Darien cost of living score 84.8 Less expensive 15.2% lower than the US average 10.3% lower than the Georgia average Darien (zip 31305), Georgia gets a BestPlaces Cost of Living score of 84.8, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 15.2% lower than the U.S. average and 10.3% higher than the average for Georgia.