Converting patio into livable space.

[Pedro Cardoso]

Hey everyone! I have a rehab-related question that tI was wondering if someone could provide some clarity on. 

I am doing the rehab on my first OOS BRRRR in Kansas City, KS and part of the project consists in converting an external patio area into liveable space and therefore increasing the overall square footage of the house. The contractor is working on the property under a general building permit, but I would be curious to know if I need to get any specific permit to make sure this increase in sq footage gets reflected in the property records, so when I go to refinance the house I get the ARV based on a higher sq ft.

In other words, what is the process to record the increase in liveable sq footage to guarantee that gets reflected in the appraisal?