The OPW provides a shared service in the area of property management and property maintenance incorporating architectural, engineering, valuation, quantity surveying, project management and facilities management services to central Government Departments and Agencies. OPW is the leading agency in the country in the areas of conservation and the presentation of cultural and heritage properties.

The Office is responsible for some 780 National Monuments such as Newgrange and the Rock of Cashel. It also manages some of the most prestigious Historic Properties in the Country, e.g. Dublin Castle and Castletown House. A Business Transformation Unit has been established to address the recommendations arising from the Capacity and Capability Review of the Estate Portfolio Management function completed in 2014.