Design. Build. Remodel. Manage.
Thoughtfully Designed Home Additions
& Remodeling Built to Last
Across Southern NH & Northern MA
From custom home additions and ADUs to kitchen remodels and whole-home renovations, Alphacon Building Group creates beautiful, functional spaces tailored to the way your family lives. For over 30 years, we’ve delivered premium craftsmanship, reliable communication, and high-quality execution across every phase of construction.
Proudly serving homeowners throughout Windham, Bedford, Hudson, Pelham, Nashua, Hollis, and surrounding Southern NH & North Shore communities.
Home Building & Remodeling Craftsmanship You Can Trust
Expand your footprint or re-imagine space with structural expertise and meticulous finishes.
Ground-up builds with premium materials, architect collaboration, and white-glove project management.
Thoughtful layouts, modern cabinetry, countertops, and finishes designed to create a functional kitchen that enhances everyday cooking and gathering.
Efficient layouts, stylish vanities, tile, and fixtures that transform your bathroom into a comfortable and refreshing space for daily living.
Create an outdoor space built for New England weather. From composite to custom deck layouts, We offer it all!
Convert your lower level into a functional living area, family room, office, gym or whatever your dream basement is.
Whether you need an attached garage, detached structure, workshop space or a full rebuild, we build garages that match your home’s style
We install and replace roofs, vinyl siding, Hardie board, and other premium materials that boost long-term structural integrity.
We offer energy-saving replacements and custom fits designed to improve insulation and reduce drafts.
We proudly build custom ADUs throughout Southern New Hampshire and Northern Massachusetts.
Planning
Plan & Design the Right Way
Every project starts with a detailed conversation about your goals, budget, and timeline. We help refine your ideas, coordinate with architects when needed, and plan each phase.
On-Site Management
Your job site is overseen by a dedicated project manager who coordinates & monitors quality. We’re known for neat, organized job sites and careful attention to craftsmanship and materials.
Finish
Warranty
When construction is complete, we walk through the project with you, address any final details, and ensure everything meets your expectations.
Proven Home Builders You Can Trust | Southern NH & Northern MA
Homeowners choose Alphacon because we bring deep local expertise across Southern NH and Northern MA, are fully licensed and insured, and deliver premium workmanship with clear daily updates. Every project is managed on-site, priced transparently, and completed with respect for your home, your time, and your vision. We’re proud to give back to the neighborhoods that have trusted us for years by sponsoring local youth sports and activities across New Hampshire.
We Proudly Support Our Local Community
Hudson Girls Softball League
Pelham Soccer Club
Some of Our Recent Home Building and Remodeling Work
See the quality, craftsmanship, and attention to detail that set Alphacon Building Group apart. From full exterior remodels to custom roofing, siding, and garage builds, our work showcases the level of excellence homeowners across Southern New Hampshire trust us for. Each project reflects our commitment to durability, design, and a seamless client experience.
Areas We Serve
- Essex County, MA, USA
- Middlesex County, MA, USA
- Rockingham County, NH, USA
- Hillsborough County, NH, USA
Testimonials
Hear It From Our Clients
A Sample of The Brands We Work With
Blogs
How Much Does a Home Addition Cost in Southern New Hampshire in 2026?
How Much Does a Home Addition Cost in Southern New Hampshire in 2026? One of the most common questions we
In-law Apartments – New Hampshire’s New ADU Law: What Homeowners Need to Know
New Hampshire homeowners now have more freedom than ever to build Accessory Dwelling Units (ADUs) such as an in-law apartment
Best Time of Year to Build a Home Addition in New England
Planning a home addition is a major investment, and choosing the right time of year can impact cost, timeline, and
Design-Build vs General Contractor
When planning a home remodeling or construction project one of the first decisions homeowners face is choosing the right project
Tips for Choosing a Custom Home Builder in Southern NH
Building a custom home is one of the most rewarding — and most complex — projects a family can take
Room Addition Ideas for Small Homes That Actually Work
Running out of space in your home does not automatically mean you need to move. For many homeowners, the smarter