It's key to have a knowledgeable agent present when shopping for new construction, and is here to help you navigate through your options in the Pittsburgh area.
Buyers of new construction in a neighborhood don't like to see houses sold after theirs go for less money. Knowing this, the builder or developer often won't bend on price. (You'll appreciate this behavior after you've bought a home in a development of new construction!) Regardless, depending on the market and the status of the project, there's sometimes room for negotiation.
For example, if it's a recently completed home, you have little to no negotiating powers. But if the home has been sitting fully furnished, like a show or model home, and there haven't been many offers - then the builder might be willing to work with you. The longer the home has been on the market, the more the builder has invested.
In cases where a builder won't budge, ask for assistance in other areas. Ask for them to pay a share of the closing costs, or extra amenities, like appliance upgrades, a garage door opener, a fence or landscaping, or an extended home warranty. Or take the contrary route. If a home is nearing completion, you can often save money by passing on suggested upgrades from the builder and installing things yourself.
While you should always negotiate a home warranty so problems can be fixed, it's also imperative you get a home inspection before closing. Inevitable problems can be repaired (by the builder) before you move in and larger issues identified before it's too late. Since an inspection is relatively inexpensive, some new home buyers get an inspection after being in the home for 10 or 11 months - that way, the builder can make the repairs before a 1 year warranty expires.