Live With It
Interior Flooring Adjustments
Use leveling compounds and/or subflooring adjustments
Lift Wood Structure
Disconnect, lift, shim and reattach the wood framing. Either perimeter or individual interior footers
Underpin and Lift Perimeter
Deep elements that tap into stronger soil or rock below and use hydraulics to life the foundation and house up (cost depends on area but average home in $30k-$80k range)
Underpin Interior Footers and Lift Interior
Deep elements that tap into stronger soil or rock below and use hydraulics to lift the foundation and house up
Demo and Rebuild
Starting over will leave you with a level foundation