From 10 November, the fort will be bookable for overnight stays, events and meetings. It will have 22 bedrooms, catering capacity for 200 people, two helicopter pads, a nightclub, games room, snooker room, meeting space, rooftop pool, restaurant, wine bar, spa with treatments, and laser tag facilities.
No Man's Fort is the second of the three sea forts owned by Amazing Venues (whose parent company is Clarenco) to open as a hospitality destination. The other properties comprise the already-open, 16-bedroom Spitbank Fort, and as yet-unopened Horse Sand Fort, which is currently undergoing renovation.
Guests will be able to start their No Man's Fort journey with a boat ride from Gunwharf Quays, Gosport, and choose from a selection of packages.
These will include the £150 "Fort du Soleil", which includes an evening boat ride to the fort, welcome drink surrounded by acrobatic performers, and a four-course dinner, followed by music and dancing in the bar, and access to the fort's additional facilities.
There will also be a vodka luge, plus a drink of rum hot chocolate and marshmallows round a fire pit, before a boat trip back to the mainland at midnight.
Another package, called the "Rule Britannia Banquet", will cost £99 and feature boat rides to and from the mainland, plus a welcome drink, canapés, and a three-course beef banquet with music. Guests will also be able to stay overnight or for a longer stay, and also have the choice to arrive and depart by helicopter.
One of three forts in the Solent, No Man's Fort was built in 1880, and was used in the First and Second World Wars. Along with the other two forts, it was operated and owned by the Ministry of Defence until its decommissioning in 1956, and sale in 1982.
The fort is also the seventh property to open as part of the Amazing Venues collection, which also includes Ackergill Tower in the Scottish Highlands, Chateau Rhianfa in North Wales, and Stanbrook Abbey in Malvern.