I have lived in council properties in the past and was always of the opinion that any outside paving and concrete was their responsibility to repair. In my last home they came and replaced the garden path as the slabs were cracked and lifted, I was not billed for it. They did try to bill me for a fence that had been vandalised but said if I were to report the vandalism to the police and provide the council with the crime number they would then repair it for free, which is what I did.