non so se qui per accessori si intenda i servizi, ma non è specificato

Sell your house better, faster and for more money by decorating right - [ Traduci questa pagina ]Decorate your House to Sell leaving room for imagination ... Add accessories that make the room more inviting like a soft throw on the couch. ...

Accessori are additional rooms/spaces not used for general living, such as garages, storerooms, washrooms etc. I don't think there is a specific word in English - all the rooms would probably be listed. You could maybe call them accessory rooms.

Bedrooms and parlors are where you spend most of your time. Kitchens, bathrooms, storerooms, laundry rooms, gyms, balconies, etc. are where you go to perform specific acts that usually require special equipment that is either bulky or attached to the building and hence immobile. So they are functional, because they serve a function that cannot be served by bedrooms or living rooms. The exception is storerooms, which contain nothing except space. Balconies are equipped with views of the street. I'm not sure about dungeons.