We've added up the cost of our utilities over the 16 months we have been in the new house and have been pleasantly surprised.
The smaller yard and addition of grey water has meant we are using less water than the average household of 2 adults + 1 child, but best of all our electricity has come in at 1,400 for 16 months.
Very impressed with our PV cells and solar HW - they are saving us a fortune compared to the electricity bills we incurred in former homes. And just maybe the passive design e.g. wide eaves and heavy curtains are paying off .
Hope this all helps to keep our ecological footprint at a minimum.