On 7/11/2020 4:50 PM, F Russell wrote:
On Sun, 12 Jul 2020 06:19:20 +1000, Rod Speed wrote:


Depends on why it has subsided like that.


The house was built on this suburban lot about 60 years
ago.

The subsidence has been very slow. In fact it is a not an
uncommon occurrence. Concrete driveways sometimes subside
and there are companies that offer a "pump it up" solution
as a cheaper alternative to replacement.

I'm not concerned about sinkholes. I just want to know
if exposing 12-18" of the top basement wall poses any
problem.


If it is lower than surrounding soil and gets wet from rain it could
seep into your basement. It should be higher than surrounding soil.