It takes a lot of lumber to build a house, and the price of that wood is going way up.

A new duty imposed by the U.S. Commerce Department on Canadian softwood lumber is designed to level the playing field between Canadian and U.S. lumber producers, and just the anticipation of it has pushed lumber prices higher by about 22 percent since the start of this year.

The Trump administration argues that government subsidies for Canadian lumber are unfair. It’s great for U.S. lumber producers, not so great for U.S. homebuilders, who inevitably pay the price.