Internal door minimum width
I've just bought a 1930 semi-detached and I need to fully renovate it. I'm considering the option of adding a door below the stairs but there are around 70cm of available space.
I've read that there are regulations about accessibility and minimum width for doors, however this is an old house so I'm not sure if they apply here.
I've asked a structural engineer as we need to open some other walls but anyway he wasn't sure about regulation.
I understand the intent for new houses but it's quite ridiculous to make it apply to old houses.
Any suggestions would help and if you need more info, let me know.
Thank you