If you are an international student over 18 you can choose your own private accommodation. Many international and domestic students in their second year and beyond live in private housing and have a positive experience.
However, if you're a Study Abroad student we recommend using University Flats (Uni Flats) to avoid getting locked into a long contract. Also consider that many private houses are unfurnished so you may need to buy everything for your house, which might be difficult and expensive if you are only staying for a short period.
Students also risk renting poorly-maintained houses which can be cold or mouldy. If you want to live in private accommodation, make sure you inspect the house thoroughly before signing a lease.
If you're under 18 you can only stay in specific kinds of accommodation as per the Code of Practice for Pastoral Care of International Students. Please see the list on the International Office website.