I explicitly said “we should disincentivize (via fees or increased property tax) those who don’t properly renovate their buildings”, so… such people would just have to pay fees or more taxes (realistically and depending on fee/tax amount, they would take a loan instead or do the exact same thing they would have to do if renovations were needed for whatever other external reason such as aging of the building, fire, flood, etc.).
The problem is that a large portion of those people you talk about aren't renovating because they can't. Renovation already makes financial sense in many cases, but it requires a huge initial investment. You think for example an older retiree can just take out a loan? Haha, no. Fires, floods etc leave many people destitute unless they have a good insurance, which wouldn't apply to this situation.
You keep arguing against the proposal of incentives, which is fair enough. I can understand the argument that you don't want to finance people's private property. But what I take issue with is your idea of increasing the financial burden on those people with increased taxes and fines. I don't think you've presented a good argument as to how this would improve the situation in any way.
I see it (or at least some form of it) as a realistic possibility. Let's say that consciousness is a completely physical thing, a certain set of chemicals, cells and molecules in my brain that define what is "me". That would mean that given infinite time, something that possesses "my" consciousness would eventually appear again.