W. K. Lis
Superstar
The station box is 150m, the platform is 100m. This means the station doesn't need to be re-excavated to be able to handle a 6-car subway but rather the storage rooms at track level would need to be relocated. The platform lengths of the Sheppard line are only designed for 4-car trains but could easily be expanded to 6-car trains as well.
They will be like unfinished basements in new houses, not included in the square feet of the house because it is unfinished.