Home Additions & Custom Construction

Expand your home or build from the ground up with Keystone Builder Group’s quality craftsmanship, thoughtful planning, and hands-on project management

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Modern open-plan space with sofas, tables, and a bar area. Large windows let in natural light. Minimalistic decor.
Benefits

Why Homeowners Choose Keystone for Their Addition

  • Designed to Belong

  • Craftsmanship That Lasts

  • Hands-On Project Management

  • More Space. More Possibilities

Ready to Expand Your Living Space?

Contact Keystone Builder Group today for home addition.

FAQs

Frequently Asked Questions About Home Additions

Get answers to common questions about expanding your home.

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How long does a typical home addition project take?

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Can I customize my home addition design?

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What types of home additions do you specialize in?

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Are you experienced working in Massachusetts communities like Somerville or Cambridge?

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Will my home addition meet local building codes?

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