Submeter for a Garage Apartment

[Eric Williams]

I just closed on a house in Baytown with a detached garage that already has water and electric run to it, so the plan is to convert the garage into a garage apartment that I will rent out separately

I contacted the city and they say that they will not allow me to get separate meters for the garage apartment, so I have been looking into installing submeters.  If anyone has any experience with installing electric and water submeters on a small multi family I would be really grateful for any advice.  I have asked my contractors and neither of them seem too familiar with this.

An online search shows lots of different options for wireless monitoring where usage can be monitored using an app.  Has anyone tried doing this before?  

Also open to any suggestions on how to structure the contracts of the houses to allow for tenants to be responsible for the water and electric bills.