Welcome to the Community! You should list it as an apartment. In the description of the property you'll want to make sure that you spell out that the apartment is part of a larger home but has it's own private entrance. You'll also want to let travelers know that you live there and will be upstairs. Finally, HomeAway doesn't allow shared spaces on the site. So if you were thinking of offering up your laundry room or something, you shouldn't do that. Since this apartment has it's own private entrance, it's not considered shared space. Thanks and happy renting!
HomeAway Community Manager