The U.S. Supreme Court on Friday struck down the core of President Donald Trump’s emergency-tariff program, a decision that could reduce price volatility for wall and ceiling contractors—particularly on metal-intensive scopes—while leaving other trade duties intact.

In a 6–3 decision, the Court ruled that the sweeping tariffs Trump imposed through a series of executive orders exceeded the authority granted by Congress under the International Emergency Economic Powers Act (IEEPA), a 1977 law meant to address foreign threats during national emergencies.  Chief Justice John Roberts wrote that the administration’s interpretation would amount to an “independent power” to impose tariffs “at any rate, for any amount of time,” despite IEEPA containing “no reference to tariffs or duties.”

The decision covers two major buckets of IEEPA-based tariffs described in the litigation: “trafficking” tariffs aimed at products from China, Canada and Mexico tied to fentanyl flow concerns, and “reciprocal” tariffs that included an initial 10% levy on imports from almost all countries and higher rates on dozens of nations.

Why Wall and Ceilings Contractors are Watching

Interior contractors are sensitive to tariff swings because the day-to-day scope depends heavily on metal and manufactured components, whose pricing can fluctuate rapidly with import costs, availability, and lead times. In wall and ceiling packages, the most exposed categories include:

• Cold-formed steel framing (studs and track) and related accessories<
• Suspended ceiling systems (grid, tees, hanger wire, clips and hardware)
• Fasteners, anchors and specialty hardware used across drywall and ceiling installations
• Metal trims (corner bead, control joints, L-angle and other profiles)

Even if the tariffs at issue are removed, contractors may see the first “relief” show up less as immediate list-price drops and more as fewer surcharges, steadier quotes, and improved quote-validity windows as suppliers re-baseline pricing.

Any easing in material costs may take time to reach jobsites. Distributors typically sell through inventory purchased under earlier cost structures, and manufacturers may be slow to adjust pricing until the legal and policy outlook is clearer.

Economist Alex Chausovsky has also cautioned that tariffs tend to filter slowly through the economy, with about 37% of tariff costs passed to consumers and 9% absorbed by companies, according to his framing.  That dynamic helps explain why a court ruling can change the policy landscape overnight, but bids and invoices may shift more gradually.

The ruling does not eliminate all U.S. tariffs. It applies to duties imposed under IEEPA; other tariffs created under separate trade statutes—including authorities often used for national security or unfair-trade findings—remain in place.

The Signatory Wall and Ceiling Contractors Alliance (SWACCA) underscored that point for interior trades, noting the decision does not affect Section 232 tariffs imposed under separate authority, including duties affecting steel, aluminum, wood products and copper—materials that can still influence framing and ceiling packages.

Related: How Contractors Can Navigate Growth Amid Tariffs and Economic Uncertainty

Costs were Already Climbing Before the Ruling

The Supreme Court decision lands in a market that was already experiencing broad cost pressure. ABC previously reported construction input prices rose 0.2% in September, the fifth straight month of increases, and were 3.5% higher year over year (with nonresidential inputs up 3.8%), while ABC Chief Economist Anirban Basu flagged uncertainty around the effects of higher tariffs on essentials including iron, steel, aluminum and copper. More recently, Walls & Ceilings reported that costs accelerated again in November, with ABC showing construction input prices up 0.6% month over month and 3.4% year over year (nonresidential inputs up 3.8%), while AGC’s analysis pegged the nonresidential construction PPI at +0.4% in November and +3.6% over 12 months—the largest annual increase since January 2023.

At the same time, the steel supply picture has been shifting. W&C reported the U.S. produced 82.0 million tons of crude steel in 2025 (up 3.1% year over year), overtaking Japan for the first time in 26 years, while steel imports as a share of U.S. consumption reportedly fell from about 25% in early 2025 to 14% by November. For wall and ceiling contractors, that mix—higher domestic production alongside reduced import share—matters because it can influence mill lead times and the pricing environment for stud/track and other steel-dependent interior components.

NAHB Chairman Bill Owens said the ruling “reins in presidential authority” under IEEPA but warned Trump “still has wide latitude” on tariff policy. Owens urged the administration to exempt building materials, arguing that tariffs raise construction costs, impede supply chains and create uncertainty that makes it difficult to price homes.

Even if materials stabilize, labor constraints continue to shape bids and schedules. W&C previously reported that 92% of construction firms said they are having difficulty finding qualified workers, and 78% experienced at least one delayed project in the past year, citing an AGC/NCCER survey.

What Comes Next 

Two practical questions now move to the foreground: whether the administration tries to rebuild parts of the tariff agenda through other statutes, and how (or whether) refunds are handled for duties already collected.

On refunds, the Supreme Court did not weigh in on whether or how the federal government should reimburse importers—an issue SWACCA said remains unresolved for IEEPA-linked duties. Justice Brett Kavanaugh, writing in dissent, suggested refund obligations could be substantial.

For contractors, the earliest real-world signals are likely to appear in distributor bulletins, lead-time updates for framing and ceiling accessories, and broader movements in metal pricing benchmarks—before any changes show up consistently in estimates and jobsite costs.