsmanship. Let us help you find a builder suited to your specific needs.

What is involved in accessory dwelling unit building in Boston?

What accessory dwelling unit companies operate in Boston?

Several accessory dwelling unit companies operate in Boston, offering services from design to construction. We partner with reputable firms. They specialize in ADUs and understand the local market. We can help you select a company that fits your project's scope and budget. Contact us for recommendations.

How do I get an ADU estimate in Boston?

To get an ADU estimate in Boston, simply call us. We'll gather basic information about your property and desired ADU. Then, we arrange for a consultation with a qualified professional. They will provide a detailed quote. This estimate will cover all aspects of your project. It's a no-obligation process.

What is a detached accessory dwelling unit in Boston?

A detached accessory dwelling unit in Boston is a separate, standalone housing unit on a single-family property. It's distinct from the primary residence. This could be a backyard cottage or garage conversion. These units offer flexibility for homeowners. We can assess your property's suitability for one.

What does an accessory dwelling unit contractor do in 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: Back Bay, Beacon Hill, North End, South Boston, Jamaica Plain — and every surrounding area.