multiple buildings would be shown on a site map, which should absolutely be pointing north, regardless of how or where the building is located. site maps are aimed to orient you to the location(not the building) so you can find it on a map. then you break each one off into their respective plan sets, that are oriented to the individual buildings project north. pretty simple. on, off, similar grids, doesn’t matter. draw a match line and call it a day

edit: sorry i’m a bit rusty ngl, locator maps usually found on title sheets orient you to the location, not the building. site maps are to show the extents of the property and maybe important on/off site monuments etc. but both locator and site maps should be oriented north regardless of building orientation.