Price recovery after the flood: risk to residential property values from climate change-related flooding
2024
Nguyen, Quyen | Thorsnes, Paul | Diaz-Rainey , Ivan | Moore, Antoni | Cox, Simon | Stirk-Wang, Leon
We take advantage of a combination of a severe weather event from 3 to 4 June 2015 and a local policy, to investigate the housing market response to climate changerelated flooding hazard. The study focuses on a residential area in a low-lying coastal suburb of Dunedin, New Zealand, where the groundwater level is shallow and close to sea level. An unusually heavy rain event in June 2015 resulted in flooding of a significant portion of land in especially low-lying areas. The city council responded by reviewing processes for storm-water management and by imposing minimum-floorlevel [MFL] requirements on new construction in the low-lying areas previously identified as at risk of flooding. Applying a ‘diff-in-diff-in-diff’ strategy in hedonic regression analyses, we find that houses in the MFL zone sell for a discount of about 5 per cent prior to the flood. This discount briefly tripled in the area that flooded, but disappeared within 15 months, indicating either very short memory among homebuyers or no long-run change in perception of hazard.
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