About

Sean Ryan Marciniak is a seasoned attorney with Miller Starr & Regalia PLC in Walnut Creek, California, where he focuses his practice on land use and zoning, litigation, environmental and natural resources matters, and state, local, and municipal law. With a deep understanding of the legal and regulatory issues that shape development, governance, and land use planning, he helps clients navigate complex matters that often require both strategic insight and practical problem-solving. His work is informed by a strong command of California’s evolving legal landscape and a commitment to delivering clear, effective counsel. Mr. Marciniak brings a thoughtful, client-centered approach to every matter, working closely with individuals, businesses, public agencies, and other stakeholders to address challenging legal issues with precision and care. Whether guiding clients through entitlement and zoning considerations, litigation, or disputes involving environmental and natural resources concerns, he is known for focusing on efficient solutions that align with each client’s goals. His practice reflects a broad understanding of the interplay between land use, public policy, and municipal regulation, making him a valuable resource for clients facing high-stakes legal decisions. Based in Walnut Creek, Mr. Marciniak is part of a respected firm serving clients throughout California. He is committed to providing professional, responsive, and strategic representation in matters involving land use, zoning, litigation, and municipal law.

Credentials

Recognition & Involvement

Related Legal Services

Other L Use Zoning Attorneys in Walnut Creek, CA