UK Greens aren't NIMBYs. They're against doing more of what's being done across UK cities already - which is building generic boxy blocks of cheap housing that look like they fell out of Minecraft, and selling them for unreasonable prices.

Many of the flats end up in the hands of landlords, who charge even more unreasonable rents.

There is no sense in which that's a workable long-term solution to the housing problem.

The Green pitch is "That's clearly not working, let's not do more of it." Which has nothing in common with "We don't want anyone to build anything anywhere."