Homestead says my property might be eligible. In fact, my lot is small and there is no more room to build. Plus the HOA would never allow it.
For space—you'd be surprised what we can fit, but there are certain lots where it will be impossible without demolishing and re-building a smaller home. We don't currently do that, so in that case, you are out of luck for now, but you can go it alone. We do love fighting with HOAs!