Happy to connect and answer any questions you may have. 

Great tools that get updated regularly.I am on the lending side of things and would be happy to hop on a call with you anytime to discuss financial strategies and help answer any questions you may have about nearly any loan product available to help you on your journey, even if they are not products my capital partners offer.We are all here to help you learn and grow.

But you may have already answered your question.

I have a tenant that is not paying rent, and won't answer phone calls or texts, so I need to start the eviction process. 

It's a question that is impossible to answer without some market research.

I reached out to her about a month ago via text messages and calls (which were not answered) to schedule 11 month warranty for my property.

There truly is no right or wrong answer.

You're increasing the need for hot and cold air dramatically and it's doubtful the existing system will be adequate.But, in answer to your original question - yes you will need a permit.

I know this may not seem possible, and probably not the answer you were looking for, but it would be worth partnering with another active investor, bringing in a passive investor(s), or even waiting until you have enough capital to deploy into the right deal. 

.: sounds like the best answer is in the mirror.