Applicability of service tax and vat

Can Anyone help me out for the issue - Builder has constructed a building and has got OC and CC. Out of 49 flats, 2 flats are unsold. Now If we buy one flat directly from a builder, will there be any service tax and or Maharashtra VAT applicable on the transaction? I was given an understanding that as per provisions of both Maharashtra VAT and Service Tax, neither Maharashtra VAT nor Service Tax will levied by the Builder since it is now fully constructed flat (OC and CC received as aforesaid) If either or both of Maharashtra VAT and Service Tax is to be levied, will it on full agreement value or any abatement is available? PLEASE HELP