The railing will need to go down to the last tread.
The newel post would be attached to the side of the bottom step.
Rail codes around here are from 36"-42" high. The baluster gaps have to be less then 4".
There are "landing size" codes. I think the minimum is 36" at the stair bottom. Your spacing might be grandfathered in. I'd check before building the railing.
In one house I did, the railing had to be removeable to get furniture up and down the stairs. It was an interesting problem.
Ron
The newel post would be attached to the side of the bottom step.
Rail codes around here are from 36"-42" high. The baluster gaps have to be less then 4".
There are "landing size" codes. I think the minimum is 36" at the stair bottom. Your spacing might be grandfathered in. I'd check before building the railing.
In one house I did, the railing had to be removeable to get furniture up and down the stairs. It was an interesting problem.
Ron