I'll echo what has been said already. Use a buyer agent who is familiar with new construction, and be sure to have a home inspection. The buyer agent shouldn't cost you anything as most builders expect to pay a commission anyway.
There are good and bad builders. Just because something is new, doesn't mean that corners weren't cut to save money. The city building inspector's only job is to make sure everything was done to code, not that you are getting what you're paying for, eg. Are the walls plastered or skimmed and sanded? What grade of floors were used, and how many finish coats were applied? If in a damp neighborhood, or if there is a finished basement, was a french drain and sump pump installed?
Your new agent can also recommend a real estate attorney. In buying new construction, an attorney is of utmost importance. You'll need to have an airtight purchase and sale agreement with a thorough punch list of items to be completed prior to closing.
It is tempting to try to save money by dealing directly with the builder, but it could end up costing you more in the long run. Good luck!
1). Buy directly from the builder without your own buyer's representation. The builder loves it, of course. Saves him/her loads of money. But you have no one representing you. Protect yourself....work with a buyer's agent. It costs you nothing.
2). Not hiring your own home inspector. Do not rely on the builder and the building inspector to ensure everything is done correctly. Hire your own home inspector and have him/her in the process all along the way. It will be the best investment of a few hundred dollars.
3). Obtain financing through the builder. Most builders want to control the financing process (hey, I get that!); however, often there is borderline coercion used and the builder "requires" borrowers to work with the in house lender. That, in fact, is a violation of RESPA and is illegal. No one can force a borrower to obtain financing from a particular source. Yes, the builder may offer "spiffs" or upgrades for working with their lender; however, often the rates are higher and the closing costs are dramatically higher. Compare the builders closing costs with another lender you respect. Weigh it out. Given the state of the new construction industry, I don't think a builder would risk a buyer walking away over working with you chosen lender.
Best of luck to you! If you are in need of a closing attorney, I have a great contract in Boston. Just contact me via my profile and I will give you contact info.
Ellen G. Friedman, Keller Williams Realty, 617-448-1542 or firstname.lastname@example.org