Can we build a deck in common area?

Hi Flat Chatters,

You have been very helpful in the past – thank you – and I wonder if
you know the answer to this query?

We hope to get strata and council approval to build a deck across our flat, which stretches across the front of a six-unit apartment block (two flats at the front, four at the back). We would be building in common air space, etc. A real estate agent said if it is done well it will add value to the whole building. But should we compensate the five other owners in any way for allowing us to build a deck, which we will make sure enhances the building? We believe we are good strata members, regularly maintaining the garden plots on the council verge in front of the block (and next door), which we had also planted out to stop people dumping old furniture on the verge (a regular occurrence in Bondi). So, should we compensate other owners if we build a deck in common air space? What do you think? Thanks in anticipation. Cheers, Diana