I am familar with this area and would not be concerned of it not being "built out". There is demand in this part of town and Snellville has seen very little new construction compared to it's neighboring towns of Loganville and Grayson.
I must suggest since you are looking at new construction to be sure to work with a Realtor to represent your best interest. The agent will also be able to give you some more detailed information about the statistics of new homes in that area and how they are selling.
Best of Luck to You!
New construction properties are not generally listed in FMLS. As the others mentioned, they will list one or two as "examples," but then have others on hand. Since they are not listed, they will not show up as pending or sold in FMLS.
Buying new construction is a bit of different ball game. The onsite agents are very nice and seem to give you "fact like," information, but ultimately they are representing the builder. From your description, it sounds like building hasn't begun yet. Yet another "buyer beware."
Also, you may want to find out if they are building different phases. While it CAN be cheaper to buy a lot pre-sale, you might want to wait until some are built and buy pre-sale in the second phase if that's a possibility.
A new home purchase can be a complex transaction and you would be well advised to use a buyer's agent to help you navigate the process. You should absolutely have an inspection done once the property is complete - AND leave yourself a window in the contract to negotiate any repairs. Check on what warranties are offered, if they are transferrable if you sell, etc. etc. - too many other things to mention.
Another thing to be cautious with is using their financing - while they can offer you great rates, be sure that they are truly comparable to a third-party, reputable lender. They will offer you all kinds of incentives for using their financing - paying closing costs, free upgrades to name a few.
While you could certainly lose money by buying in a neighborhood before it's built, you are more likely to lose money - or be put in a bad place - by just signing on the dotted line with the builder's agent.
I know this sounds like a self-serving answer, but it makes sense to have someone representing you and the builder ends up paying your agent's fee.
Best of luck to you!
I live in the area and would be happy to assist you with your purchase. Feel free to contact me anytime.
The concerns that you mention are legitimate concerns in this market.