Google recently added the ability to add your own photos to Building Maker, but now you can also use imagery directly from Street View on Google Maps! "Start modeling your building using the aerial imagery. After you've constrained a block in at least two aerial images, you'll be able to "Add Street View Images" from a drop down menu on the left-hand side. Capture a few images from Street View and continue modeling as normal," explains Google.
The following video illustrates an example of using this new feature:
Also added 6 new cities to Building Maker: Edinburgh, United Kingdom, Florence, Italy, Vienna, Austria, Pittsburgh, PA, United States, Santa Cruz, CA, US, Riverside, CA, US.