County/Township assessment of Bedrooms

[Duston Gladfelter]

Hello everyone, I have two rental properties under my belt (1st two of my RE career!) and I'm looking at ways to bump up the rent. I got this idea from one of the podcasts. Right now both houses are 3 br. but they both have a finished basement with 2 exits (the back door and the staircase). From talking to the township inspector that was out they would both qualify as "legal" bedrooms. How do I go about getting the county/ township to recognize the "4th" bedroom? My main reason for this is because both houses have Section 8 tenants and I know that I can have a higher rent with a 4th BR. One tenant desperately needs the help and it seems like an easy enough solution on my end. 

So, does anyone know how to go about getting the 4th bedroom officially recognized by the local government? And are there any Plus/ Minuses to doing so?

Thank you!