It's 100%, and more. All of those are input costs for the home, so they have to be passed on. The reason I say “and more” is that those costs are financed. If you're paying hundreds of thousands of dollars on development fees early on in the process, you're financing that cost over years, so you have to pass the interest charges on to the client; otherwise, you're going to go out of business.
So yes, all the taxes, all the fees and all the delays unfortunately end up in the price of a home. They have to.