Keith Mercier

Keith Mercier is a licensed New Hampshire Realtor specializing in commercial property and business brokerage, backed by 40 years of experience in construction, building systems, and entrepreneurial operations. Before entering real estate as a licensed professional, Keith spent decades founding, operating, and ultimately selling a successful mechanical contracting company, as well as being a member of the NH State Mechanical Board— experience that gives him rare insight into the operational, structural, governmental and financial realities behind commercial assets and small businesses.
His background spans project management, systems engineering, business development, and real-world ownership, allowing him to evaluate properties and businesses with both technical precision and strategic clarity. Keith has also spent years flipping homes and investing in real estate, giving him a practical investor’s mindset that benefits buyers, sellers, and business owners alike.
Whether representing a commercial building, home, a mixed-use property, or a business preparing for transition, Keith is known for his analytical approach, straightforward communication, and commitment to helping clients make confident, well-informed decisions.