ADU Construction Plans for Massachusetts Homeowners
If you're in Newton or Somerville, you may already have a rough ADU sketch on the kitchen table, perhaps a small backyard apartment for an aging parent or a rental unit to create more flexibility. The sketch is a useful starting point, but it won't answer the questions your building department, engineer, lender, or future […]
ADU Design and Build in Massachusetts: A Homeowner’s Guide
In Cambridge, a homeowner with a narrow lot near Inman Square may be weighing a backyard cottage for aging parents, a private place for an adult child, or a rental unit that helps offset the mortgage. The question usually isn't whether an ADU sounds useful. It's whether the lot, local zoning, utilities, budget, and permit […]
ADU Zoning Requirements: A Massachusetts Guide
In Cambridge, a homeowner can have a clear family reason for building an ADU, such as creating a private home for an aging parent, while the assessor or building department raises a very different question about lot coverage, setbacks, or the existing number of dwelling units. That's why ADU zoning requirements can't be reduced to […]
ADU Construction Cost Per Square Foot in Greater Boston
In Greater Boston, most ADU projects land around $250 to $400 per square foot, with detached new builds near the top of that range. A complicated detached unit can exceed those planning numbers when excavation, utilities, finishes, or site access create unusual costs. In Arlington, Belmont, or Cambridge, homeowners usually start with a simple question, […]
Addition Cost Per Square Foot: Greater Boston Pricing Guide
In Greater Boston, most professionally built home additions land between $250 and $600+ per square foot all-in, and the final number usually comes down more to structural scope, permitting, and MEP tie-ins than to raw square footage. If you're weighing a room addition in Arlington or Cambridge, that's the number to keep in mind before […]
Soil Testing Cost in Boston: Guide for 2026 Projects
In Arlington, MA, this comes up all the time. A homeowner is ready to build an addition, convert space for family, or start an ADU plan, and then someone says they need a soil report before the permit set can move forward. That catches people off guard because they assume actual costs start with framing, […]
400 Sq Ft ADU: Your Boston Planning Guide 2026
In Cambridge and Somerville, we talk to a lot of homeowners who are in the same spot. They like their block, they don't want to move, but the house no longer fits the way the family lives now. Maybe a parent needs a private place nearby. Maybe a grown child needs a soft landing. Maybe […]
Prefab ADU Cost: Your Massachusetts 2026 Estimate
A homeowner in Somerville can find a prefab ADU advertised at $120,000 to $180,000 for a 600-square-foot unit, but once site work, foundation, utilities, permits, and installation are added, the actual total often lands at $200,000 to $300,000. In Massachusetts, that advertised unit price is often only part of the story, and in the Greater […]