Environmental Regulation and Housing Supply: Sub-National Evidence from the Dutch Nitrogen Crisis

Abstract

Environmental regulations that constrain housing supply can exacerbate affordability crises, yet credible causal evidence on this channel remains scarce outside the United States. I study the May 29, 2019 Dutch Council of State ruling that invalidated the Programmatic Approach to Nitrogen (PAS), immediately halting approximately 18,000 construction projects near Natura 2000 protected sites. Exploiting municipality-level geographic variation in Natura 2000 land coverage within the Netherlands, I estimate a difference-in-differences model comparing housing outcomes in high-exposure versus low-exposure municipalities before and after the ruling. Building permits declined significantly in high-exposure municipalities relative to low-exposure municipalities following the ruling, with the coefficient on the N2000 share interaction implying approximately 2.7 fewer permits per quarter for a municipality at the mean exposure among those with Natura 2000 land ($p < 0.05$). Housing prices grew 1.9% less in high-exposure areas in the baseline specification, and 4.1% less with province-by-year fixed effects ($p < 0.01$), suggesting that the development freeze depressed local economic activity and housing demand rather than creating scarcity-driven price increases. Event study estimates show flat pre-trends and sharp divergence beginning in Q3 2019, precisely when the ruling's effects on the construction pipeline began to bind. Heterogeneity analysis reveals that price effects are larger in non-Randstad municipalities where the development freeze may have had proportionally greater economic consequences. These sub-national results represent a substantial advance over the parent paper's national-level synthetic control approach, which yielded an insignificant placebo p-value of 0.69 due to the fundamental limitation of N=1 inference. The findings demonstrate that environmental regulations can have economically significant and geographically concentrated effects on housing markets—though not always in the direction that standard supply-restriction models predict—with implications for the global challenge of balancing ecological protection with housing affordability.