[1] The Portuguese built a stockade made of palm trees to house the Governor of the fort, with bamboo matting and scaffolding.

They also constructed an artillery fortification, and established a Mission of Dominican Friars to convert the local residents.

[2] In the 1730s, Chimaji Appa, a commander of the Maratha Army and brother of Baji Rao I, began a campaign to conquer the Western Coast of Maharashtra under the Maratha Empire, such as attacking and controlling Belapur Fort in the year 1733.

[1] Approximately after the fort's capture by the Marathas, The Peshwa granted the fortress to the custodianship of Vikaji Mehrji, whose descendants, the Chorge family, continue to hold.

A description of the fort in the year 1728 by the Portuguese yielded that it was heptagonal in shape, and had 4 redoubts.