There's a large gradient between "custom" and custom. Modifying an already designed home is so much cheaper than something from the ground up. As in, thousand

There's a large gradient between "custom" and custom. Modifying an already designed home is so much cheaper than something from the ground up. As in, thousands vs tens of thousands. Depending on where you live and what you're building, that's a decent % of the total cost of a house.