Fire loss on commercial building

[Christopher Degidio]

I recent had a fire in old out of code commercial building (food establishment) the insurance adjuster estimates for the Replacement cost value on the building is about 40% less than what it will actually cost us to repair the building to code as per our architects plans. 

My question is can I negotiate the cost of total repairs? or am I out of luck and stuck paying the remain cost to get us back open for business? 

The total cost of repairs is well below our insurance building coverage limit. 

I would appreciate any help that can be offered.

Thanks!