It depends a lot on how well it's built/insulated. Our new place has cheaper utility bills with ~2,700 Sq/ft living space compared to our previous ~1,300 Sq ft place. There are a lot of factors to consider aside from just looking at what other people are paying if you want an accurate estimate.
Our bills are ~$325-350 winter including heated garage, and ~$180-$220 summer running A/C every day. That is for gas/electricity/water combined for 2 people.
Water bill will fluctuate a lot depending on how many people are living there and what kind of yard you have (i.e. a big yard with big garden is going to need lots of watering vs. a concrete pad which needs zero).