The settlement of Mohenjodaro shows clear signs of planning. It was divided into two sections – a smaller but higher Citadel and a larger but lower Lower Town. Roads and streets were laid out along an approximate grid pattern, intersecting at right angles.

The drainage system was carefully planned, with streets having drains laid out first, followed by houses built along them. Every house needed at least one wall along a street for wastewater to flow into street drains.

Bricks were standardised with a fixed ratio where length was four times and breadth twice the height. Buildings were constructed on platforms as foundations, and once built, all construction was restricted to a fixed area, showing the settlement was first planned and then implemented accordingly.