I would like to know on what basis the flat maintenance charges could be raised from the present amount? Our building is over six years old and has 65 flats. We recently completed painting the outside walls for which the corpus fund was used.  Being six years old, the water pumping motors for all the five blocks need replacement and also expenses are there for the OTA space closing, hard topping in the two wheeler parking area. Please advice.

The maintenance charges have to be arrived at on the basis of the actual expenses that are being incurred on a monthly basis. If the charges are being increased, there must be justifiable reason.  For the nature of work mentioned by you, there can be a one-time contribution which can be collected from the members.