Home Additions Designed to Grow With You

Thoughtfully planned home additions in Massachusetts — designed, permitted, & built under one roof

Custom Home Additions That Feel Original to Your Home

A well-designed home addition should do more than add square footage. It should feel like it was always part of the house. J.P. Hoffman Design Build specializes in custom home additions that integrate seamlessly with existing architecture, structure, and site conditions. Serving homeowners of Greater Boston, we design and build additions that solve real space challenges while preserving the character and integrity of your home.

From primary suite additions and in-law apartments to garage additions and expanded living areas, our design-build approach ensures clarity, coordination, and confidence from the initial conversation through construction.

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Benefits of a Professionally Designed Home Addition

Stay in the home and neighborhood you love

Add space without the disruption or cost of moving.

Architecturally cohesive design

Additions are proportioned, detailed, and aligned with your existing home.

Flexible, long-term solutions

Ideal for multigenerational living, accessibility needs, or changing family dynamics.

Efficient planning and construction

Integrated design-build reduces surprises, delays, and change orders.

J.P. Hoffman’s Process for Additions:
Your Design-Build, Streamlined

When you work with J.P. Hoffman Design Build, you get one team from idea to completion.

  • Consultation & Feasibility

    We evaluate your lot, local regulations and your goals, and give you realistic options.

  • Design & Scope Development

    We design the Addition, finalize scope, select finishes and coordinate with specialty trades—all within your budget.

  • Permitting & Planning

    We handle permit filings, logistics, and schedule so you’re ready for construction.

  • Construction & Delivery

    Built with precision and care, your Addition is completed on time and on budget with our craftsmanship standard.

  • Support & Warranty

    We stand behind our work with a clear warranty and ongoing guidance so your new unit continues to perform.

Why Choose J.P. Hoffman Design Build for Your Addition

J.P. Hoffman Design Build is a full-service design, build, remodeling, and general contracting firm serving communities south of Boston.

Family-owned and operated by husband-and-wife team Jason and Megan Hoffman, we lead with integrity, craftsmanship, and care—values that guide every decision from first conversation to final walkthrough.

Many firms say they value trust. We designed our entire process around earning it.

Where Vision Meets Experience

Every successful renovation starts with the right leadership. At J.P. Hoffman, we begin with experienced design-build professionals who shape the vision, define the scope, and establish the strategy before construction begins. The result is a well-led project with fewer surprises and stronger outcomes.

One team handles design, engineering, and construction from start to finish—with trusted interior design partners available to complete the vision.

Realistic cost ranges are provided early—based on actual project data, not ballpark guesses.

Designs are both beautiful and buildable.

Other firms take on as many projects as they can. J.P. Hoffman Design Build limits large-scale additions to one at a time.

Hear What Our Clients Say

“We have been doing home improvement projects, small to large, for over 30 years… Jason is the finest all-around talent / house-smith that we’ve had work on our home.”
MARK • NORWELL, MA
“Jason possesses a rare combination of attributes that afford him the simultaneous perspective of an architect, an engineer, and a builder. The end result is a unique, well thought out, elegant extension of our home that truly reflects our highest aspirations.”
VITO • EASTON, MA
“I feel lucky to have found someone that is the epitome of what you hope for when hiring someone you’re counting on to make your vision a reality. I believe Jason is as good as they come and that over-delivering is in his DNA!”
JEFF • SHARON, MA
“We needed help with our 1920s Colonial… J.P. Hoffman was able to beautifully integrate the design and build of the room to meet our needs and keep the home in it’s original, but much improved state.”
NINA • EASTON, MA

Ready to Explore Your Addition?

Call us at (508) 472-6723 or complete the form to schedule a consultation.

We’ll talk about your goals, property, budget, and how we can build an Addition that works for your every-day life.

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  • Accepted file types: jpg, png, pdf, Max. file size: 256 MB.
    Feel free to upload a few photos with your inquiry.
  • Accepted file types: jpg, png, pdf, Max. file size: 256 MB.
    Feel free to upload a few photos with your inquiry.