Ballar Bunder Gatehouse is a Grade I Heritage structure that has been converted into a maritime museum, located at Ballard Estate in the old Fort area of Mumbai, India. It was built in 1920 to commemorate the realignment of the harbour and is located where Ballard Pier, a small pier once existed with an approach jetty at right angles to the pier. The building was among the five entries from the Mumbai for the 2009 UNESCO Asia-Pacific Heritage Awards for Culture Heritage Conservation. It is one of the stops on Special tour of Museums in the city, a tour organised by BEST and MTDC as well as the Naval Dockyard Heritage Walk, conducted by the Naval Dockyard on the first Sunday of every month.