Priory Lodge features on several Liverpool heritage websites.
Due to the building’s listed status, the owners must now re-use every brick in the repair work.
The destruction of a supporting strut below the bathroom meant fire crews had to insert a steel piece of scaffold when the wrecked Volvo was removed.
Officers said the room above the damaged porch had shifted slightly and will now require work to set right.
Police are scouring the car for evidence to identify the thieves.
Both the airbags had deployed in the crashed car.
Investigating officers are urging anyone with any information to contact Admiral Street CID on 0151 777 5394 or Crimestoppers on 0800 555 111.
Officers are particularly keen to speak to anyone who may have seen a dark-coloured Audi in the area around the time of the incident.
