Local adu — Cambridge, MA
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.
Frequently asked in Cambridge
Where can I find an ADU near me in Cambridge?
Are there accessory dwelling unit grants available in Cambridge?
What is the best accessory dwelling unit for Cambridge?
What are accessory dwelling units ADUs?
What is the cost of an accessory dwelling unit in Cambridge?
What is accessory dwelling unit financing in Cambridge?
Who is an accessory dwelling unit contractor in Cambridge?
Also serving nearby: Newton · Boston · Quincy · Lynn · Brockton
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Cambridge — population 118,214; about 18,479 residents per square mile across 6.4 sq mi. ZIP codes covered include 02138, 02139, 02140, 02141, 02142, 02238.
Neighborhoods served in Cambridge: Harvard Square, Central Square, Inman Square, Porter Square, East Cambridge — and every surrounding area.
Areas we serve
Browse by state, then city.
California (4)
All of California · Fairfield · Murrieta · Richmond · Vallejo