Is it reasonable to pay the property fee after five years of water leakage in the basement?

Reasonable. If the basement leaks, the property can be reported to the housing maintenance fund for maintenance. If it is still within the warranty period, the construction unit will repair it. Not paying the property fee during the five-year waterproof maintenance period is not the solution. If the property does not act, you can expel the property through the owners' committee or bring a lawsuit directly to the court, provided that the property fee is paid on time.