North Berwick cost of living score 109.9 More expensive 9.9% higher than the US average 13.3% higher than the Maine average North Berwick (zip 03906), Maine gets a BestPlaces Cost of Living score of 109.9, which means the total cost of housing, food, childcare, transportation, healthcare, taxes, and other necessities is 9.9% higher than the U.S. average and 13.3% higher than the average for Maine.