[Are fire doors needed in 4 storey 1920s house?]

The basement revovation will need to comply with buiding regulations as we require structural work, inc underpinning.

[Are fire doors needed in 4 storey 1920s house?]

Hi, Ive recently bought a 1920s 4 storey house, and im planning to replace the original pine doors which have been dipped and are falling apart. We are undertaking a general rennovation to the house - replastering, relocating partitions, new roof, windows, basement rennovation etc, but not sure if this all means I have to install firedoors to meet modern regulations. Any advice is welcome!