I may be wrong at this, but don't get twisted. Zoning is INDEED the first move to development. Designate certain site as "high-residential zone" and it will be done. Ditto for low-rise commercial, light industrial district, and so on... But that is a low-value development since it began. (Don Mills, Jane any1?) It does not guarantee that once zoned, it will instantly be a highly desired development zone. Good access to public transportation, key locations to landmark (park, schools - regardless of good or bad, historic relevance), access to shopping districts will appreciate the value of the properties.
Mature trees, "good schools" and "a little garden with pretty little f*#Y$ng animals" are small boon, yet not an essential key to convince the developers to invest the area. They are side benefits, and they are followed by existing establishments (shopping areas, parks, schools, rapid transit.) North American cities are intensifying through reliance on rapid transit, which is followed by pedestrian-friendly properties, street-retails and higher-density buildings. Transit City is planned to revitalize much of the impoverished T.O. neighbourhoods that previously missed the opportunity of good access to rapid transit.
Rapid transit is a vehicle to intensification, higher-valued properties and improvement of the auras in any neighbourhood.