Brian P. Donnelly
Werther & Mills, LLC is a law firm serving clients in Washington DC and Maryland
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Brian P. Donnelly

Direct: 240.912.3034
Fax: 240.912.3031

I am a litigator and trial lawyer with more than a decade of experience guiding companies and individuals through business and governmental disputes. My practice includes both commercial and administrative litigation.


On the commercial side, I have successfully represented companies of all sizes in business and employment disputes in state and federal courts. I am especially adept at litigating internal company disputes involving partnerships and limited liability companies. I have extensive experience navigating the complex web of jurisdictions in the D.C. Metropolitan Area, which includes numerous federal and state courts in Maryland, Virginia, and the District of Columbia.


On the administrative side, I have litigated several precedent-setting cases involving federal tax credits and other governmental programs, including Low Income Housing Tax Credits (LIHTCs), renewable energy Production Tax Credits (PTCs) and Investment Tax Credits (ITCs), and affordable housing programs run by the U.S. Department of Housing and Urban Development (HUD) and the U.S. Department of Agriculture Rural Development office (USDA RD). I also litigate civil claims against the federal government in the U.S. Court of Federal Claims.


I am a former U.S. Marine Corps officer and a veteran of the second Iraq War. I have provided pro bono representation to military veterans and veteran-serving organizations throughout my legal career.


I earned my law degree from Columbia University School of Law. I hold a bachelor’s degree in Economics and American Studies from Cornell University and master’s degrees in International Relations and Communication from the University of Oklahoma. Originally from New Jersey, I am a proud member of the South Plainfield High School Hall of Fame.


Member of the Maryland, DC and Virginia Bar Associations

Speaking Engagements

  • Presenter, “LIHTC Exit-Dispute Litigation Update – Fall 2022”
  • Presenter, “LIHTC Exit-Dispute Litigation Update – Fall 2021”

Representative Matters

  • Obtained successful trial verdict in litigation to prevent general partner’s unlawful appropriation of limited partnership interests in $8 million multi-family housing property in Richmond, Virginia.
  • Obtained successful trial verdict for installer of rooftop solar panels on government claims to recapture grant payments in lieu of energy tax credits under Section 1603 of the American Reinvestment and Recovery Tax Act of 2009 (ARRA).
  • Obtained dismissal of owner of Florida multifamily housing property in litigation brought by multiple tenants alleging violation of Administrative Procedure Act (APA) and other claims in connection with removal by U.S. Department of Agriculture (DOA) of rent restrictions under Section 515 of Housing Act of 1949.
  • Obtained dismissal of multiple claims against title company in case brought by condominium purchaser under D.C. Consumer Protection Procedures Act (CPPA) and D.C. Tenant Opportunity to Purchase Act (TOPA).
  • Resolved multiple investigations by D.C. Attorney General relating to alleged violations of D.C. Drug-, Firearm-, or Prostitution-Related Nuisance Abatement Act.