Mystic cost of living score 106.8 More expensive 6.8% higher than the US average 4.5% lower than the Connecticut average Mystic (zip 06355), Connecticut gets a BestPlaces Cost of Living score of 106.8, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 6.8% higher than the U.S. average and 4.5% higher than the average for Connecticut.