A failing roof at Mansfield’s Rebecca Adlington Leisure Centre needs to be replaced after seven years of issues.
Mansfield District Council says it has attempted to fix repeated problems with leaks to the roof without success.
Problems have led to water getting into the building and damage has been found inside.
In some areas, the popular leisure centre needs a wholesale replacement including boarding and insulation.
The roof membrane also requires replacement in other areas due to water damage.
The roof had been due for replacement in 2029 but the authority says it needs to bring the plans forward.
Now it plans to go out to tender and find a contractor for the works.
Delegated decision papers reveal the works will cover more than half of the total roof area.
Works involved in the contract will also include replacements to air handling and conditioning units for the changing room and the gym.
Overall, the project is expected to cost the council £550,000, including £95,000 for the air conditioning units and up to £425,000 for the roof.
A further £30,000 will be needed to design the project, which will go out to tender for a contractor by the end of the month.
In a report, Marie Clay, the council’s leisure and community wellbeing manager, said: “The current roof was installed in 2009 and has been failing in a number of areas over the last seven years.
“Repairs to the existing roof membrane over this time have failed to resolve the roof leaks in a number of areas.
“Water ingress and damage are evident inside the building.
“The roof, in a number of areas, requires wholesale replacement, including boarding and insulation, and in other areas the membrane requires replacement.
“The air handling plant (both the changing rooms and gym plant) were due to be replaced [in 2029].
“The best approach is to pull both the roof and AHU replacement schemes forward to take place together in 2023/24.”
The authority adds it does not have the “electrical and mechanical expertise in-house” to conduct the work.
The building is owned by the Labour-run council and it is responsible for its maintenance.
Through finding a contractor for the work, the authority adds it hopes to reduce the carbon footprint, energy and operational costs of the centre.
The tender process to find a contractor is due to be approved by David Evans, head of health and communities, during a delegated decision on March 29.