Rebuild burnt down house with foundation or without?

[Kenny Ness]

Hello fellow BP users I could use some advice for a friend. My friends house burned down and insurance has deemed it not repairable. The insurance will pay them out for the value of the house itself and they need to sell the lot after paying to have rubble removed. My question is should they also have the foundation removed so who ever buys the lot can rebuild whatever size foundation they want or do they leave it intact because it would save the builder some money increasing value of the lot.