NAHB is concerned that lumber import restrictions could cut supply and boost prices significantly.

Report says infrastructure projects' capital costs total $330 billion; benefits range from $500 billion to $1 trillion.

December rate, not seasonally adjusted, increased to 7.4% from November's 5.7% but declined from year-earlier 7.5%.

Industry economists note that Nov. $1.18-trillion rate was highest since 2006; nonresidential sector's level strongest in eight years.