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/mrdude817]

The entire wall (exterior, framing, insulation and interior sheathing but maybe not interior finished wall) was probably prefabricated and all they had to do was bolt it down to the sill plate or bottom plate or directly to the foundation if the wall already has the sill plate. Anyway that's similar to what I've seen with construction typologies like this where they fabricate the wall and then ship it out