we rented a detached condo with back-loading garage for about a year. not really a big deal. no issues with garage being blocked ever. the neighborhood has a nice curb appeal with all the garages hidden. parking wasn’t really an issue either.
bottom line, if developers need to pack in homes into zero-lot-line mini-lots, this is a good way to do it.
we rented in another community of homes with zero-lot-line lots with similar sqft but with traditional garage and driveway. I think we actually had more problems with parking because when you pack homes in that closely in traditional front garage and driveway configuration, you end up with no street parking at all. you have a little get-together involving more than 2 guests and you are looking at a lot of folks trying to fight for driveway spots and limited designated parking areas scattered around.