Quality Craftsmanship for Every Corner of Your Home
Delivering reliable, high-quality construction services in Southern New Hampshire and Northern Massachusetts.
Your home deserves a team that treats every project with precision, honesty, and pride. With decades of experience, Alphacon provides complete home remodeling and building solutions — all backed by transparent communication, licensed professionals, and workmanship that stands the test of time. Whether you’re updating your exterior, renovating a kitchen, or adding more space to your home, we bring your vision to life with care and craftsmanship.
Built To Last
Our Services
Building your dream home starts with a seamless, transparent process. We collaborate with architects, engineers, and homeowners to create fully customized homes built with premium materials and industry-leading craftsmanship. From foundation to finishes, every detail reflects durability, comfort, and long-term value.
Our custom decks and porches are built to stand up to New England weather year-round. Whether you prefer composite, pressure-treated, or a fully custom layout, we design outdoor spaces that expand your living area and improve your home’s curb appeal. Every build is engineered for strength, safety, and longevity.
Whether you’re expanding your footprint or upgrading outdated rooms, our remodeling team delivers structural expertise and beautiful finishes. We handle everything from design coordination to final walkthroughs, ensuring your new space blends seamlessly with the rest of your home. Add value, functionality, and comfort.
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.
Unlock the full potential of your lower level. We design and finish basements as living rooms, in-law spaces, home offices, gyms, playrooms, and more. With moisture control, proper insulation, and custom layouts, we deliver a warm, comfortable space that feels like a natural extension of your home.
Protect your home with high-performance roofing and siding built for New England’s harsh climate. We install asphalt shingles, vinyl siding, Hardie board, and other premium materials that enhance appearance and long-term structural integrity. Our installation meets strict industry standards for durability and weather resistance.
Our energy-efficient windows and doors are designed to keep your home sealed, insulated, and protected. We install replacements, upgrades, and custom-fit options that reduce drafts and improve efficiency. Boost comfort, curb appeal, and long-term energy savings.
From attached garages to detached workshops and full structural rebuilds, we construct garages that match your home’s style and improve your property’s utility. Our builds are designed for durability, storage needs, and future resale value. Expand your space with a garage that fits your lifestyle.
Accessory Dwelling Units (ADUs)
Whether you’re planning a detached backyard cottage, an in-law apartment, garage conversion, or private living space for aging parents or adult children, Alphacon Building Group can help design and build an ADU that fits your property, your family, and your long-term goals.
Built on Trust
Why Homeowners Choose Alphacon?
Every project is delivered with unmatched craftsmanship, premium materials, and a customer experience built on transparency, communication, and trust. From the first consultation to the final walkthrough, your home is treated like our own.
Testimonials
Hear It From Our Clients
Service Area
Delivering Excellence to Hudson NH & Beyond
Alphacon Building Group proudly serves homeowners across Southern New Hampshire, Northern Massachusetts and the surrounding area, delivering high-quality home building, remodeling, and exterior improvement services. Our team combines local expertise with premium craftsmanship to support the communities we know best.
Service Area
Hudson, NH
Bedford, NH
Londonderry, NH
Windham, NH
Pelham, NH
Hollis, NH
Merrimack, NH
Litchfield, NH
Salem, NH
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 hear from homeowners is about Home Addition Cost: “Should we add onto our current home, or should we move?” The answer depends on your goals, budget, and how much you love your current home. In many cases, a well-planned addition can be significantly more cost-effective than buying a larger house—especially in today’s Southern New Hampshire housing market. What Does a Home Addition Cost in 2026? In 2026, most fully finished home additions in Southern New Hampshire fall between $175
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 thanks to a major statewide law change that officially took effect on July 1, 2025. For years, ADUs — often called in-law apartments, backyard cottages, garage apartments, or granny flats — were heavily restricted in many New Hampshire towns. Some municipalities only allowed attached units, while others imposed strict zoning requirements that made detached ADUs difficult or impossible to build. That has now changed. What Changed Under the New Law? Under New Hampshire House Bill 577, municipalities are now
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 overall project success. In New Hampshire, seasonal weather plays a significant role in construction, from frozen winter ground to humid summer conditions. Alphacon Building Group LLC helps homeowners plan additions strategically so projects move forward efficiently, regardless of the season. This guide outlines the advantages of building during each time of year. Why Timing Matters for Home Additions Weather conditions affect multiple stages of construction, including: Choosing the right season helps minimize delays and ensures smoother construction. Spring (March