If you have managed to get the building part down and simply need the actual placement, look up grid placement on google and there is a devforum page that shows you how to automatically have your block adhere to its new surface and place blocks on top and around each other.
#Block placement system
cyan plover
@tender flume
Should be a video included as well.
I know because I am currently working on a block placement system for a project of mine and found the line I was missing in my code that allowed it to function.
cyan plover
@tender flume Are you using a module script to store the part info ?
tender flume
<@456226577798135808> Are you using a module script to store the part info ?
No, also thanks for trying to help.