There are a number of articles on this web site on ST on a Housing society. 2 high courts + Tribunal have held that there is no liability due to the members and the association/ socienty being the same- principle of mutuality as in income tax. Therefore no service inthe absence of service provider + receiver. One cannot provide service to self.
Secondly the socienty only acts as conduti to collect monies for services provided by 3 rd parties. It is merely getting amounts paid reimbursed. Delhi High Court has hedl that reimbusements cannot be said tobe part of service. Not liable.
Socienty may take proper legal opinion from local expert in Service Tax and go forward.