Martin has built an insulated door between the basement proper and the bulk head landing and steps. Gotta keep the cold out!
He also put bridging between the joists.
And added a third stringer to the main stairs.
Renovation of a 400 square foot house built in 1922 located in Cornish, Maine. The original foundation was 20 feet by 20 feet. At some point in the house's history a small (10' x 8') addition was put on the back. Later that addition was removed and enlarged to an addition the full width of the house and remained 8 foot deep.