Many of the apartments and condos that are built have quite a bit of greenspace in front of them - as an example take a look at Cook Street from Meares to Fairfield.
These buildings are already in place, but why cold there not be a requirement as more are built that these green spaces be managed as if they were public green spaces? There has to be a way to make them work as parks but not harm the privacy of the people living there.
Front lawns were created for exactly this purpose: to create the feeling of living in a park. Ironically, the end result has been "parks" more in keeping with beacon hill at is most restrictive than a true park.