Addition Contractor

Welcome to Finish Masters Builders Corp — Your Trusted Experts for Home Additions in Massachusetts & New Hampshire!

We’re glad you’ve found your way to Finish Masters Builders Corp, where your home’s potential is reimagined, expanded, and brought to life through expert craftsmanship. Whether you’re dreaming of a sunroom in Chelmsford, MA, an in-law suite in Hudson, NH, or a spacious master bedroom addition in Acton, our family-owned business is here to turn your vision into a permanent part of your home.

For homeowners searching for “home addition contractors near me” in Massachusetts or New Hampshire, you’ve come to the right place. At Finish Masters, we specialize in seamless home expansions—from single-room additions and bump-outs to full second-story builds and garage conversions. We’re fully licensed and insured in both states, and we deliver every project with integrity, transparency, and precision.

Adding onto your home isn’t just a structural upgrade—it’s a transformation of how you live, work, and relax within your space. At Finish Masters, we understand that a home addition must be both functional and beautiful, blending into your existing structure while dramatically enhancing your lifestyle and property value.

As you explore our services, envision the new possibilities that come with a professionally designed and built addition: more room for family, custom living spaces, and the freedom to stay rooted in your neighborhood without the need to move. We handle everything from design and permitting to construction and final walkthrough, keeping you informed every step of the way.

Feel free to browse our portfolio of past home addition projects throughout MA and NH—each one a testament to our commitment to detail, durability, and design excellence. Whether you prefer a traditional aesthetic or a bold, modern layout, our team works collaboratively to bring your style and needs into the architecture of your expanded home.

Have questions about starting the process? Want to understand how we structure timelines and estimates? We’re ready to guide you through our step-by-step process, beginning with a personalized consultation to ensure every square foot we build is aligned with your goals.

Thank you for considering Finish Masters Builders Corp for your home addition project. Let’s build the space your home has been missing—with care, craftsmanship, and a commitment to quality that lasts a lifetime.

What Can We Build for You?

At Finish Masters Builders Corp, we don’t just add square footage — we expand your lifestyle. Whether you’re running out of room or simply want to customize your home for the way you actually live, our expert team is ready to help you design and build the ideal home addition. Here’s what we specialize in:

Bedroom or Master Suite Additions

Outgrown your existing bedroom setup? We build luxurious master suites and spacious guest bedrooms with walk-in closets, private bathrooms, and custom layouts tailored to your lifestyle. Ideal for growing families, aging in place, or creating a peaceful retreat in your Massachusetts or New Hampshire home.

In-Law Apartments / Secondary Dwellings

Multigenerational living is on the rise — and our in-law suites and accessory dwelling units (ADUs) are designed to offer privacy, comfort, and independence for loved ones. From separate entrances and kitchens to accessible bathroom layouts, we make sure your extended family feels right at home.

Kitchen Expansions

Need more room to cook, entertain, or just breathe? A kitchen bump-out or full kitchen addition can transform the heart of your home into a modern, open-concept culinary space. We’ll help you reimagine your floor plan, increase cabinetry and counter space, and seamlessly blend the new area into your existing layout.

Garage Conversions

Convert your underused garage into valuable living space — whether it’s a home office, gym, media room, or guest quarters. We specialize in creative garage transformations that maximize your property’s footprint without altering its curb appeal.

Sunrooms & Enclosed Porches

Bring the outdoors in with a sunroom, three-season porch, or four-season addition designed to flood your home with natural light while providing year-round comfort. Whether it’s for relaxing, reading, or entertaining, this is one of the most rewarding upgrades for New England homes.

Two-Story Additions

Ready to go big? Our two-story additions add entire new levels to your home, doubling your space while keeping your foundation intact. These large-scale additions are perfect for families needing several new bedrooms, bathrooms, or a completely reimagined layout.

Home Offices or Creative Studios

Whether you’re working remotely or pursuing a passion project, a custom home office or studio space gives you the quiet, personalized environment you need. We build sound-insulated, light-filled additions with all the functionality and aesthetics you’d expect from a professional workspace—right in your backyard.

Each project is tailored to your specific needs, property layout, and long-term goals. From zoning requirements to architectural design, we handle it all. At Finish Masters Builders Corp, we’re not just building additions — we’re building the future of your home.

Building Codes & Regulations: What You Need to Know

At Finish Masters Builders Corp., every home addition is designed and built to meet or exceed all local and state regulations. Whether you’re in Massachusetts or New Hampshire, we prioritize compliance, permitting, and structural safety from day one.

Before breaking ground, our team reviews and adheres to all relevant guidelines outlined in the Massachusetts State Building Code (780 CMR) and the New Hampshire Department of Safety regulations. These building standards ensure that your new addition not only enhances your living space—but also passes inspection and stands the test of time.

We invite our clients to become informed partners in the process. For more information, you can explore these official resources:

• 🔗 Massachusetts State Building Code – 780 CMR

• 🔗 New Hampshire Building Permits – Department of Safety

These references can help you better understand how zoning, structural loads, energy codes, and fire safety considerations shape the design and approval process for your addition.

Why Homeowners Trust Finish Masters Builders Corp

At Finish Masters Builders Corp, our reputation for excellence isn’t built on ads or promises—it’s built on results, trust, and lasting relationships with homeowners across Massachusetts and New Hampshire. When it comes to something as significant as expanding your home, here’s why so many families confidently choose us:

Proven Expertise in Complex Home Additions

We’re not generalists dabbling in additions—we’re specialists. Whether it’s integrating a new second story, working around existing foundations, or navigating tight zoning setbacks, we bring structural and architectural expertise that ensures every square foot is code-compliant, beautifully integrated, and built to last.

A Family-Owned, Local Business

As a family-run company based in Billerica, MA, we take personal pride in every project. We live in the same communities we build in, and we treat your home with the care and respect we’d want for our own. Our clients are our neighbors, and that accountability drives us to deliver excellence—every time.

Design-First Process

Unlike many contractors who rush to the build phase, we emphasize design, clarity, and collaboration first. Through structured planning meetings, working drawings, and detailed architectural layouts, you’ll understand the full vision and scope of your addition before we ever swing a hammer. We don’t guess—we design.

Transparent Contracts & Payment Schedules

No hidden fees. No vague timelines. From the moment we enter into a design agreement, you’ll know exactly what to expect—including itemized budgets, payment schedules, and contract documents that protect both parties. This transparency ensures peace of mind throughout your project.

Real-Time Project Tracking

Once you’ve signed off on the contract, you’ll receive private access to our online customer portal—where you can monitor your project’s schedule, communicate directly with our team, view photos, and track milestones. It’s your command center for everything Finish Masters.

Unmatched Attention to Detail

We don’t cut corners—we finish them. From matching exterior materials to seamlessly integrating HVAC, plumbing, and electrical systems, our finish work is as impressive as our framing. Our clients consistently praise our craftsmanship, cleanliness, and commitment to perfection.

Full-Service From Concept to Completion

From zoning applications to architectural renderings, demolition, construction, and final inspection—we handle every aspect of your addition project under one roof. You won’t need to juggle architects, engineers, and multiple trades. One contract, one team, one streamlined process.

Finish Masters Builders Corp isn’t just a contractor—we’re your home addition partner. Whether you’re looking to add space for a growing family or finally create the custom kitchen or suite you’ve always dreamed of, we bring the vision, expertise, and dedication it takes to make it happen.

Let’s build your future—together.

FAQs – Home Additions, Remodeling, In-law Apartments- ADU’s