I'm not sure if you mean remodeling an existing bathroom to make it new again or to add an additional bathroom onto your home?
If you're remodeling the current bathroom to make it into a new bathroom then it will help the house sell much easier and quicker and for a better price.
Remodeling a bathroom could increase your homes value by $5,000.00 or more depending how you made the bathroom look.
Adding on an additional bathroom can cost as high as $25,000.00 and could raise the value of the home by $30,000.00 to $40,000.000 depending on where your home is located and what the price range of houses go for in your area.