10 ways to Sunday! Building new homes is a very competitive market. Builders are always offering an incentive to buy their homes. Typically, the incentive is greater to buy an inventory home - one that's already built or at least started as they've selected the lot, the elevation, floorplan, upgrades, etc. - than a build to suit. However, builders have incentives on build to suits as well. They typically range from xx amount off the home to certain upgrades going in the home.
You almost always will get a discount for using their mortgage company and some will match the deal of another outside mortgage company or still allow you to get the discount if using an outside mortgage company if they can't match. That's not the norm, but some will.
There are also ways that they can buy you out of your lease and other things. If you are a non-contingent sale, you are coming from a stronger position. Anyway, everything is negotiable if you know how to structure it in your best interest.