Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Viking Village Free.
Viking Village v1.4
This pack contains 7 houses and 14 decoration models to create a viking village. There is a sample scene and there are LODGroup prefabs for every model to render with as less polygons as possible. Buildings have up to 4 LOD stages included, plus some of them have interiors.
Here are few examples of LOD polycount:
Longhouse LOD0-4271, LOD1-2350, LOD2-1872, LOD3-348
Storehouse LOD0-1846, LOD1- 1106, LOD2-771