Drenagh is a 19th-century house and gardens near Limavady, County Londonderry, Northern Ireland. Drenagh has been the home of the McCausland family since 1729, and the present house was built in 1835. It was the first major work by Charles Lanyon, known for his work in Belfast. The gardens include features from the 18th century, as well as an extensive 19th-century Italian garden and elements added in the 1960s. The house is a Grade A listed building.[1]