I am the daughter of the original owner / builder of this property, built in 1968. I don't have any real emotional attachment to the structure so I wouldn't stand in the way of progress for sentimental reasons.
HOWEVER, I think it is important that you AND the new owners understand the signficance of the bricks used in its construction. They are rare, historic "sandstock" bricks ALL of which came from the Clifton Gardens Hotel in Mosman, which was demolished in 1967.
I want to owners to know this and perhaps the bricks can be recycled once more for another construction. A piece of Sydney history.