There is a world shortage of houses and the Governments are doing their best to produce a maximum number of housing units with limited financial resources. To eliminate waste of materials and labor, Modular coordination is used in the design of new houses. All building components are placed at their respective positions without undergoing any changes at the site. The thickness of the smallest well is chosen as the basic module M and is taken as 4 ins. (10 cm.), and all measurements are multiples of this basic module. Chosen components of different sizes could be arranged to have a flexibility of 1M. The sizes of wall blocks are multiples of M, these sizes being reduced by 3/8 in. to allow for joints. Suitable sizes for horizontal and vertical courses are discussed. The dimensions of doors, windows, and lintels to coordinate with these courses are considered. Based on experiments elsewhere, ceiling heights are recommended. Standardizing of one dimension for all rooms and arrangement of slab components for flexibility of 1M above a critical number is considered. All internal dimensions of rooms between surfaces of plastered walls should be simple multiples of the basic module M. This principle should apply to measurements. in plan and elevation for bedrooms, living rooms, bathrooms, kitchen, corridors, etc, and thickness of walls. There would be no difficulty in planning all cupboards so that all external dimensions are modulated.