Modify door to master bath in 1rm condos, possible?

Hi renotalk, 

I plan to buy a single room condos for my own use. Some of them have bath room only accessible from master room, for example the floor plan I attached. 

I ask whether it's possible to modify it such that friends can access the bath room without open the Master bed room? Will the condo allow it, and the cost of such work? 

Thank you.