While it's not strictly necessary to rent a car while staying in a cottage in Hella, it's highly recommended. Hella is a small town, and while there are a few local buses available, having your own transportation gives you the flexibility to explore the surrounding area at your own pace. Many of the popular attractions nearby, such as waterfalls, glaciers, and black sand beaches, are best reached by car, and having a rental car also allows you to easily access grocery stores and other amenities. Additionally, if you are staying in a more secluded cottage, having a car will be necessary for getting around and sightseeing.