Bayou Blue cost of living score 85.9 Less expensive 14.1% lower than the US average 4.4% lower than the Louisiana average Bayou Blue, Louisiana gets a BestPlaces Cost of Living score of 85.9, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 14.1% lower than the U.S. average and 4.4% higher than the average for Louisiana.