ADU Construction Contractor in Massachusetts
Build More Space and Possibility Into Your Property
Create a private living space for family members, guests, rental use, work, or long-term flexibility with a professionally planned and built accessory dwelling unit.
Forma Construction helps homeowners across the North Shore, Greater Boston, and surrounding Massachusetts communities plan and build custom ADUs designed around their property, lifestyle, and future needs.
From initial project evaluation and planning through permitting, construction, utility coordination, and final completion, our team manages the process with clear communication and careful execution.
Fill out the form below, and our team will contact you shortly to discuss your project.
See Some of Our Work
TRUSTED BY HOMEOWNERS ACROSS MASSACHUSETTS
See why homeowners across Massachusetts trust our team for quality craftsmanship, reliable service, and outstanding results.
Create More Living Space Without Leaving Your Property
Your property may already have the potential to provide the additional space your family needs.
An accessory dwelling unit can create a separate and functional living area for:
- Aging parents
- Adult family members
- Long-term guests
- Independent living
- Rental use
- A private home office
- A studio or creative workspace
- A caregiver
- Flexible future use
Instead of moving or making major compromises inside the existing home, an ADU can help you use your property more effectively.
A professionally planned ADU can provide greater privacy, flexibility, functionality, and long-term value.
What Is an Accessory Dwelling Unit?
An accessory dwelling unit, commonly called an ADU, is a secondary living space located on the same property as a primary residence.
Depending on the property and project, an ADU may be:
- A separate structure
- Connected to the primary home
- Created from an existing garage
- Built above a garage
- Developed within an existing part of the property
- Designed as a compact studio
- Designed as a complete private residence
A functional ADU may include:
- Sleeping space
- A bathroom
- A kitchen or kitchenette
- Living space
- Storage
- Private access
- Heating and cooling
- Plumbing and electrical systems
The appropriate design depends on the property, intended use, local requirements, available space, and construction scope.
Why Choose Forma Construction for Your Remodeling Project
Quality Work Done Right
We focus on precision, clean execution, and long-lasting results — not shortcuts.
Licensed & Insured
Your home is protected. Our team follows all standards for safety, compliance, and reliability.
Clear Communication
You always know what’s 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 & On-Budget
We deliver on-time and on-budget quality construction work and are always mindful of your budget.
Frequently asked questions
Here are the most common questions homeowners ask before starting a remodeling project.
ADU means accessory dwelling unit.
It is a secondary living space located on the same property as a primary residence.
Depending on the property and design, it may be detached, attached, created from an existing structure, or built above a garage.
An ADU may be used for family members, guests, independent living, aging parents, a home office, a caregiver, rental purposes, or other flexible residential uses.
The intended use should be considered during planning because it can affect the layout, utilities, privacy, and project requirements.
A home addition typically expands the primary residence.
An ADU is generally designed as a more independent secondary living space and may include its own sleeping area, bathroom, kitchen, utilities, and entrance.
Possibly.
The existing structure, ceiling height, foundation, condition, utilities, insulation, access, parking, and local requirements must be evaluated first.
It may be possible, but the existing garage structure and foundation must be reviewed to determine whether they can support another level.
Zoning, height limitations, access, utilities, and structural requirements must also be considered.
Many ADUs are designed with a kitchen and bathroom to provide more independent living.
The applicable plumbing, electrical, ventilation, construction, and local requirements need to be included in the project planning.
ADU projects generally require building permits.
Depending on the scope, additional approvals or permits may be needed for electrical, plumbing, mechanical systems, zoning, utilities, or other work.
The exact requirements depend on the municipality and property.
The permitted size may depend on local requirements, the property, the primary home, setbacks, lot coverage, building height, utilities, and the type of ADU.
The property should be evaluated before determining an appropriate size.
The cost depends on factors such as:
- Detached or attached construction
- New construction or conversion
- Square footage
- Foundation requirements
- Site access
- Utility connections
- Kitchen and bathroom specifications
- Structural work
- Exterior materials
- Interior finishes
- Heating and cooling
- Property conditions
A consultation and property evaluation are needed before providing a reliable estimate.
The timeline depends on design development, engineering, permits, site conditions, material availability, inspections, utility work, project size, and complexity.
A more realistic schedule can be developed after reviewing the property and defining the project scope.
Rental use may be possible depending on the property, municipality, applicable requirements, and intended occupancy.
Homeowners should confirm the rules that apply to their specific property before relying on rental income.
An ADU can be designed to provide greater independence through a private entrance, bathroom, kitchen, living area, bedroom, storage, and separate daily-use spaces.
The layout can also consider accessibility and future mobility needs.
In many cases, homeowners can remain in the primary residence during construction.
The level of disruption depends on the ADU type, utility connections, access, site work, and whether construction affects the existing home.
Forma Construction coordinates the permitting stages included within the agreed project scope.
The exact responsibilities and documentation should be confirmed during the project consultation.
It is helpful to involve a contractor before finalizing major design or financial decisions.
Early construction input can help identify site limitations, utility requirements, structural concerns, access issues, and other practical considerations.
