Accommodation
Usually, we or employer promote accommodation. It could be a bed in a shared room from 90 euro per week, a private room in a shared apartment. In these cases, expenses for electricity, water, heating, WIFI are usually included. 2-week security deposit is an additional payment. Properties are furnished.
You could find for rent apartment or house yourself, but in this case, you need Belgium ID card and bank account, 1-3 month security deposit, 1-month prepayment, and contracts with local communal companies, as electricity and water. Usually, properties for rent are without furniture.