I am considering converting the attached garage at the side of the house into a unit I can let as a stand-alone dwelling. It will have a small kitchen, bathroom and a living / sleeping area. It will have its own front door and own electricity supply. Also own post box I am thinking. So essentially, it is a new "house" What should I be considering when it comes to the above? As the number will be 132A, where my house is 132, will it be subject to property tax? Does it need to be actually registered as a property, or just get the tenant to use 132A and hope the postman picks up on it. Will I have to pay second property tax? Is the separate electric supply a complex thing, or should I maybe have a prepay box in the unit and have it connected to my own supply, possibly making a small gain on my own bill. Should I get the water supply also separated? So many more questions!!