No Man’s Fort was built between 1867 and 1880 to protect Portsmouth from Napoleon III and will now be available for corporate events, conferences and overnight stays from 10 November 2014.
The venue will have 22 bedrooms and events space for up to 200 people.
The fort will also boast two helicopter pads, a nightclub, laser tag, games rooms, snooker room, rooftop hot-pool, lighthouse, gallery restaurant, wine bar and spa facilities.
No Man’s Fort will have a special party night package called Fort Du Soleil, which starts with a boat ride from Gunwharf Quays in Portsmouth, followed by a drinks reception and four-course dinner. There will also be a Sunday lunch experience.
No Man’s Fort is owned by AmaZing Venues and is the larger sister venue to Spitbank Fort, which has been open since 2012.