Grisedale
Unable to answer "What is the house number of this building?" for https://osm.org/way/269338231 via StreetComplete 33.2:

it is a boat, judging by solid moorings, appears to be for accommodation only.

Attached photo(s):
https://westnordost.de/p/54632.jpg
https://westnordost.de/p/54633.jpg
https://westnordost.de/p/54634.jpg