Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
If it is a detached home, try modelling it using BEOpt
It will get you a rough estimate of energy consumption very quickly. You could further edit the exported IDF to suite your needs.
Once you are more comfortable with EnergyPlus and results interpretation. Start with a simple model in OpenStudio and slowly build it up.
As you mentioned 462kWh/m2 is high for residential (depends on your climate of course)
ScottB
