National nonresidential construction spending rose 0.5 percent in September, but is down 0.9 percent on a year-ago basis, according to an Associated Builders and Contractors’ (ABC) analysis of data published by the U.S. Census Bureau. On a seasonally adjusted annualized basis, spending totaled $775.6 billion, 2.4 percent lower than the cyclical peak in April.

Private nonresidential spending fell 0.3 percent on a monthly basis and is down 5.7 percent compared to the same time last year, while public nonresidential construction spending expanded 1.5 percent for the month and is up 6.6 percent for the year. This comports neatly with the employment report and GDP data released earlier this week, which revealed ongoing growth in outlays for infrastructure but declining investment in structures.

“Construction spending contracted in a number of private segments, including in the commercial and lodging categories,” said ABC chief economist Anirban Basu. “While it would be easy to attribute this to a slowing economy and/or growing concerns regarding the saturation of available space in certain private segments, there are also large-scale economic transformations playing a role. Commercial construction spending is down nearly 19 percent, as traditional retailers continue to contend with the growing presence and capabilities of e-commerce giants, while those in the lodging segment—which dipped in September and is essentially flat year-over-year—are increasingly competing with online platforms such as Airbnb.”

Meanwhile, public construction remains one of the strongest elements of the U.S. economy, Basu said. “Spending in the water supply category surged nearly 6 percent in September and is up 20 percent on a year-over-year basis. Overall, public nonresidential construction is up nearly 7 percent over the past 12 months as state and local government finances enjoy their best health in more than a decade. While there were some declines on a monthly basis in certain public segments in September, year-over-year spending is up more than 6 percent in the highway/street category, by nearly 6 percent in the transportation segment and by nearly 9 percent in the public safety category.”

Basu said leading indicators including the American Institute of Architects’ (AIA) Architecture Billings Index, continue to point toward sluggish growth or worse in private construction. “Public construction spending, by contrast, should remain a source of economic expansion during the months ahead, but the looming insolvency of the Highway Trust Fund must be addressed soon for momentum to persist. In September, nine of 16 nonresidential construction segments experienced a decline in spending, and there has been a negative trend in place since April. Accordingly, viewed from a high-level perspective, the outlook for nonresidential construction spending is becoming increasingly uncertain, though available data regarding backlog suggest that the industry will enter 2020 with residual momentum.”