Level creation workflow

My main workflow for the level base will be creating modular kits which i use to create rooms and spaces in Unreal Engine.
Under is a picture showing my main base modular pieces i used in the whitebox level but also to build my rooms. It consists of several wall pieces such as doorways and pillar but also a floor piece which is also used as roof.
I used Silent Hill P.T hallway as a prototype scene when i was creating the modular kit and trying it out in the game engine. If i could recreate that hallway using my modular pieces they will be a good base when building my current level.

Every wallpiece consists of two tileable materials, this way i can easily swap out the material on the wall, and the walls border details. The floor are also tileable materials only which can easily be swapped out for more variety.

Example, my main modular base kit.

With this workflow i can easily create rooms, redesign the rooms, and add rooms and hallways.