So basically we'd be turning this:
Into this:
If you are turning the befores into the afters, the rent will be much, much higher than before the redevelopment. If the rents stay the same, they won't be fitting out flats to anything near that quality.
I lived in Maastricht, in the Netherlands, last year in an area of 2/3-storey terraced housing. They replaced a block of houses near me with a 3/4 storey apartment complex. Although I wasn't able to view the flats as I moved back to the UK before it was finished, you can see
here that the gain in space per unit and the uplift in quality over post-war social housing is not particularly big. The idea that you are going to convert 50s semis in depressed neighbourhoods into West London Townhouse architectural showing off while decreasing rents is fanciful.
I've thought that to prevent style guidelines just not being passed the American system of you can build anything if there aren't guidelines in place would work.
The American model is not a good model for functional towns.
The profit in the market would encourage nice housing (every developer seems to prefer to build "luxury homes" instead of basic ones as they get more profit).
They may market them as luxury but the nmajority of developments nowadays seem to be fairly nondescript 3- and 4-bedroom houses with tiny gardens.
It might be a good way to bypass NIMBY's while letting them feel like they are getting a say.
NIMBY's don't want a say, they want nothing to be built near them. So this doesn't bypass NIMBYs at all but rather goes head-to-head with them.