Legalization debate

I’m wondering if anyone here has dealt with something similar regarding property legalization;
Some relatives of mine have a building that isn't fully permitted. It was originally built as an outbuilding on the lot, rather than being registered as residential space.
At some point down the road, they added onto it—installing stairs and a deck—but those changes were never officially recorded.
(Everything was constructed prior to 2012).
Now, they’re trying to get everything legalized, but there's a catch...
They brought in a surveyor, and while he measured the new property lines, he somehow claims he doesn't know the actual square footage (neither of the footprint nor anything else)? 🤔
To make matters worse, the architect is demanding an email directly from the surveyor containing the digital project files, refusing to accept scanned documents instead.
Honestly, the whole thing feels like something straight out of Spider-Man...
Is all of this actually necessary for the legalization process?

If you want everything to be strictly above board and fully compliant, you’re going to need to go through the official legalization process.

Depending on what you're looking at, the requirements change. If you've made structural changes to the building's footprint, you'll need to bring in a surveyor. However, if the modifications are internal—dealing with specific unit layouts or floor plans—you'll need an architect instead. Feel free to shoot me a direct message if you'd like a comprehensive quote to handle the whole headache from start to finish.

geotehnika.com