Does an Otay Ranch home cost more to cool than a western Chula Vista home the same size?
Usually yes, mostly because of climate rather than construction quality. Eastlake and Otay Ranch sit further from the bay's marine buffer and see meaningfully higher summer highs, which means more cooling capacity and often longer daily runtime than an equivalent western Chula Vista home closer to the water. Sizing for the actual load, not just square footage, is what keeps summer bills manageable in the eastern neighborhoods.