Allow Fully Editing Sims

  1. press the key-combo Shift+Ctrl+C to bring up the console,
  2. type testingcheats on and press Enter,
  3. type cas.fulleditmode on.
  4. Shift-click on a sim and select Modify in CAS.

Move House

  1. Save the house to My Library by accessing the build mode,
  2. Make sure all items are stored to inventory,
  3. Go to Manage World from the options and pick the bigger lot,
  4. Click the build tool and select the previously saved house and place it,
  5. Go to Manage World and replace the old house,
  6. Move to the new lot.