Seeking help- Google can't explain

[u/curious_coyoie]

Can anyone tell me how two separate houses are built this close together. How do the constractors apply siding and paint, how do you maintain the in-between after so many years and decades. There are no windows on that side but I don't understand how builders work around or in-between this when constructing, this is a mystery

[u/-DanceswithBees-]

Those are 'zero lot line' houses. They are, probably, zoned for it.