Northfield Builders · Massachusetts
From the first line on paper to the night you turn the lights on.
Additions, kitchens, baths and full exteriors, built by one crew that answers the phone.
- 01Plan
- 02Frame
- 03Build
- 04Home
Why homeowners call us
More room, a better kitchen, a roof you stop worrying about.
We plan it with you, put the price in writing and keep the same crew on your job from the first footing to the final walkthrough.
- 18years building in Massachusetts
- 420+projects finished on schedule
- 1crew from start to finish
Services
Everything a house needs, under one contract.
Pick a starting point. Most of our projects combine two or three of these.
01Home additions
Second stories, bump-outs and in-law suites that look like they were always there.
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02Kitchens
Layouts that work, cabinets that last and an island where everybody ends up.
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05Framing
Structural framing for new builds and additions, plumb, square and on schedule.
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07Roofing
Architectural shingle roofs with ice-and-water protection for New England winters.
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Recent projects
Real houses. Real neighbors.
A few of the jobs we closed out this year.
- Two-story additionChelmsford, MA · 2026
- Kitchen remodelLexington, MA · 2025
- Primary bathActon, MA · 2025
- Cedar deckWestford, MA · 2026
- Siding & trimBillerica, MA · 2025
Finished basementBurlington, MA · 2025
How it works
Four steps. No surprises.
You always know what happens next, what it costs and who is on site.
- 01Week 1
Consultation
We visit, measure and listen. You get a written estimate, free.
- 02Weeks 2–4
Design & permits
Drawings, selections and town permits, handled by us.
- 03On schedule
Construction
One crew, one project manager and a weekly update you can actually read.
- 04Move in
Handover
Final walkthrough, clean site and a written warranty on our work.
Peace of mind
Licensed, insured and in writing.
Fully licensed and insured in Massachusetts. Certificates are available on request before any work begins.
- Licensed & insuredGeneral liability and workers' comp on every job.
- Fixed written priceThe number we sign is the number you pay.
- Clean job siteSwept every day. Your driveway stays yours.
- Workmanship warrantyWe come back if something isn't right.
Service area
Building across northern and central Massachusetts.
Based in Chelmsford. We work within about 40 miles.
01 Middlesex County
- Chelmsford
- Lowell
- Westford
- Acton
- Concord
- Lexington
- Burlington
- Billerica
02 Essex County
- Andover
- North Andover
- Methuen
- Haverhill
- Lawrence
03 Worcester County
- Worcester
- Shrewsbury
- Marlborough
- Fitchburg
- Leominster
Not on the list? Call us. If we can reach you, we'll come.
Free estimate
Tell us about your house.
Call, send a text or fill this out. We answer the same business day.