Work to demolish Fort Regent's swimming pool will start at the end of July, Jersey's government has announced.
The work is expected to cost £2,697,000.
The island's Minister for Infrastructure, Deputy Kevin Lewis, has approved the demolition of the pool.
Strong winds have blown off several sections of the roof and outer cladding, sparking safety concerns.
There have also been reports of break-ins, vandalism and trespass on the building's roof.
The decision to demolish the swimming pool was made after concerns over the safety of the derelict structures.
There is asbestos in the building, which will need to be removed and disposed of by specialist contractors, before the building is demolished.