The Turner Building Cost Index rose 5.2% year over year in the second quarter, providing further evidence that construction costs are increasing on an annual basis, even as monthly numbers offered a momentary reprieve. The Turner Building Cost Index rose 5.2% year over year in the second quarter, providing further evidence that construction costs are increasing on an annual basis, even as monthly numbers offered a momentary reprieve. The Turner Building Cost Index rose 5.2% year over year in the second quarter, providing further evidence that construction costs are increasing on an annual basis, even as monthly numbers offered a momentary reprieve. The Turner Building Cost Index rose 5.2% year over year in the second quarter, providing further evidence that construction costs are increasing on an annual basis, even as monthly numbers offered a momentary reprieve. The construction cost yardstick from New York City-based Turner Construction, the industry’s largest contractor by revenue, increased 1.4% from the first quarter ashigh-growth sectors drove demand