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.
On this site you can enter the information about your home and the addition and you will get an estimate on the added value the bathroom addition will give you. In 2009 the cost of adding a bathroom into an existing floor plan would normally cost between $3,000 and $6,000 for the average do-it-yourselfer. If you enlist the assistance of a professional they will make sure your space meets code and will add labor charges to your renovation bill.