I purchased a house which can turn to duplex on Dec 15 at 1.45 mil. This property is currently renting out and I want to knock it down and build 2 duplex on year 2020. My question is : How can I claim negative gearing for about 2 years and turn it to my main residence? Can I keep both duplex as main residence ( I own one and my husband own the other, parents from both sides will move in + kids)? If I do so, when I sell it, do I still need to pay CGT? Looking for professional advice. Thank you in advance.