Meet the Team

Mark Gallagher
Seal Harbor Development
1 Nagog Woods
Acton, MA 01720


Mark has been developing land and constructing homes in the New England area since 1982. Services throughout the years have included:

Restoration and remodeling – Restored several “period” homes from as early as 1735 through the late 1800s

Development – Purchase land and plan developments from permitting and consulting through road construction

New homes – Design and build of new homes from 400 square feet to over 10,000 square feet

Commercial – Construction of hotel units and cottages as well as commercial buildings

After care – Care of your home or investment after the sale

Amanda Tanguay
Phone: (207) 423-2394

Amy Sainteloi - Masiello Group

Amy Sainteloi
Phone: (207) 423-1069


Introducing the Gold Key Team with Better Homes and Gardens Real Estate The Masiello Group: Unlocking Real Estate Dreams in Maine and New Hampshire

Meet Amy Sainteloi and Amanda Tanguay, the dynamic duo behind the Gold Key Team, dedicated to turning your real estate dreams into a reality. With their extensive knowledge of the Maine and New Hampshire markets, Amy and Amanda bring a wealth of experience and a personal touch to every transaction.

Amy and Amanda form an unstoppable force in the real estate market. Their shared values of integrity, professionalism, and dedication are the pillars of their success. By combining their expertise, they offer a comprehensive suite of services. The Gold Key Team has the knowledge and resources to guide you through every step of the process.

Beyond their exceptional real estate services, Amy and Amanda are deeply rooted in their communities. They understand the importance of giving back and actively participate in local charities and organizations. Their commitment to making a positive impact extends beyond the world of real estate.

If you are ready to embark on your real estate journey in Maine or New Hampshire, put your trust in The Gold Key Team. With their unwavering dedication, unparalleled expertise, and genuine care for their clients, Amy Sainteloi and Amanda Tanguay are the key to unlocking your real estate dreams. Contact them today and experience The Gold Key difference.

Masiello Group
The Gold Key Team - Masiello Group