After testing the Chapel LOD one too many times I noticed with Open Cities Reborn there is no LOD for the houses.
In Vanilla, the _far.nifs belong to low res models that are placed in the Tamriel instance of the cities. With OCR, The real houses are there, which have no _far models. I just took the _far models and added them to all house variants. Leyawiin had none, so I created a bunch of new ones.
Those models are no perfect match, but they are very low res and better than having empty cities from afar. I might actually make the textures a bit smaller, because you really don't see much of it. At the moment they are 512x512.