Plunging prices for diesel fuel, lumber, and steel cooled inflation for materials and services used in construction in December, but relief may be short-lived, according to an analysis of government data by the Associated General Contractors of America. Association officials noted that contractors listed material costs as one of their top concerns in a survey the association released this month.

The producer price index for inputs to construction—the prices charged by goods producers and service providers such as distributors and transportation firms—rose 7.2 percent in 2022 despite decreasing 1.8 percent from November to December. The year-over-year rise outpaced the 6.5 percent increase in the consumer price index—the best-known measure of inflation, the economist noted.

The one-month decline was driven by falling prices for fuel, lumber, and steel, while other input costs rose. The producer price index for diesel fuel tumbled 28.7 percent in December, the index for lumber and plywood slumped 3.7 percent, and the index for steel mill products slid 2.7 percent. In contrast, the index for ready-mix concrete jumped 1.4 percent for the month and 13.6 percent for the year. The index for architectural coatings such as paint rose 0.5 percent in December and 26.1 percent year-over-year. The index for copper and brass mill shapes climbed 1.5 percent for the month and the index for aluminum mill shapes increased 1.3 percent.

Some price declines are likely to reverse soon, Simonson warned. Steel producers have sharply raised prices in recent weeks for hot-rolled coil—the raw material for some construction steel, he noted. Major producers of insulation and tile have announced price increases for February. In addition, recent spikes in futures prices on commodities markets for copper and aluminum may signal higher costs for these products soon, he said.

Simonson added that more than 1,000 contractors answered the survey that the association and Sage released earlier in January. Material costs and an economic slowdown or recession were the most frequently listed concerns, with both marked as among the biggest concerns for nearly three out of four firms.

Association officials noted that the Buy America requirements that were part of the Bipartisan Infrastructure Bill, and the confusion associated with the administration’s haphazard implementation of the requirement, will make it hard for contractors to find materials to complete infrastructure projects, raise the cost of those materials and lead to delays in completing the work.