As already mentioned, ask a structural engineer if it is possible to build on the house and if yes, how. Stilts are not a good idea. Do you have plans of the house?
As already written, ask a structural engineer if you can build on the house and if yes, how. Stilts are not a good idea. Do you have plans of the house?
All static calculations and plans are available. I am contacting a carpenter who works together with a structural engineer. Thank you for the help.