Construction materials prices dip in September, but continue to outstrip bid prices over 12 months: AGC

agc input prices chart september

The prices contractors pay for construction materials far outstripped the prices contractors charge in the 12 months ending in September, despite a recent decline in a few materials prices, while delivery problems intensified, according to an analysis by the Associated General Contractors (AGC) of America of government data released today. Association officials urged Washington officials to end tariffs on key construction materials and take steps to help unknot snarled supply points.

“Construction materials costs remain out of control despite a decline in some inputs last month,” Ken Simonson, the association’s chief economist, said in an Oct. 14 statement. “Meanwhile, supply bottlenecks continue to worsen.”

The producer price index for new nonresidential construction—a measure of what contractors say they would charge to erect five types of nonresidential buildings—rose 5.2 percent over the past 12 months, despite a decline of 0.9 percent in the latest month. From September 2020 to last month, the prices that producers and service providers such as distributors and transportation firms charged for construction inputs jumped 17 percent, Simonson noted.

There were double-digit percentage increases in the selling prices of most materials used in every type of construction with the exclusion of lumber and plywood, which fell 12.3 percent during the past 12 months.

The producer price index for steel mill products increased by 134 percent compared to last September. The index for copper and brass mill shapes rose 39.5 percent and the index for aluminum mill shapes increased 35.1 percent. The index for plastic construction products rose 29.5 percent. The index for gypsum products such as wallboard climbed 23 percent. The index for insulation materials rose 19 percent, while the index for prepared asphalt and tar roofing and siding products rose 13.1 percent.

In addition to increases in materials costs, transportation and fuel costs also spiked. The index for truck transportation of freight jumped 15 percent. Fuel costs, which contractors pay directly to operate their own trucks and off-road equipment, as well as through surcharges on freight deliveries, have also jumped.

Association officials added that many contractors are experiencing extreme delays or uncertainty about delivery dates for receiving shipments of many types of construction materials. The association officials urged the Biden administration to immediately end tariffs on key construction materials. In addition, they asked for an all-out effort to help ports and freight transportation businesses move goods more quickly

“The tariffs on lumber, steel, aluminum, and many construction components have added fuel to already overheated prices,” said Stephen E. Sandherr, the association’s chief executive officer. “Ending the tariffs would help immediately, while other steps should be taken to relieve supply-chain bottlenecks.”

View producer price index . View of gap between input costs and bid prices. View the association’s .


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