Let's say a house is actively burning down next door. If you were to sell right at that moment, the value of that home would be decreased due to the fire risk.

Let's say a house is actively burning down next door. If you were to sell right at that moment, the value of that home would be decreased due to the fire risk. However, there isn't any sensible methodology for predicting the exact amount that house would decrease in value. The point I'm making there is that for some changes, price will most definitely be affected negatively. However, it would also be impossible to quantify how much the price would decrease with any degree of accuracy. Now, is something like "door color" going to have this clear of a negative impact? No. We should ignore those requests as largely absurd. But there are definitely activities that would have clear negative impacts on price, even if that can't be quantified in an accurate manner whatsoever. Does this mean we should legislate changes to help maintain property values? No. But it's certainly a valid claim in some circumstances.