Basement and ground floor of @thingsi3dprinted’s slab of Figpine.

 

Build guide – you can chance the styles but you need to keep the following:

• floor levels (this might mean the ground floor slabs are lowered half a block)
• keep your trap door in your basement (secrets – shhhh – you can hide it under something too)
• keep your basement fully walled
• Remember you have neighbours – maybe no neighbours into their buildings…