Quick way of getting a rebuild letter for legal non-conforming

[Paul Nicklin]

Has anyone had experience with getting a rebuild letter from Philadelphia? I was about to close on a refi when my mortgage company through me a curve ball needing a structural report and a rebuild letter. I have a legal non conforming property which, in the event of a fire, they need to know I can rebuild as is. 

Any advice would be appreciated. I reached out to the zoning department but not getting anywhere with them.

I am also half way around the world, so finding it tricky to get them on the phone.

Thanks, Paul