Construction on the Southwest Ledge Lighthouse started in 1873 and was finished in 1877.
The superstructure originally intended for this light was put on display at the Philadelphia Exposition of 1876; in order to more quickly finish the light, however, a duplicate superstructure was built and installed at this light.
The original house remained at the exposition until its close, and was then used for the Ship John Shoal Light in Delaware Bay.

The foundation of the lighthouse was reinforced in 1911, and boat cranes (of which only foundations remain today) were added in the 1930s to facilitate access.
 The lighthouse was automated in 1973, and remains an active aid to navigation.
 It was placed up for sale in August 2016, and was sold to Dr. Casey Jordan of Beacon Preservation, Inc., in September 2016.
Construction on the Southwest Ledge Lighthouse started in 1873 and was finished in 1877. The superstructure originally intended for this light was put on display at the Philadelphia Exposition of 1876; in order to more quickly finish the light, however, a duplicate superstructure was built and installed at this light. The original house remained at the exposition until its close, and was then used for the Ship John Shoal Light in Delaware Bay.
The foundation of the lighthouse was reinforced in 1911, and boat cranes (of which only foundations remain today) were added in the 1930s to facilitate access.  The lighthouse was automated in 1973, and remains an active aid to navigation.  It was placed up for sale in August 2016, and was sold to Dr. Casey Jordan of Beacon Preservation, Inc., in September 2016.
Southwest Ledge Light