After that excavation or digging work starts to the required depth as recommended by the architect then followed by foundation concrete which receives the entire load of the building and transmits it to the natural foundation below it.
Then followed by laying of footing work which must not be below 150mm above ground level. Filling work and casting of oversite concrete also follow.
The next step is the laying of the super structure to Lintel level then concrete is cast across all openings in the wall after which three or more courses of block work is laid on top of the Lintel concrete then roofing takes over.
When roofing is done, internal and external finishes such plastering, rendering , cladding, floor screen, tilling work etc are done then painting is final done to accommodate persons in.