假如产权证已经办好，再补房屋共有权证很麻烦，因为增加共有人法律规定只有通过买卖或者赠予的方式。
If property right evidence has done , fill again the building is mutual authority card is very troublesome , because add mutual person law , the regulation adopts the way that buying and selling perhaps gives only .
房屋共有权证