The problem of people paving over their yards in central neighbourhoods into grey market parking lots is real, unsightly, and an environmental problem (runoff, and less of the shade and improved air quality that the already-limited vegetation would provide). Take a virtual stroll around Mechanicsville to see a few examples:
https://goo.gl/maps/g2cJiSmcPzD2
https://goo.gl/maps/rqT5DNmBndK2
https://goo.gl/maps/a5x6RxaCUZG2
https://goo.gl/maps/MqVfSGe4RF32
https://goo.gl/maps/VHchvhUjQnx
https://goo.gl/maps/4THkRZJa3Tp