We would like to replace the above window with a door. Sadly the door would need to be wider, but would only need to be another 1/2 brick to be about the min. width we'd require.
The window is in an extension that was done in the 80s (I think, no earlier than 70s) - it is a cavity wall.
What's the best way to find out what's going on lintel wise here? Or generally the best was to proceed?
Thanks in advance.