In case I choose to get permits from the city what do I need to provide them?

First you need to make sure a short term rental is permitted in you area and on your lot.Then realize you will possible have people coming and going at hours that you might not care for.You can always try it and switch back to a LTR if you don't like it.

Some town require a permit.

The mold was found inside the walls near old windows and by the water heater where complete re-piping  was done last year without appropriate permits.

[If you are doing a more sustainable approach then triple your budget for MEP/HVAC as it is a more complex system to have a self-sufficient system.] 2- Foundation details as mentioned above. 3- Soft Cost: Architecture & Engineering cost for permitting, filings, inspections, etc.

Before moving forward, I’ll explain to him that there will be no way that I could permit him to break the lease again, regardless of the circumstances.

He also states I need to file for a building permit to change the zoning certificate from 1 unit to 2.

@Gary Bahl make sure to check with your city and state to make sure you understand any licensing, insurance permit requirements etc.

You will also want to pull a permit(s) from the county for things such as septic and driveway (these vary based on what you plan to do)#3.

I use that for EVERYTHING now - from signing building permits, to leases, to even bank apps.