I would say it is a very good idea to have a professional representing your interest newly built or previously occupied to navagiate the process.
I working a buyer now who is buying new construction. I advised her to conduct a home inspection even on new construction because it is important to have a 3rd party expertise representing your interest which they had not consider. the inspection brought to light things that we got addressed.
There are many other reasons as well. if you are looking for some assistance feel free to contact me or visit the link below for information you can search at your own discretion.
Century 21 New Millennium
The other important issue in the builder contract. You will need a profesiional to read and consult with you on the contract you are signing. Remember this, the builders sales person is working for the builder, not you.
The builder will "Pay" your real estate agent and in NO way does your agents compensation effect your sales price.
I could add many more issues to be aware of but I have only so much space. You can contact me if you need more information.
RE/MAX Realty Group