The National Park Service has approved a 120-acre expansion of Charleston's East End Historic District.
City planners announced the park service's decision Wednesday. The boundary expansion became effective Dec. 16.
A 2014 consultant's survey found that more than 400 structures in the expanded area contribute to the neighborhood's historic nature.
Property owners in the district's expanded area will be eligible for tax credits for rehabilitation of historic properties.
The original district was created in 1978.