We have been building homes for over 40 years, and have been doing blower door tests on our houses since the ‘80’s. We can probably pull the files on a home of similar size and features to yours, and tell you what the energy cost forecast was for that home.
There are other factors that determine your total costs, such as taxes, insurance costs, and your personal habits. Are you home all day using energy? Or do you work all day and really only inhabit the home during nights and weekends? This makes a difference to your electrical costs because of time-of-use pricing. If you like to keep the thermostat set at 80 degrees, you’ll use more heat energy than a family who keeps their home closer to 70 degrees.