Sunroom addition with a bank of windows on a gray single-story home

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Home Additions · Massachusetts

Home Addition Contractor Serving the North Shore and Greater Boston

Expand Your Home Without Leaving the Place You Love. Create more space, improve your home’s functionality, and build an addition designed around the way your family lives.

5.0 on Google · 49 reviews
Licensed and insured
Permits handled for you

(781) 600-2622

Get your free estimate

Tell us about your project. We will call you to set up a visit.

Prefer to talk? Call (781) 600-2622

Great form demands a solid structure

5.0 on Google, 49 reviews
Licensed and insured
Permits and inspections handled
Free estimate

Home Additions

More Space for the Life You Are Building

Your home may be in the right neighborhood but no longer provide the space or functionality your family needs.

You may be dealing with:

Moving is not always the best solution.

Not enough bedrooms
A kitchen or dining area that feels too small
Limited space for entertaining
No dedicated home office
The need for a guest or in-law suite
A growing family
An outdated or restrictive layout
The need for additional storage
A home that no longer supports your routine

Forma Construction helps homeowners across the North Shore, Greater Boston, and surrounding Massachusetts communities plan and build custom home additions that feel naturally connected to the existing property.

Black-clad home addition with floor-to-ceiling glass doors and a paver patio

What we do

Custom Home Additions Designed Around Your Needs

Room Additions

Add a bedroom, home office, playroom, guest room, hobby room, or flexible living space without relocating.

Primary Suite Additions

Create a private primary suite with options such as a bathroom, walk-in closet, sitting area, or direct access to an outdoor space.

Kitchen and Dining Expansions

Expand your kitchen, dining room, storage, and entertaining areas while improving the connection between spaces.

Family Room Additions

Build a comfortable gathering space for daily life, family activities, and entertaining guests.

Second-Story Additions

Increase your home’s usable square footage by building vertically instead of reducing your available yard space.

Bedroom Additions

Create the additional bedroom space needed for a growing family, relatives, or guests.

In-Law and Guest Suites

Build a more private and comfortable space for relatives or long-term guests while keeping them connected to the main home.

Home Office Additions

Create a dedicated workspace with better privacy, organization, lighting, and separation from the main living areas.

Garage and Mudroom Additions

Add parking, storage, organization, and a practical transition between the home and the outdoors.

Sunrooms

Create a bright and comfortable space that increases the connection between your home and outdoor environment.

Complete Home Expansions

Combine an addition with interior remodeling and layout improvements to create a larger transformation of the property.

Gallery

Home Additions by our team

Window seat with a wood bench under a bank of windows in a new addition

Covered porch addition framed and in progress

Wall framing going up on a new brick foundation for a home addition

Roof framing of a home addition with ladders in place

See the full gallery

The Forma standard

Great form demands a solid structure.

In construction, the form is the mold that receives the concrete and defines its limits. It is where every solid project begins, and it is how we work.

Quality work done right

We focus on precision, clean execution and long-lasting results, not shortcuts.

Licensed and insured

Your home is protected. Our team follows all standards for safety, compliance and reliability.

Clear communication

You always know what is happening in your project. No confusion, no surprises.

No hidden costs

Transparent pricing from the beginning, so you can plan your investment with confidence.

Clean, organized job sites

We respect your home and keep every project clean, safe and well managed.

On time and on budget

We deliver quality construction work on time and on budget, always mindful of your budget.

Forma ConstructionProject sequence

How it works

From the first call to the final walkthrough

Talk to us
Tell us about your home and what you want to build. We answer questions and set up a visit.
Free estimate
We see the space, listen to your goals and give you a clear estimate, so you can plan with confidence.
Plans and permits
We take care of the permits, inspections and approvals your town requires.
Construction
Our team builds with care, keeps the job site clean and keeps you informed every step of the way.
Final walkthrough
We walk the finished project with you and make sure every detail is right.

Permits

Worried about permits? We handle everything for you.

Town permits, inspections and approvals are part of our job, not yours. You get a project that is done right and signed off.

Licensed and insured

Permits, inspections and approvals managed by us
Clear communication from start to finish
Transparent pricing from the beginning
Clean, organized job sites

Reviews

What homeowners say

5.049 reviews on Google

“We are very happy with Forma Construction, they did a fantastic job with our home addition. The team was professional, the quality of the work is excellent, and they got the details just right matching the siding, windows, etc. if you need a contractor for an addition, call these guys.”

Thiago SouzaGoogle review

“They did an incredible job building our ADU. The team made the whole process stress-free and really nailed all the details we wanted. It’s the perfect extra space for our family, and the quality of the build is top-notch. If you’re thinking about adding an ADU, these are definitely the people to call!”

Marco Antonio MonteiroGoogle review

“Excellent experience with Forma Construction for my full gut renovation. The team was professional, reliable, and delivered high-quality work with great attention to detail. Communication was clear throughout the entire process. I highly recommend Forma Construction for any home remodeling project.”

Ale GomesGoogle review

Frequently asked questions

Do I need permits for a home addition?

Home additions generally require building permits. Depending on the project, additional approvals related to zoning, electrical work, plumbing, mechanical systems, or other construction requirements may also be necessary. The specific requirements depend on the municipality, property, and scope of work.

Can the addition match my existing home?

The exterior materials, roofline, windows, doors, dimensions, finishes, and interior transitions can be planned to complement the existing structure. The objective is to make the addition feel cohesive with the original home.

What types of home additions do you build?

Home addition projects may include bedrooms, primary suites, family rooms, kitchen expansions, dining areas, home offices, guest suites, in-law spaces, garages, mudrooms, sunrooms, second-story additions, and complete home expansions.

Can I add a second floor to my home?

It may be possible, but the existing structure, foundation, zoning rules, building height restrictions, access, roof design, engineering requirements, and project scope must be evaluated first.

How long does a home addition take?

The timeline depends on several factors, including: Size of the addition Complexity Design development Engineering Permitting Material availability Site conditions Inspections Interior finishes Changes requested during construction A more realistic schedule can be developed after reviewing the property and project

How much does a home addition cost?

The cost depends on square footage, structural requirements, foundation work, site access, plumbing, electrical work, HVAC, kitchens, bathrooms, finishes, and overall complexity. A project consultation and property evaluation are required before providing a reliable estimate.

Can we remain in the house during construction?

In many cases, homeowners can remain in the property during at least part of the construction. However, this depends on where the addition connects with the existing home, which systems are affected, and how much interior remodeling is required.

Do you offer free estimates?

Yes. Fill out the form or call us at (781) 600-2622 and we will set up a visit to see your space and prepare a free estimate.

Do you take care of permits?

Yes. We handle the permits, inspections and approvals your town requires, so you do not have to manage the paperwork.

What we build