How much will it cost to build a single story shell

[Pape Diokhane]

Good evening, I have a commercial corner lot in Philadelphia. I plan on building a barbershop on the property, approximately 900-1,000 sqft. I would like for a contractor to just build a shell, maybe out of cinder block if that’s the cheapest but efficient method. It will be one story, maybe 18X60 Please if possible, would anyone mind giving me a rough estimate on how much it would cost to build the shell including the foundation? Thank you very much in advance.