Claiming dead space in a strata/condo lot

[Matt Belzile]

Hi everyone, 

This is a bit of a strange topic, I have never heard of anyone going through this and asking around I have been getting people not knowing what to think about it. 

Anyways, I recently bought a ground floor condo unit. I guess its considers a townhouse with a condo council. I was crawling in the crawl space when I was doing the plumbing for my bathroom reno. While I was down there, I found a room behind my unit... it's the width of my whole unit and there is about 10 ft before the ground starts to incline. like the building was built on a hill and they didn't excavate that area. this room is closed off to everyone, it's insulated, vapour barrier just no dry wall. 

Has anyone had a similar situation or is familiar with strata policies? Is there anyway I can legally claim this dead space? Any insight or suggestions would be greatly appreciated!

Thanks in advance

- Matt