Sometimes your home just needs a little more room to fit your growing needs. Whether your family is expanding, you’re working from home more often, or you simply want extra living space, a thoughtfully designed home addition can give you the space you need while allowing you to stay in the home and neighborhood you already love.
At Underdog Construction, we help homeowners throughout Northeast Massachusetts and Southern New Hampshire design and build custom home additions that feel like a natural extension of the existing house. From single-room additions to multi-room expansions, we handle the entire process with care, precision, and attention to detail.
Custom Home Additions
Adding onto your home is a major investment and every addition project is unique. That’s why we take a personalized approach to every design, ensuring the new space blends seamlessly with your existing structure, both inside and out.
Our home addition services include:
Family Room Additions
Create extra living space for entertaining, relaxing, or spending time together with a bright, spacious family room addition that feels open, inviting, and fully integrated with your home’s existing layout.
Bedroom Additions
Whether you need an additional bedroom for a growing family, overnight guests, or aging parents, we can design and build new bedroom spaces that feel comfortable, private, and well-connected to the rest of your home.
Master Suite Additions
If your current primary bedroom lacks space, privacy, or comfort, we can create a full master suite addition complete with walk-in closets, ensuite bathrooms, and upgraded amenities to give you the retreat you’ve always wanted.
Home Office & Workspace Additions
As remote work continues to grow, many homeowners are looking for dedicated home office space. We design home office additions that provide privacy, functionality, and the professional environment you need to work comfortably from home.
In-Law Suites & Guest Apartments
For multi-generational living or frequent guests, an in-law suite or guest apartment addition can provide a private, fully functional living space while keeping loved ones close.
Sunrooms, Three-Season Rooms & Enclosed Porches
Enjoy more natural light and indoor-outdoor living with a sunroom or three-season room addition. These spaces are perfect for relaxing, entertaining, or simply enjoying the views year-round.
Garage & Mudroom Additions
Add storage, organization, and functionality to your home with garage expansions, attached garages, or mudroom additions that make daily routines easier and more efficient.
Why Consider a Home Addition
A home addition offers many long-term benefits for homeowners who want to stay in the home they love while improving functionality and comfort:
- Increased Living Space – Gain usable square footage without moving.
- Custom Solutions – Build exactly what your family needs today and in the future.
- Enhanced Home Value – Thoughtful additions often increase property value.
- Better Functionality – Create spaces that better fit your daily routines.
- Cost-Effective Alternative to Moving – Stay in your neighborhood and avoid the hassle of buying a new home.
- Tailored Design – Match the addition to your home’s existing style for a seamless look.
At Underdog Construction, we approach every addition with careful planning to ensure the finished project not only looks like it was always part of your home — but functions that way too.
Experience the Underdog Advantage
Home additions require careful coordination, thoughtful design, and high-quality craftsmanship. At Underdog Construction, we handle every step of your addition project with honesty, attention to detail, and respect for your home.
When you work with us, you’ll benefit from:
- Direct communication with owner Wade Cedar throughout the entire project
- Honest pricing and clear expectations from start to finish
- Skilled, insured, and professional crews
- Attention to both construction quality and design details
- Clean, respectful job sites that minimize disruption to your daily life
- Long-lasting workmanship you can trust for years to come
We treat every home as if it were our own, delivering reliable service and craftsmanship you can feel confident in.
Let’s Start Planning Your Home Addition
Home additions require careful coordination, thoughtful design, and high-quality craftsmanship. At Underdog Construction, we handle every step of your addition project with honesty, attention to detail, and respect for your home.