There is a great resource that we point our clients to when trying to determine "how much things cost" in general. There are so many different variables that go in to a project that it is hard to really throw out a figure and say "Hey, a bathroom remodel is going to cost XXXX" without knowing the location of the project, how big the bathroom is, what level of finish, etc.....
Remodeling Magazine does a survey every year of 35 common remodeling projects, and what they actually cost across the nation. They publish these results, and categorize them by location. Their survey is really great because they actually give you an example of a project, and a laundry list of what goes in to it, and a typical price that would be associated with that remodeling project. We find that it is a really great resource for trying to determine ballpark figures and get a good idea of what things cost around you.
Here is the link to the 2014 report: http://www.remodeling.hw.net/cost-vs-value/2014/