Building material costs increased by 6.7% over the past 12 months, according to results from the survey for the July 2026 NAHB/Wells Fargo Housing Market Index (HMI).
A large majority (72.9%) of the home builders responding to the survey reported that their cost of materials for the same house increased by up to 15% over the past year. The most common response (28.4%) was that material prices increased by 5% to 9.99%, followed by 22.4% who indicated a less than 5% change, and 22.1% who indicated increases from 10% to 14.99%.