A buyer is questioning whether a 5% GST is applicable on the sale of a finished house priced at 32 lacs, as it wasn't explicitly mentioned in the sale deed. The builder claims GST is due until the occupancy certificate is issued and property tax is paid. Advice suggests consulting a local chartered accountant or tax lawyer, as GST rules for affordable and non-affordable housing differ, and the builder's costs (like land purchase and construction) may influence the tax liability.