This is a paid asset, but now you can download HQ Modular Fantasy House for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
HQ Modular Fantasy House v1.1
Fantasy House Construction Kit it is a hight quality modular pack for creating a different medieval or fantasy scenes. Create thousands of variations interior/exterior houses with windows, walls, stairs, roof, and floor pieces + 50 different medieval objects (tables, chairs, shelves, pottery, boxes, bags, barrels, etc.).
Features:
About 100 modular house pieces.
50 different objects – tables, chairs, shelves, pottery, barrels, etc. (each with LODs).
3 Particle systems.
2 Demo scenes.
8 Premade houses.
Included post processing stack setup profile.
HQ PBR textures optimized for Unity.