And I have suffered the economic injury of my renovation being slowed by at least a month, due to the city closing its city building and permitting offices, and the injury of losing the opportunity to flip this property at a small profit.

If the property has non permitted work it will be near impossible to secure a loan for a buyer to purchase the property.

Any type of commercial loan where you are permitted to keep a property in a JV or LLC name is just out.  

That being said, people create apartments out of basements all the time, most of the time without permits or approval. 

The county code compliance agent completed an inspection (without me there), and has questions about some construction that's obviously been done without permits since the original building (but not done by me).

I also have it set to alert me when permits are pulled as well. 

I looked into adding a bedroom but restrictions due to inadequate parking did not allow the permit to be pulled.

Originally posted by @Matthew Paul:Only worry if someone buys those rights and starts digging on your land at least as it relates to the west coast getting a permit to surface mine is next to impossible in most areasnow in Coal country IE back east thats another kettle of fish..

This approach results in long term happy renters, which means my land lording is mostly hassle free, which is important to me.Then again, if you want to get rid of these tenants, and your lease and PA law permits it, then I guess you have the option of not fixing it. 

Especially curious about scenarios where zoning already permitted this or what facilitating re-zoning has looked like for others in the past