Part K Building Regulations
Rise min 150mm.
Rise max 220 domestic, 190 utility, 170 general.
Schools: recomended 150 rise.
Going min 220mm domestic, 250 others.
Going max 300 domestic, 400 others.
Schools: recomended 280 going.
Nosing should be a max of 25mm and open stairs should have a tread overlap at least 16mm.
The handrail should be 900 - 1000mm above front of steps (pitch line) and extend 300mm beyond the end of stair, up and down.
Handrails on landings can be between 900 and 1100mm above.