I am constructing a home and the area size is 28 X 21. It has 9 Pillars each has

Thanks for your quick reply. It is a duplex home constructed by my family. Living room has been extended. Now G Floor is in finishing stage. Looking for the strength of the building to construct more floors.

Further to remove center column in ground floor or first floor its depend on foundation and slab design details.

Better contact local civil engineer and don't take risk.

My Brother is constructing a building G+ 1 Duplex home which is almost in Finishing stage. Columns  are 12 X 9 with 6 12mm rods. Center one highlighted in Yellow has been made dummy due to the change in Plan and Beam with 16 mm rod has been Provided from the structural beam(Highlighted in Yellow). All the walls are built in the same structure in First Floor. One of his friend recently visited the place and told building strength will be a question since there is no Center Column. He is very much worried now. Could you please help. what corrective action can be take now?

if you remove column after costing the slab it is dangerous and you need to place support by ISMB frame section as per design.