Thomas Downey, Ltd. is a specialty consulting engineering firm providing assessment of existing buildings and structures. Thomas Downey, Ltd. (TDL) is a specialty consulting engineering firm providing assessment of existing buildings and structures. We analyze building conditions, identify and evaluate defects, perform forensic investigations, develop repair and restoration plans and assist property owners in planning and capital budgeting. Established in 1979, the firm has become one of the most trusted resources for researching and analyzing building conditions and resolving related performance problems in the Metropolitan Washington, DC and the Mid-Atlantic areas. All major building community stakeholders – owners and managers, community associations, law firms, insurance companies, developers and contractors – rely on the TDL engineering team. TDL provides a comprehensive menu of services, including building investigation and condition assessment, warranty and reserve study preparation, repair design, expert witness and litigation technical support and cost estimating. The firm’s engineers are registered to practice in the District of Columbia, Kentucky, Maryland, North Carolina, Pennsylvania and Virginia.