Fallbrook cost of living score 154.9 More expensive 54.9% higher than the US average 3.3% higher than the California average Fallbrook, California gets a BestPlaces Cost of Living score of 154.9, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 54.9% higher than the U.S. average and 3.3% lower than the average for California.