Peter Moustakis

Peter Moustakis is the Founder and Managing Member of Sowerby & Moustakis Law, an estate planning and elder law firm serving clients throughout southern New Hampshire and Massachusetts. Known for his personable approach and commitment to clarity, Peter helps individuals and families build customized legal plans that provide peace of mind, structure, and lasting protection for future generations.

Licensed to practice law in both New Hampshire and Massachusetts, Peter focuses on estate planning, probate administration, trust administration, elder law counseling, and pet trust planning. His mission is straightforward: to do the right thing for every client. Whether drafting a will, creating a trust, or settling an estate, Peter ensures that every client understands each step of the process and feels confident in their decisions.

Clients describe Peter as approachable, compassionate, and easy to talk to. He believes that effective legal guidance begins with listening. Each consultation starts by understanding what matters most to the client, then developing solutions that meet their personal goals. Many clients leave his office saying the experience was far easier and more comfortable than they expected, which is exactly the outcome Peter strives for.

Peter’s philosophy centers on collaboration and education. He avoids one-size-fits-all planning and instead tailors each estate plan to the unique circumstances of the family or business involved. By combining his knowledge of estate planning and business law, he helps small business owners protect both their companies and their personal assets. This integrated approach makes Sowerby & Moustakis Law one of the few firms in New Hampshire that unites personal and business legal strategies under one roof.

Within the legal community, Peter is respected for his leadership and professional integrity. He currently serves as President of the New Hampshire chapter of the National Academy of Elder Law Attorneys (NAELA), where he promotes best practices and client-centered standards in elder law. His leadership role reflects both his dedication to continuous learning and his commitment to advancing the profession.

Peter’s clients include couples with children, retirees, horse and pet owners, and small business owners who want thoughtful and efficient planning. His firm’s Five Step Estate Planning Legacy System ensures that every plan is thorough, easy to follow, and aligned with each client’s goals. The result is a sense of calm and readiness that carries forward for years to come.

Outside the office, Peter enjoys spending time with his family and participating in community activities throughout New Hampshire. He takes pride in knowing that his work helps families, individuals, and even their beloved animals feel secure about the future.

Peter Moustakis has built his reputation on compassion, clarity, and trust. For him, estate planning is about more than legal documents. It is about relationships, guidance, and the peace of mind that comes from knowing everything has been planned the right way.