Does this seem feasible? Our home is a custom-built 3/1/2 on a great block of land that slopes away from the centre of the house. It is all enclosed underneath and half of it was dug down to make two levels. The back half is used as a workshop, laundry and office... And wine cellar - one corner is partially underground. It is not quite legal height to claim the room downstairs is a bedroom, but we can get away with calling it any of the other names thus described. Or an artist's studio. I want to turn the now unused office into a bathroom/laundry, send Hubby and all his paraphernalia to another house and turn his workshop into a true man cave with a kitchenette and sofa-bed rather than a bank of metal-working tools, cobwebs, iron filings and several classical motorbikes. I've demonstrated to him that installing a toilet will be easy: you should have heard all the passive aggressive reasons why it could not be done. However he tells me that in order to drain the shower we would have to do earthworks around the foundations to dig down into the sewerage drain. This would involve cutting up concrete paths and floors including all the reo, and penetrating the water barrier. Online suburb data for Eatons Hill tells us that a 3 bedroom house rents for $420 a week and a 4 bedroom house for $100 more. The median values are around $485K and $605K. The way I see it is a $10K reno will get us another $100K equity. We would do a lot of the reno ourselves. We would then move into our other rental house so that we can reno it while we live there, having this completed beforehand and revalued afterwards. What do you think?