And here's a New Urbanist example. There are some efforts to create small backyard spaces behind detached houses and rowhouses, but overall the vast majority of the land behind homes is occupied by garages and pavement (this is
Here is Kentlands, showing considerably more attention to backyard spaces (thanks for catching my mistake, Laurence):
This is a New Urbanist-inspired development not far from Kentlands, showing clearly the presence of a decorative fringe of front and side yards, with rear spaces reserved almost exclusively for vehicle access. The ratio of pavement to inhabitable built footprint appears to exceed 1:1.
Not only suburban greenfield development but also urban infill follows this format. This is a block of new townhouses in southeast Washington DC, built in a traditional architectural style. The planner has provided a small common area within the block, but again there is no private outdoor space except for a few rooftop patios.
By contrast, here are a couple blocks in the Capitol Hill neighborhood, just north of the infill townhouses in the previous image, featuring both fronting streets, backyards and alleys:
If anyone is aware of better examples of street-and-alley neighborhoods in modern developments, please let me know!