Belle Chasse cost of living score 105.3 More expensive 5.3% higher than the US average 17.1% higher than the Louisiana average Belle Chasse, Louisiana gets a BestPlaces Cost of Living score of 105.3, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 5.3% higher than the U.S. average and 17.1% higher than the average for Louisiana.