It depends on your requirement like 2 or 3 bhk.
All the rooms arrangement should be made as per vaasthu. The main door entrance should be in positive zone.
Before that you should check the ground energy of plot whether positive or negative. If any defects in the ground energy you have. To do rectification befire construction. If everything is fine, every one will happy.
Vaasthu & cosmic divine enerenetrgy consultant