[jeffbee]

20% IZ is usually a show-stopper when combined with height and FAR limits but the idea is that there must be some point in the solution space that works with 20% IZ.

San Francisco has IZ set at between 20 and 33% depending on the project and this is widely seen as a blanket anti-development policy.

[celestialcheese]

20% was a showstopper when cities could drag things out for 10 years with red-tape and consultant hell.

Now it could be doable with a lot of that red tape is gone.