Dispute about common space of a housing society

AS OUR HOUSING SOCIETY IS DIVIDED INTO TWO GROUPS. FRONT SIDE BIGGER FLATS & REAR SIDE OF THE BUILDING SMALLER FLATS.THERE IS APPOX. 02 MTR GAP BETWEEN THE BUILDING AND THE FENCING WALL. NOW AS THE FRONT SIDE FLATS ARE ABOUT 1400sqft , THE COMMON AREA OF THE FRONT SIDE IS MORE & THAT AREA OF REVERSE SIDE FLATS ARE LESS I IN MEASUREMENT.NOW THE REVERSE SIDE PEOPLE ARE ENJOYING THE FRONT SIDE COMMON AREA FOR PARKING,EVENING GATHERING ETC. BUT WHEN REPAIR JOB COMES FOR FRONT SIDE ,THEY DONT WANT TO PAY FOR THAT. PLEASE ADVISE . WISHES FOR FOURTHCOMING DURGAPUJA TO EVERYONE.THANKS.