This study examines how localized carbon reduction policies affect corporate environmental productivity. Leveraging a quasi-experiment from China’s low-carbon pilot policy rollout across cities, we implement a difference-in-differences approach to estimate the causal impact of these interventions. Pilot policies significantly increased regulated polluting corporate environmental productivity by around 3 percentage points. The productivity gains persisted over time and were greater for financially constrained firms, firms facing less market competition and with lower capital intensity. Additional analysis reveals the pilots enhanced executive environmental awareness. Overall, our results demonstrate appropriately designed local regulations can improve environmental productivity.