As per section 2(17) term business includes “provision by a club, association, society, or any such body (for a subscripttion or any other consideration) of the facilities or benefits to its members”.
From the above it is clear that GST is applicable on Co operative Housing Society.
And as per Notification 2/2018 CT (r) , collection of Maintenance charges upto 7500/- per member is exempted .
But many more activites such as service charge, Non-occupancy charges, Interest on delay payment, Sinking fund, Parking charges, Transfer fee is taxable , & if your aggregate turnover (Taxable +exempted) as per section 22 exceeds 20 lac you are liable to obtain registration under GST