I didn’t see any mention of indoor/outdoor fireplaces or gas grills, but they may be a possible culprit.
We recently moved from a home that had an outdoor fireplace along with an outdoor BBQ gas grill, both of which were directly hooked up to our SDGE gas line. We used the outdoor fireplace pretty infrequently, but we did use the BBQ grill at least 2-3 times/week.
When we moved to another place without a direct gas hook-up to the outdoor grill and no outdoor fireplace, our SDGE bill went down dramatically. Each house had similar square footage and other characteristics, so that’s what we think made the difference.
