Supreme Court Rejects Trump’s Sweeping Emergency Tariffs in Key Ruling for Homebuilders

The Supreme Court has issued a ruling that sharply limits how President Donald Trump can use emergency powers to impose broad tariffs, forcing major changes to his signature trade program.

​The 6 to 3 decision issued Friday holds that the International Emergency Economic Powers Act (IEEPA) does not authorize Trump's across‑the‑board "reciprocal" tariffs on most imports simply to reduce trade deficits or rebalance trade.

“In short, IEEPA does not silently transform the President’s power to ‘regulate importation’ in emergencies into an open‑ended license to rewrite the Nation’s tariff schedule,” Chief Justice John Roberts wrote in the landmark opinion.

The ruling comes 10 months after Trump announced his sweeping "Liberation Day" tariffs on nearly every country in the world, imposing steep taxes on many imports that have raised materials costs for homebuilders.

Although details of the tariffs underwent constant revisions as Trump made exemptions and hammered out side deals with individual trading partners, they nevertheless represented a steep increase in taxes on many imported goods.

Trump made tariffs his signature economic policy, arguing that the duties were needed to protect American industry, rebalance unfair trading relationships, and boost government revenue.

The federal government has collected significant revenue from tariffs, with collections reaching $118 billion in the four months through January 2026, significantly higher than at any point in modern history.

Following the Supreme Court ruling, the government will have to return roughly half of that tariff revenue back to importers, in a boost to the private sector but potentially exacerbating federal deficits.

Trump calls the opinion 'ridiculous'

In a press conference shortly after the decision, Trump said the decision was "extremely disappointing" and "ridiculous." He said the Democrats on the court are a "disgrace to our nation."

Trump insisted that all national security tariffs under Section 232 of the Trade Expansion Act of 1962 and Section 301 of the Trade Act of 1974, remain in place.

He also said he would impose a 10% global tariff using Section 122 of the Trade Act—a limited provision that requires they expire after 150 days. Trump said he had the "absolute right" to do so.

"The Supreme Court's ruling on tariffs is deeply disappointing and I'm ashamed of certain members of the court, absolutely ashamed for not having the courage to do what's right for our country," Trump said from the White House, praising dissenters.

Later he added: "They're very unpatriotic and disloyal to our Constitution."

Trump further said he would initiate some investigations of unfair trading practices of other countries. Still, Trump said he had "great alternatives" to the tariffs. He cited sections of the Tariff Act of 1930, which he said could justify tariffs but that it might be a longer road to do so.

But the president said he doesn't need to work with Congress on tariffs, something House Speaker Mike Johnson called for after the decision. "I don't have to, I have the right to do tariffs," Trump said.

Ruling could ease cost pressures on homebuilders

Friday's ruling should modestly reduce input costs and uncertainty for many homebuilders, although it is not necessarily a game-changer as many core housing-relevant tariffs will remain in place under other authorities.

Notably, the ruling does not touch Trump’s Section 232 and Section 201/301 actions, so existing tariffs on steel, aluminum, many China‑origin goods, solar panels, and some lumber and cabinetry products remain in place.

For Canadian softwood lumber and derivative products, which account for about a quarter of the lumber used in residential construction, Section 232 increases have lifted the combined tariff rate to about 45% in many cases, separate from and untouched by the IEEPA decision.

Still, tariff relief will come in some categories. A recent analysis from Brookings flagged drywall gypsum, doors, windows, and frames as categories particularly exposed to the IEEPA tariffs that have been struck down by the Supreme Court.

The ruling also delivers much-needed clarity to homebuilders, allowing them to set pricing strategy more accurately for long-term projects and lowering the risk they will be caught on the wrong side of cost spikes on imported components.

National Association of Home Builders Chairman Bill Owens noted in a statement that while the Supreme Court’s ruling reins in presidential authority to impose tariffs under IEEPA, Trump retains wide latitude in setting tariff policy.

"With the nation facing a housing affordability crisis, NAHB urges the president to exempt building materials as part of his tariff strategy because they raise construction costs, impede supply chains, and result in market and business uncertainty that make it difficult for builders to price their homes," said Owens.

Owens added that the NAHB will continue to work with the administration and Congress to "remove regulatory obstacles that hinder the construction of new homes and apartments."  

Justice Kavanaugh pens strong dissent

Justice Brett Kavanaugh wrote a strongly worded 63-page dissent to the tariff ruling, in which he was joined by Justices Clarence Thomas and Samuel Alito.

Kavanaugh wrote that while Trump's tariffs have generated "vigorous policy debates," it is not the court's role to settle policy questions, only questions of law.

"The sole legal question here is whether, under IEEPA, tariffs are a means to “regulate ... importation,” wrote Kavanaugh. "Statutory text, history, and precedent demonstrate that the answer is clearly yes: Like quotas and embargoes, tariffs are a traditional and common tool to regulate importation."

Kavanaugh also warned of the logistical fallout from the ruling, writing that “refunds of billions of dollars would have significant consequences for the U.S. Treasury.”

He also notes that the ruling “says nothing today about whether, and if so how, the Government should go about returning the billions of dollars that it has collected from importers.”

Kavanaugh warns that many importers already passed tariff costs through to consumers, raising hard questions about who ultimately should get their money back, and how to operationalize any refund scheme.