We built with Raven Homes about 2 years ago. Built on our own lot and with a completely custom floor plan. (Designed it ourselves, but it's fairly simple layout) Our cost was about $180/sq ft.
My best advice is to have a layout in mind, or even a floor plan with measurements. Have a good idea of your wanted finish outs and up grades. Then take that list to at least 3 builders for a quote. The more details you have up front the better to "apples to apples" quotes.
Second advice is to tour the houses of your possible builders in various phases of construction. You can see how they frame out, how they insulate, how their subs work, how clean they keep their job sites. Job sites can say a lot about the builder and their oversight and attention to details.