Staircase guarding area height above a void

[dontyouworry]

We are building a 3-storey house with a staircase void (1.5m x 2.5m) from the ground floor all the way to the roof. We are deciding on the height of the guarding area. What is the minimum height you would feel comfortable with? If it's above 1m, would you prefer a rail attached to the wall (example) or a different rail height along the stairs and along landings (example)?

[ProDave]

There are only 2 heights relevant to building regulations.  A domestic stair and landing, 900mm, and "everywhere else" 1100mm

 

In a similar situation but only a 2 storey house, BC tried to tell me that "landing" only referred to 1 square metre at the top of the stair, and my galleried landing came under "anywhere else" and should be 1100mm high.  Trouble was our chosen domestic handrail system was only available in 900mm high.  A many week standoff ensued while our BC sought clarification and came back and said 900mm was okay.

 

If you don't feel comfortable with 900mm then 1100mm is what you want, but it is likely to restrict your choice somewhat.