You have to know local code, most of times it is 7.5, but can be as high as 8.25. Ideal is 7-7.25 with 10" treads. Most comfortable to walk and easy for kids and old people is 7" riser with 10" treads. L shaped is slightly difficult, I just learned myself and redid my staircase, changed from 8.25 to 7.50. You also have to figured the headroom, code is 6.8, but the higher the better. Don't forgot to add 3/4 for the hardwood floor. Good luck.
