AlphaCon Building Group is a family-owned builder and remodeling company based in Hudson, New Hampshire, led by owner Derek Leclair. The company says it has been building and remodeling homes for more than 30 years across Southern New Hampshire and Northern Massachusetts, with work spanning custom homes, additions, kitchens and baths, finished basements, garages, decks, roofing, siding, windows, doors and accessory dwelling units.
The recent customer history is consistently positive. In 2026, homeowners described an ADU completed on time and on budget, an 820-square-foot basement finished into living space, an office window replacement, siding completed nearly a week early, and a roof replacement where Derek explained material choices and stayed responsive. Earlier reviews describe kitchen remodeling, a 12-by-16 composite deck, a porch converted into a sunroom, a custom home, an in-law apartment with a three-car garage, and repeated interior and exterior projects. Across these accounts, customers repeatedly mention communication, scheduling, cleanup, workmanship and returning to AlphaCon for additional work.
Before booking, confirm the exact scope and which trades will be handled by AlphaCon or subcontractors; one 2023 homeowner specifically mentioned subcontractors for electrical, plumbing, painting and flooring, while another praised Derek's management of many subcontractors. Ask for the written schedule, finish date, materials and warranty terms, particularly for roofing, siding and exterior openings.
AlphaCon looks suited to homeowners planning a substantial remodel, addition, custom home, ADU or coordinated exterior project who want one team managing design and construction. Confirm the project plan, permits, trade responsibilities and payment schedule in writing before work begins.
