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Waterfront Construction Inc
Back of a two-story addition in taped green sheathing with new windows installed

Photo: Back of the addition: taped sheathing with the new windows in place, Lynnfield, MA

Home Additions in Chelmsford, MA

Waterfront Construction Inc, an owner-led general contractor, offers home additions in Chelmsford, MA. Chelmsford is in Middlesex County, about 24 miles northeast of our Northborough base. Our closest documented addition project is in Lynnfield, MA, about 17 miles east.

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Chelmsford, MA at a glance

County
Middlesex County, Massachusetts · 47 places we serve there
From our base
About 24 miles northeast
Building permits
Chelmsford's building department
Contractor rules
MA Home Improvement Contractor registration (M.G.L. c.142A)

Nearest documented addition project

Our documented addition and other work, by distance:

Permits and rules in Chelmsford, MA

An addition needs a building permit from Chelmsford's building department and must meet local zoning rules such as setbacks. On septic, an added bedroom also needs Board of Health review under Title 5. Since February 2, 2025, one accessory dwelling unit, up to 900 square feet or half the main house if smaller, is allowed by right in single-family zones.

What's included

  • Room & second-story additions
  • In-law suites (ADUs)
  • Sunrooms & porches
  • Designer & engineer coordination

Costs and timelines: our home additions guide

How Much Does a Home Addition Cost in Massachusetts?

Free estimate

Tell us about your project

Free and no-obligation. Prefer to talk? Call (508) 816-2726 (Mon–Sat, 7am–6pm).

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  • 500+ projects completed
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Distances: straight line, GeoNames data (CC BY 4.0). Updated .