Demolishing old external brick wall - post extension

[Tsst]

Hi All,

I recently had a double storied rear extension completed - both first fix and second fix. After moving in I realize that the space around the open living area is not as per my expectations and want to demolish one of the structural internal walls to help add some open space. This is a old external wall ( which has become internal wall after the rear extension ) - about 250mm thick and I want to demolish about 1.5m of this wall. 

Is it even possible to perform such structural alterations ( possibly adding a steel beam ) after all the major build work is complete ? 

Thank you for your time in perusing through my query. 

[Russell griffiths]

As long as you don’t mind lots of mess everything is possible 

I would go back to the original structural engineer and get their opinion. 

[saveasteading]

3 hours ago, Tsst said:

Is it even possible

Most things are possible, but the disruption and cost must be considered.