Rockland Harbor Southwest Lighthouse was privately built by Dr. Bruce Woolett between 1981 and 1987. After being completed and equipped with a lens, the lighthouse was recognized by the Coast Guard as a private aid to navigation marking nearby Seal Ledge.
John Gazzola purchased the property from Dr. Woolett in 1998 and embarked on an extensive renovation of the lighthouse. A fifth-order Fresnel lens used at Doubling Point Range Lights was installed in the lighthouse in 1989.
- The Lighthouses of Maine, Jeremy D'Entremont, 2009.