Steel, Copper, Lumber Price Spikes Squeeze Construction Margins
Construction input prices climbed 1.2% month over month in August and now run 8.9% higher than a year ago, Construction Dive reports, citing new Associated Builders and Contractors analysis of U.S. Bureau of Labor Statistics data.
Market Impact
Steel mill products jumped 23.4% since August 2025, iron and steel rose 17.9%, and crude petroleum climbed 34.9%, according to the ABC report released Thursday. Switchgear, critical for data center builds, rose 12.3% year over year, while copper wire surged 27.2% over the same period. Softwood lumber also posted double-digit annual gains.
“Ongoing input price escalation is likely to weigh on profitability over the next several months,” said Anirban Basu, ABC chief economist. He pointed to escalation in the trade war with Canada and oil prices climbing back above $100 per barrel as compounding factors.
The price pressure is already reshaping project pipelines. About 55% of contractors reported abandonments or delays in the past six months, according to a separate September survey from the Associated General Contractors of America, with one-third of respondents citing rising costs as the reason. “Construction firms are being squeezed by tariff- and war-induced materials cost increases, even as they boost wages to attract personnel,” said Ken Simonson, AGC chief economist. AGC CEO Jeffrey Shoaf added that firms are “caught between pricing themselves out of the market or performing work at a loss.”
What It Means for Subcontractors
- Electrical subs bidding data center or industrial work should lock switchgear and copper wire pricing before submitting 2026 proposals; copper wire is up 27.2% and switchgear 12.3% since August 2025, and both remain volatile.
- Steel-dependent trades, including structural, mechanical and pipefitting subs, should build tighter escalation clauses into contracts given the 23.4% jump in steel mill products and 17.9% rise in iron and steel over the past year.
- Framing and rough carpentry crews should expect continued softwood lumber cost pressure and negotiate shorter price-hold windows with suppliers rather than accepting standard 90-day quotes.
- With one-third of AGC survey respondents citing cost increases as a reason for project cancellations or delays, subs should confirm owner funding and material budgets are locked before mobilizing crews on 2026 work.
- Firms bidding petroleum-adjacent or energy-sector projects should factor in the 34.9% year-over-year jump in crude petroleum costs when pricing fuel-dependent line items like equipment mobilization and hauling.
