The Hidden Tax on Housing: How Soft Costs Are Crushing Affordability
The Hidden Tax on Housing: How Soft Costs Are Crushing Affordability By ML Solutions Research Group · November 8, 2025 Builders are used to talking about lumber, labor, interest rates, and supply chains. But in 2025, the quiet story behind every blown pro forma is different: soft costs—especially municipal fees, specialdistricts, permitting delays, and NIMBY politics—have become a hidden tax on housing. The National Association of Home Builders (NAHB) estimates that government regulation accounts for 23.8% of the final price of a new single-family home in the United States, with 10.5% attributed to development and 13.3% to construction.1 In Washington State, a 2025 analysis found that regulations now account for 29.5% of the final price of a typical new single-family home, approximately $203,976 on a $690,701 house.2 Put simply: what many builders once assumed was a 10–15% “regulation slice” has, in many markets, quietly moved into the 20–30% range. This analysis complements our ongoing work on “Builders vs. Rising Costs” and “The Changing Face of Labor”. Together, they map how today’s builders are being squeezed from every direction. What Counts as “Soft Costs” in Residential Construction? Builders define “soft costs” to mean all of the non-physical inputs required to turn a parcel