Some new techniques for economy and speed of building construction which has been evolved through research and case studies are presented. Under-reamed pile foundations and Hyperbolic Paraboloid Shell foundations for black cotton and expansive soils of low bearing capacity have been recommended. Circular reinforced concrete column footings designed on the basis of the theory of plates are preferred to square or rectangular ones. Brick cavity walls constructed with two leaves of brick on edge jointed together with ties at intervals, soil-cement blocks in place of bricks are recommended for low-cost wall construction. Use of composite cement- lime mortars, and replacement of cement with fly ash to the extent of 20% are also found to assist in the economy.