There are many online platforms that specialize in arranging fitter rooms, such as
- HRS,
- Booking.com,
- Airbnb,
- Monteurzimmer.de
- or Monteurwohnung.de.
There you can search for fitter rooms in different regions and also read the reviews of other tenants to make an informed decision. However, it is important to check the seriousness of the provider and also to pay attention to contractual details and additional costs.