What is the BUILDING REGULATIONS of staircase ?

To set the scene, let’s imagine a typical London townhouse that is undergoing a substantial refurbishment, and you’ve been given the task to design a cantilevered staircase for it. Now, where would you start?

Well, before we run off to the drawing board, the first thing to do is to familiarise ourselves with the relevant building regulations. Below is a table taken from showing the maximum and minimum dimensions for rise and going. As we are working on a residential project, we only need to concern ourselves with the regulations related to private stairs.