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What is BSDC?
Bay State Design & Construction is a full-service design and build firm. That means whether you came here for an ADU, a kitchen remodel, a new deck, or something you're not quite sure how to describe yet, we can help. Everything is lhandled in-house from first sketch to final inspection.
What We Do
ADU construction and beyond
Massachusetts homeowners come to us for a lot of different reasons. Some want to add an in-law suite for an aging parent. Some are looking at rental income without buying a second property. Others need a kitchen remodel, a new deck, or a full home addition. Whatever brought you here, the process is the same — we design it in-house, pull the permits, and build it ourselves. No handing off to a separate contractor halfway through. One team owns your project from the first conversation to the final walkthrough.
MEET THE DREAM TEAM
Our dynamic duo
Owner & Head of Sales
Max co-founded Bay State Design & Construction because he believes every homeowner deserves a contractor they can actually trust. Someone who shows up, communicates clearly, and delivers what they promised. When he's not meeting with clients, you'll find Max on an airplane, traveling somewhere new in the world, soaking up new places and coming home with fresh inspiration.
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Owner & Head of Project Managment
Gio co-founded BSDC for the same reason he does everything: to build something you can be proud of. Whether that's a finished project or assembling the team of professional builders to bring a dream home to life. Outside work, he's dedicated to his wife and kids. On the job, that same dedication to the people he cares about shows up with each client project.
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WHY BSDC
Why Massachusetts homeowners choose BSDC
- One team. Start to finish. No chasing architects, contractors, or permit offices. You have one person to call from first sketch to final walkthrough.
- We build to your budget. Lots of firms design the dream and hand you a surprise bill. We start with your number and plan around it.
- What you approve is what gets built.Things get lost in handoffs. We draw the plans and build to them, so nothing gets lost in translation.
- Your timeline doesn't depend on anyone else's. When design and construction are under one roof, no third party can slow us down.
- We handle everything. Finishes, fixtures, the details that make it yours. Permits, inspections, coordination? That's on us.
- 75% of our work comes from referrals. Our clients send us their family and neighbors. We work hard to keep earning that.
Service Areas
Serving Massachusetts Homeowners
We're based in Central Massachusetts and work throughout the Greater Boston area and beyond. Our service area includes Lexington and surrounding communities across Middlesex, Worcester, and Norfolk counties.
Not sure if we serve your area? Give us a call, we likely do!
Most ADU projects fail before they start because nobody checked zoning, assessed feasibility, or ran the numbers before design began. FlexUnit™ is how we fix that. It's our purpose-built ADU service, designed to take Lexington homeowners from initial idea to permitted, built, and finished accessory dwelling unit — without the guesswork.
Feasibility first
we assess zoning, code requirements, utility capacity, and realistic budget before any design work begins
Design and build under one roof
no handing off between firms, no lost translation between the plans and the build
Lexington-specific expertise
we know the permitting requirements, the zoning bylaws, and what it takes to get an ADU approved in this town
One point of contact
from first call to final inspection, you work with one team
Our feasibility and budget roadmap is a paid pre-construction phase — $3,500 credited in full if you move forward with construction. It's the step that eliminates surprises and gives you a clear picture of what your ADU project will actually take before you commit to anything.
Frequently Asked Questions
Lexington ADU Construction FAQs
We do everything — kitchen and bathroom remodels, home additions, basement finishing, decks, garages, roofing, siding, windows, doors, flooring, millwork, and commercial buildouts. ADU construction through our FlexUnit™ service is a specialty, but it's one part of a full-service design and build firm.
A home addition adds square footage to your existing home — it's connected and part of the same living space. An ADU is a self-contained unit with its own entrance, kitchen, and bathroom. Some ADUs are attached to the home, others are detached. The distinction matters for zoning, permitting, and how the space can be used.
An accessory dwelling unit is a self-contained living space on your existing property — its own entrance, kitchen, bathroom, and sleeping area. Massachusetts has made significant strides in ADU-friendly zoning in recent years. Lexington has its own specific bylaws governing ADU size, placement, and owner-occupancy requirements. We research your specific situation during our feasibility phase and advise you accordingly.
Basement conversions, garage conversions, attached additions, and detached guest houses are all possibilities depending on your lot, your home's configuration, and Lexington's zoning bylaws. We assess all of it before any design work begins.
It varies significantly depending on the type — a basement conversion costs very differently from a detached guest house. Our feasibility phase produces a realistic budget range before you commit to anything. That's the point of doing it first.
Yes. We serve homeowners and commercial clients throughout Greater Boston and Central Massachusetts. Lexington is a primary focus but we work across the region — see our full service area above.
Every project comes with a 1-year workmanship warranty. If something isn't right with our work, we come back and make it right.
REviews
Hear from happy homeowners
Great guys and easy to work with! I couldn't be happier with my beautiful new kitchen!
The best! Gave a super reasonable estimate and walked me through all the steps and timeline , finally have my (dream) kitchen.
I highly recommend Bay State Design & Construction to anyone looking for reliable, skilled, and professional construction services.
These guys are amazing! Helped me build a two story addition with a master suite and I couldn't be more thrilled with the product.
The guys from Bay State design were prompt well priced and kept my project moving without missing a step. Great work guys!
I hired these guys to build an attached garage at my house. Throughout the entire process they went above and beyond all expectations and their pricing was super fair.
This team is very professional, communicative and great to work with. Gio provided comprehensive building plans for me within a short timeframe, as promised.
Ready to explore what's possible on your property?
Tell us about your project and we'll take it from there.