GST

For constructing own house in own land with an Engineer Cum builder and architect as per bill of quantities, any GST payable. How to avoid paying GST. If I get the purchase bills of all construction materials in my name, can I avoid GST? Even in that scenario, whether I have to pay some GST for the services of the builder. If so how much. Generally how to avoid GST by an individual for constructing his own house with the help of an Engineer/Builder.