Comments Lumber prices have increased more than 180 percent since last spring, and this price spike has caused the price of an average new single-family home to increase by $24,386 since April 17, 2020, according to the NAHB standard estimates of lumber used to build the average home. The market value of the average new multifamily home has increased by $8,998 over the same period due to the surge in lumber prices, according to http://nahbnow.com Random Lengths reported the price of framing lumber at more than $975 per thousand board feet. That is a 180 percent increase since last April when the price was about $350 per thousand board feet.