Daniel Marchand Costello

The founder and partner of Costello, P.C., Daniel Marchand Costello is a transactional and civil litigation attorney advocating for the rights of individuals and businesses across Washington, D.C., Maryland and Virginia. His portfolio encompasses a dynamic range of legal services, including those involving community association practice, landlord-tenant matters, construction law, real estate, condominiums and cooperatives, general litigation and collection services.

Mr. Costello's approach to legal representation is marked by a deep understanding of the intricacies of community associations. He is adept at guiding board members to achieve their community's aspirations within the framework of the governing documents and prevailing laws. His ability to elucidate legal concepts ensures that associations operate effectively and in compliance with legal requirements. His skill set extends to drafting and amending governing documents, enforcing rules, managing the collection of assessments and addressing the challenges of aging infrastructure.

Before founding his practice, Mr. Costello honed his skills at a prominent regional law firm recognized for its prowess in community association law and litigation. His educational background is equally impressive, with a Bachelor of Arts degree from the University of Mary Washington, where he graduated cum laude. He then went on to earn his Juris Doctorate from the George Washington University Law School.

Mr. Costello is a native of Washington, D.C., and maintains a strong presence in the legal community through his admissions to several bars including Maryland, the District of Columbia and Virginia. He is a member of the Montgomery County Bar Association, the Maryland State Bar Association, the District of Columbia Bar Association, the American Bar Association, the National Association of Housing Cooperatives and the Potomac Association of Housing Cooperatives.