Just too hard to tell you. I've had clients in the same house with one having $150/month bills and the next one $780/month. One said they don't heat over 60F in the winter the next one "trying" not to keep it warmer than 72F, but I have a feeling it was much higher. As Lynn says it also depends on how much you are there...are you gone all the time and only at home on weekends or are you there all day every day. Do you take 5 min showers or drain the tank every time. Do you have two people in the house or 10. Do you leave your doors open and cool the world in the summer, etc etc etc. How big is the pool...is it 10,000gallons or 40,000? Who was the builder and what kind of materials did they use? How many AC units? Is it all electric or does it use gas heat and water. Just way too many factors for anyone to really give you a good ballpark. The electric cos used to give you a nice printout with avg for the house over the past few years, but I have not been able to get them to do it lately due to privacy concerns. Sorry we can't be much more help.

That is difficult to state you can contact the utility company to obtain rates, all is based on usage, insulation, radiant barrier, one story two story, vaulted ceilings, is the pool salt water, how often your choice to circulate the pool, lifestyle in the house, does the house face west? , is the home only used after school and work, or is it functioning home during the day has home office, how you set your temp. control during the day, ceiling fans
I hope that helps.

It will depend on when the home was built?