The largest share of student housing in Utrecht is provided by private home owners. You can find these listings by searching housing platforms, by registering with a rental agency or enquiring with private or commercial landlords for a place to stay.
Although rented housing is regulated on both local and national level, commercial landlords and agencies might not always stick very strictly to the regulations. There are ways to overcharge rent in relation to the size or amenities of the room, or to charge an unspecified monthly service fee, on top of or included in the rent. Some agencies charge an administration fee or a ‘search assignment’ fee, especially in cases where they mediate for a third party. This is not always illegal and it does not necessarily mean that the rooms they rent out are not good.
Many students -Dutch as well as international students- agree on additional conditions because they like the room, or because it is their best option. In case of doubt, you can have your rent and rental conditions checked by a legal helpdesk. However, if you suspect scamming ( a fake room offer), don’t take the risk.