Here's a new concept in real estate: Buy a house, and when you go to sell it years later, owe the original developer or builder 1 percent of the sales price. Freehold Capital Partners, a company started in Texas, is selling developers across the country on a plan that would attach a private transfer fee to homes, allowing developers to profit for generations. The fee, written into neighborhood restrictions, would encumber the property for 99 years and throw 1 percent of the sale price back to the developer — or his or her estate or another investor — and Freehold...