its a 3 family condo condo #2 added a room does he have it to change the condo booklet for the room ? does the common area share have to change b

if a room was added on a 3 family condo condo #2 added a room 12 by 12 feet does the share of the common area changing ? because now he have a bigger area .do i have to put in the condo booklet to revise the share of the common area? because the taxes did increase on the extra room so does the expenses of the common area have to be adjusted now because condo #2 have now a bigger apartment more sq foot then before