Size of room is 12*8*8sq.ft and I have to paint four walls and a roof of the room.what should be the actual cost for painting the room.

The cost of doing a job has many variables.

Is there any patching that has to be done?

Are the walls and ceiling going to be primed before finish coat of paint?

How many finish coats will be put on?

Is the trim being painted?

Also the area u are in has to do with the price.

If u are looking for a cost for a contractor to do the work, get 3 estimates and go from there.

Chuck