The Delaware Legislative Hall is the state capitol building of Delaware. Located in the state capital city of Dover on Legislative Avenue, it houses the chambers and offices of the Delaware General Assembly. It was designed in the Colonial Revival architecture style by E. William Martin and Norman M. Isham, and built 1931–1933, with wings added in 1965–1…The Delaware Legislative Hall is the state capitol building of Delaware. Located in the state capital city of Dover on Legislative Avenue, it houses the chambers and offices of the Delaware General Assembly. It was designed in the Colonial Revival architecture style by E. William Martin and Norman M. Isham, and built 1931–1933, with wings added in 1965–1970 and 1994.