My client wants to build an addition to her house for her elderly mother to live in. 2012 IRC. It would be approximately 450 s.f., attached to the existing house with direct access between the house and the addition, as well as have its own private entrance. She wants it to have a studio-style combined living area with bed area, bathroom, washer and dryer, and a small kitchen: sink, undercounter refrigerator and cooktop. Would the kitchen be allowed per the IRC? Would this be considered an Accessory Dwelling Unit? Or do I need to talk to the AHJ to get an answer?