In general more open area like balcony should be on North or East.
Don't confuse that because of balcony only on south to west it is bad vaasthu. Of corse the bcony should not come on the above mentioed. Due to that you will have energy inbalance.
Solution without demolishing it can be done to nullify the defect.
Furtherr details pl contact:
Vaasthu & cosmic divine energy consultant
98402 49266/ 97899 45280