Ask your architect to plan your interiors well in advance:

The positions of switchboards and plug points. this will depend on where you place your kitchen mixer, tv, audio system, fridge, washing machine, computer or other such equipment

The positions of almirahs and other large furniture with regard to doors/windows ,built-in cupboards and storage areas

Correct sloping for the bathroom and kitchen floor should be provided to allow efficient drainage

Correct sloping should also be provided for the roof surface to allow efficient drainage of rainwater (stagnantwater can create seepage problems later on).
The joint of the rain water pipe at the roof slab should be effectively sealed so that seepage problems do not occur in the future

Ensure concealed electrical conduits are placed prior to concreting/plastering Stair roof doors should always open outside so that the rain water does not enter the house

Individual shuttering planks should have a smooth, flat surface. the planks when placed together should give a uniform, levelled surface. this way the concrete surface will also be even, thereby saving money on plaster work

Chhajjas should have a slight protrusion (drip course) at the edges so that rainwater does not drain inside and spoil the paint

The underground water tank should be placed at a level so that in case of waterlogging, murky water does not enter it

Sanitary/sewerage lines should all be placed on one side of the building

Walls of underground water tanks/septic tanks should be made of concrete and not brickwork. this will make them more durable.