You should consult your condo MSCT on the type of modification you can do to your unit.
I recently sold a Penthouse in a development that has approved modifications. Do let me know if you're keen to explore this option, as there's another unit for sale.
Should you need any further assistance in matters relating to property, please contact me at my mobile 9748 6305. I will be happy to assess and share with you the possibilities for you and your partner in the current market.
You need to consult with MCST on renovation
Or if you think that the open space is a waste of space, maybe you want to consider other layout?
Please contact me at (65) 96608508 or Silviayang8@gmail.com for further discussion