
Boston, Massachusetts
In-Law Suite Additions in Boston, MA
A Boston in-law suite is a small, complete home connected to your house or built as a separate building where zoning allows. ML20 General Construction checks the local zoning first, then plans the private entrance, a safe bathroom, and the climate control around the person who will live there.
- Serving Boston, MA
- Warranty Available
- Free In-Home Estimate
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In-Law Suite Additions in Boston
In-Law Suites for Boston Families
Neighborhoods range from Back Bay row houses and the Victorian South End to the low-rise masonry blocks downtown. For an in-law suite in Boston, we plan a private space with a bedroom, living area, safe bathroom, and its own entrance, and one team coordinates the engineers and trades.
Typical in-law suite projects in Boston:
- In-law suites for Back Bay row houses
- Bedrooms and living areas with a private entrance
- Accessible bathrooms planned for safety
- Kitchenettes where local rules allow
- Separate heating and cooling for the suite

Local conditions
Where an In-Law Suite Fits in a Boston Home
Row houses and older Victorian homes often share walls and may hide dated wiring or many layers of past repairs. Before an in-law suite is laid out, we review the zoning rules for accessory living space, where the private entrance will go, and whether the existing systems can handle the added load.
What we check before design:
- An existing garage as a possible suite
- The basement and room for egress
- Electrical capacity for the suite
- Heating and cooling with separate controls
- Plumbing routes for the bathroom
A suite may make sense if:
- Your lot has space beside or behind the house
- The garage could hold a suite
- The basement is mostly storage
- You want family close but not in every room
- A live-in caregiver needs a private room
No design is drawn until the zoning rules are checked. The written scope then lists the suite type, the entrance, the bathroom, and which systems are shared with the house.
Our process
Our In-Law Suite Process in Boston
An in-law suite puts several trades close together: framers and concrete crews, plumbers, electricians, HVAC specialists, and tile and finishing professionals. For a Boston home, one general contractor lines up each trade in turn and books each inspection at the right phase, so the suite stands ready for the walkthrough before move-in.
- 01
Layout and Zoning
The layout, accessibility, zoning, and permits are defined before work starts.
- 02
Private Entrance
The spot for the private entrance is chosen early, because it shapes the structure and the layout.
- 03
Structural Work
A new foundation and framing, or the conversion of existing space, followed by inspection.
- 04
Systems for Independent Living
Plumbing, wiring, and HVAC planned for independent living, all inspected.
- 05
Accessible Bath
The bathroom designed to be safe for an older family member.
- 06
Finishing Work
Floors, trim, the bathroom, and any kitchenette are finished before the final walkthrough.
Local details
In-Law Suite Details for Boston
Boston is part of the Massachusetts area we serve, within Suffolk County. We plan in-law suites across 55 ZIP codes, from 02101 to 02298, as well as much of Boston and Greater Boston. Unsure whether we reach your street? Call us, and we will confirm it before the first visit.
| Detail | Boston, MA |
|---|---|
| County | Suffolk County, Massachusetts |
| ZIP codes | 55 ZIP codes (02101 to 02298) |
| Our office | 308 Sutton St, North Andover, MA |
| Service area | Boston and Greater Boston |
| Estimate | No-cost estimate in your home, with no obligation |
| Pairs well with | A bathroom remodel in the main house |
Cost factors
In-Law Suite Cost Factors in Boston
Each in-law suite for a Boston home is priced individually, following a visit. The cost turns on which type you choose, its size, a new build or a conversion, any kitchenette and the bathroom, a separate climate system, and permits, materials, and finishes. The scope comes in writing.
The cost depends on:
- The type of suite and its size
- A new build or a conversion
- A new foundation, when needed
Also considered:
- The bathroom and a kitchenette
- Features for accessibility
- Materials, finishes, and permits
Nearby
In-Law Suites in Towns Near Boston
Boston is one of many towns we serve with in-law suites; others include Chelsea, Revere, Everett, and Brookline, as well as most of Boston and Greater Boston. In every town, we review the rules for accessory living spaces, file the permit applications, and schedule every inspection through the walkthrough before move-in.
In-Law Suite Additions in Chelsea In-Law Suite Additions in Revere In-Law Suite Additions in Everett In-Law Suite Additions in Brookline In-Law Suite Additions in Somerville In-Law Suite Additions All Construction Services
Free estimate
Get a Free In-Law Suite Estimate in Boston
Thinking about an in-law suite at your Boston home? We come to the house, walk the lot and the existing space, go over who will live in the suite, and prepare a written estimate with the scope, materials, and next steps, with no obligation.
Questions about zoning or accessory units? Call (978) 917-9072, and we will explain attached, detached, garage, and basement suites in plain language.
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FAQ
In-Law Suite Additions in Boston: Common Questions
Families in Boston considering a suite for a relative tend to ask about four things: what permits and zoning involve, whether the suite can be detached, if a kitchen can go in, and what the first visit covers. Answers follow below, in plain words. Anything else? Call our team.
What permits does an in-law suite in Boston need?
A building permit, and in a number of towns a zoning review as well, because an in-law suite can be treated as an accessory dwelling unit. Local rules can set limits on its size, parking, and design. Our team checks those rules before design, prepares the applications, and schedules each inspection.
What types of in-law suites can you build in Boston?
We build four types: attached suites with a private entrance and an inside door, detached suites as a small separate building where zoning allows, garage conversions inside the existing footprint, and basement suites with a separate entrance and egress. The right one depends on the lot, the house, and the zoning rules, plus the needs of the person moving in.
Can an in-law suite have a kitchen?
Often, yes. A kitchen or kitchenette needs plumbing, circuits for the appliances, and ventilation. Adding a kitchen is also often what makes a suite count as a separate dwelling unit under local rules, so we check what the town allows before design is settled.
How do I start an in-law suite in Boston?
Request a free in-home consultation online or call (978) 917-9072. A member of our team visits your Boston home, reviews the lot and the house, asks about the person moving in, and explains the suite types that could fit. Your written estimate follows, with no obligation.
