Because of cohesion and transpiration, water is able to move against the flow of gravity in plants. The attraction of water to other water molecules, or cohesion, allows water to pull other water molecules up through the xylem.
Room addition cost about $210 per sq.foot and if there is a bathroom in addition you should add $5,000 in average and if there is a kitchen in addition you should add $10,000 in average to total price of $210 per sq.foot x sq. footage.
Generally, my personal experience in New Jersey is that to add a Cape Cod (dormer addition with 2 bedrooms (about 11' x 16' and 14' x 14') and an 8' x 10' tile bathroom with shower over tub to a Cape Cod house costs at least $80,000, or about $175 per square foot.