You really would have to speak to the township to get an idea of costs. In some towns the cost varies by the size of the project.
If you use a contractor, they usually apply for and obtain permits for you, which will also guarantee that all the work (demolition and eventual building back) is done to code. Don't forget there will be inspections to make sure the demo is done safely, as well as inspections once the new framing, plumbing, electric etc are installed. The contractor obviously will also give you a price for the entire project including the cost of demolition and carting away of debris.... more