https://www.unrealengine.com/marketplace/modular-mansion-mini-pack

This robust set of modular mansion pieces can be used to quickly put an environment together for a cut scene, a background for a presentation, a level for your game, or whatever else you might need. Check out the showcase scene to get a feel for how to best use the pieces together for maximum impact.

Lightmaps are custom crafted and collision has been built by hand with game play and player movement in mind.