I own a duplex (side/side) we live on one side the tenants on the other. When our last tenants left we took over one of the bedrooms...making our side a 3 bedroom and the renters side a 1 bedroom, the house was designed for this so it was rather easy. What we did not think about was that the electrical supply would still be on the renters bill...for that 1 bedroom. We learned this shortly after they moved in because of some electrical issues. We discussed this with them at the time and they seemed ok with it, asking that our son turn everything off when not home. They have signed 2 leases since. The last lease included a 75$ increase with a 25$ a month discount to offset the electrical bill. They have done the math and figure they should have been getting this all along and want $1200.00.