Please be aware that the size of the apartment is basis for calculation of the maintenance because the common area is proportionally divided into each and every apartment in the township it is immaterial that any Apartment holder is paying 50% of the maintenance he has to pay hundred percent of the maintenance based on the square feet area of the flats size of the flat definitely matters and the apartment holder will have to pay according to the size of their apartment this method is known as absorption costing to observe all the expenses of the Township based on the square feet area of the flat in case there is no law in disregard you have to approach to Registrar of societies and chits and register your complaint in this regard to get the direction for Resident welfare Association