Contracts made by the Company prior to incorporation of the Company, may also needs to be looked from the perspective of section 15(h) and 19(e) of the specific Relief Act, 1963. As per these sections, specific performance may be enforced against the company where the promoters, have before its incorporation entered int a contract for the purposes of the company and such terms and conditiosn are warranted by the terms of incorporation i.e. by inclusion in the Articles of association of the Company. Please also see the commentary of SEction 46 in Companies Act By Ramaiya..
So all pre-incorporation contracts per se may not be void ab initio under the specific relief act. however but since registration of immovable property needs to under the Transfer of property ACt, the relevent provisions may need to be confirmed therefrom.