Home Additions in Wellesley, MA

Wellesley, MA at a glance

County

Norfolk County, Massachusetts · 27 places we serve there

From our base

About 18 miles east

Building permits

Wellesley's building department

Contractor rules

MA Home Improvement Contractor registration (M.G.L. c.142A)

Nearest documented addition project

Front Porch Addition in Needham, MA

3 mi east of Wellesley

Our documented addition and other work, by distance:

• Needham, MA: porch addition 3 mi east
• Framingham, MA: client review of our kitchen remodel 6 mi west
• Marlborough, MA: client review of our first-floor remodel 14 mi west
• Hudson, MA: client review of our bathroom remodel 15 mi northwest
• Westborough, MA: client review of our new siding and windows 17 mi west
• Northborough, MA: client review of our deck and small addition 18 mi west
• Mansfield, MA: kitchen remodel 19 mi south
• Lynnfield, MA: addition and exterior remodel 21 mi northeast
• Lynnfield, MA: addition framing video 21 mi northeast
• Shrewsbury, MA: client review of our kitchen and bathroom remodel 21 mi west
• Salem, NH: pool deck 34 mi north

Permits and rules in Wellesley, MA

An addition needs a building permit from Wellesley'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?

Distances: straight line, GeoNames data (CC BY 4.0). Updated October 8, 2026.