As the other agents mentioned, your agent should be able to assist you in determining if the house is priced where it should be. New construction is definitely going to command a premium price versus existing homes.
When I searched for that zip code, I didn't find much in the way of new construction. The home you have interest in is the only new construction for sale. There has only been one other new construction sold in that zip this year, and it was at $1.66 less per square foot. That would put your home at $197,183. The other homes you are seeing are at least 5 or 6 years old, which will tend to lower their prices some.
If you really think you will be in the home long term, then the new construction might be a good option. If you think you will be moving out of it in the next 5 years, you may want to consider other homes, as the new construction is not going to hold it's value as well in the short term.
Good luck in your search!