So I'm looking at building a granny flat on an IP I have at Bateau Bay up on the central coast. The existing dwelling is relatively small and with a large already benched rear yard and private side access the property lends itself to having a granny flat at the back. CDC check's have been done and all is good. My question is, by building a 2 bedroom 60sqm granny flat at the back how much equity am I adding to the IP as a whole. Say it costs $110k all up, how would this be reflected?