Puri Bening Hyato
Located a little to the north of the other places to stay in Toya Bungkah. The more expensive rooms have hot water, and there is a communal hot spring-fed jacuzzi.
Lakeside Cottages
The grandest place down by the lake but still quite simple. Nice views, all rooms have hot water and some of the cottages are really quite large. FYI - reviewed as TERRIBLE 7 out of 10 reviews on Tripadvisor.
Lakeview Hotel & Restaurant
Few overseas visitors ever stay on the caldera ridge road but if you decide to, this is the nicest of the bunch of hotels there. Amazing views, but a strange almost fortress-like design.
Arlinas
Something of an institution in Toya Bungkah, and popular with budget travellers. Located next door to the trekking guide association office. You can chose whether you want hot water or not costs extra, and the rooms have nice verandas with lake views.
Few visitors stay in the area but instead take in the sights during the day. Those that do stay do so for the purpose of climbing Mount Batur pre-dawn, and therefore stay down around Lake Batur close to the ascent start point in Toya Bungkah or at Kedisan on the southern shore.
Putra Mulya
Very simple and cheap rooms and this place on the south shore of the lake which is popular with backpackers for that reason.
Segara Hotel & Restaurant
A variety of rooms here, most with hot water and even some with TVs local channel only. Decent restaurant, internet available, nice views of the lake, and a good source of reliable trekking guides. Ask to see one of their new rooms at the front of the hotel as they are slowly renovating.