The trick would be to apply the improvements to every poor neighborhood at the same time so you don't create winners and losers and upset the balance in the housing market, but this is basically impossible.
The trick would be to apply the improvements to every poor neighborhood at the same time so you don't create winners and losers and upset the balance in the housing market, but this is basically impossible.
Typically with gentrification it isn't a series of small improvements that change the neighborhood its bigger urban planning changes or additional big projects.
Even if you could do that, it wouldn't work. It would simply make all of the poor neighborhoods more attractive to gentrifiers at the same time.
I think there is a tipping point where if you help poor neighborhoods too much, they become attractive enough as places to live that the poor residents end up being displaced by increased housing costs. It's an unintended consequence.
So if you increase the quality of all of the affordable housing, then it shouldn't make much impact on the prices of those houses. They're already paying what they can. Now if you create new job opportunities at the same time then the equation changes. If the high quality jobs greatly outgrow the housing then you end up in a situation like San Fransisco or lower Manhattan where rents skyrocket regardless of the condition of the housing.
The difference I see here is that the developers and new residents are the ones who reap the benefits of the increased property values from gentrification, whereas if the city makes modest improvements before it's current residents are forced out by increasing prices/taxes, then the current residents reap the increased value. Even if they move because they don't want to pay taxes on higher property values, their property is still worth more when they sell it.
No, the current homeowners reap that value. Many residents are renters, particularly in low-income areas, while the owner often doesn't live anywhere near the place.