Recycled Home
Use the material from the demolitions/Constructions (who usually pay money to clean up) the material could be dirt, cement, Iron House Hardware.

Solution

We need few industries to build the building material such as brick, iron and hardware by recycling the dirt, hardware and iron collected from the demolitions/constructions. Usually this works out very well in Cities where builders either spend lot of money or leave it on roadside causing more problems.

This would reduce the cost of material a lot. build blocks in rural areas where labor is cheaper, this would also generate the employment opportunities in villages that depend on seasonal crops.