Hello everyone! My first post on these forums, my apologies if I'm out of line asking this question. If I am, please point me in a direction where I can seek legal advice. Basically, I've been given inheritance from my grandfather early. My brother and I are receiving a pretty large sum of money (~250k each) and looking to buy a house together. I'm extremely new to the market and work full-time so it's been difficult trying to research on my own so I've just been talking to anyone I can and just found out about this forum. Anyway, I'll cut to the chase and spare you my life story. I've been speaking to a builder and he has recommended building a dual-living house. A house with two separate entries with self contained sections on each side of the house. The house is joined and each section would be completely self sufficient. The property is not approved to have a duplex on it (ie, no separate titles). I've spoken to a lot of people and have got varying opinions. So here are my questions: Is it legal to build this type of house for me and my brother to live in? It would be me living on one side, him living on the other. If at some stage in a couple of years, one of us moves out (for instance, I move out), would I be able to rent out my half to someone? Now the final question is to do with tax, not specifically involving a dual-living built house. If my brother and I buy a house using cash (no debt). Then later on, one of us decides to move out. Is it possible to buy another house using our share of equity from the house we own together? And if so, can we shift the debt back onto the house we bought with cash, in order to offset the rental income with the mortgage repayments. I hope I made that last point clear... For the last point, essentially what I'm saying is if one buys a rental property and their repayments are $400/week. However, this person receives $450/week in rent. Then the person will only have to pay tax on $50 per week. So is it possible to convert a house you bought with cash into an investment property, by taking a loan on another house (which will become my place of residence), and convert the old house into an investment property? Sorry if I'm sounding like a noob. I completely am and I'm just trying to learn. If anyone can point me in the right direction that would just be amazing. Thanks so much for anyone who takes the time to read this essay.