

False Ceiling:
It either be of gypsum. We can have a recessed ceiling as per ur suggestions but the ht. will come down n if u have multiple lights from a single switch ( like in the pic) we may have to rework on the wiring a little.
It can be of any desired colour.
However pl note tht it will be difficult to change the fan point.
Le me know which areas u plan for false ceiling. If u need multiple light points on ur ceilings then u will have to go for false ceiling in those areas.
It also helps in reducing the load on the a/c as the ht. is cut down.This works out to be about 50/- to 75/- per sq.ft.
Flooring:
As suggested the flooring in the common areas can be of wooden laminate or wood which would differ hugely in their prices.
We can work out a pattern as reqd.
Wooden laminate 12mm to 15mm thk. - 100/- to 300/- sq.ft (depending on the selection- teak, oak, pine, rosewood, etc.)
Wooden flooring 12mm to 18mm thk - Teak n rosewood in the range of 600/- n odd
others between 400/- to 500/-