It is important to confirm which state you are in. Who is responsible for what varies with different state legislation. In the ACT, what you describes would probably be ‘class B’ (but confirm that) and you would be responsible for repair and maintenance of your townhouse unit. However, it is possible for the OC to resolve to make the OC responsible for specified maintenance that would usually be yours to deal with. Possibly similar elsewhere. I would get that verbal agreement formalised by a proper resolution, if that is consistent with your state’s legislation.