Ouch. So if the middle house plot is so unfavorable (narrow and burdened with parking spaces), I consider it highly likely that its interested parties will want to build with a basement (simply because the footprint would painfully have to compensate for the basement replacement space).
On the one hand, theoretically: one would actually have to think that instead of groups of three, groups of two should have been planned. On the other hand, practically: this constellation is unfortunately the status quo of what the market demands: whether one theoretically would have to be a rubber man for the houses that result from it or not, people really want these plots that are as tiny as their budget :-(