How earthquakes affect property prices
Seismic risk is one of the few factors that lowers property values for a long time and in a measurable way. This is not a forecast but a finding from markets where the risk has been officially mapped and prices can be tracked for years.
- New Zealand. After the 2010–2011 earthquakes, land in Christchurch was classified by liquefaction risk. By the third year, homes in the highest-risk category had lost 17.7% of their value relative to neighbouring land, and the gap has held steady at around 13%.
- California. When a plot is placed inside an official active fault zone, its value falls by 6.6% on average and its rent by 3.3%.
- Tokyo. According to the official seismic hazard map, land in the riskiest zones is about 10% cheaper than in the safest ones.
- Japan overall. Before major earthquakes, buyers barely priced in seismic risk. Afterwards, the discount in hazardous areas became noticeable and more than doubled.
What this means for a buyer
Three patterns repeat across all these markets.
- Prices react to visible risk. A discount appears once the risk is officially disclosed or the country has lived through a strong earthquake. Earlier risk maps of Christchurch that nobody paid attention to had no effect on prices.
- The building matters more than the country. Within the same city, the biggest discounts hit buildings constructed before current seismic codes, on weak soils or close to a fault. In Istanbul this has shown up in bank valuations since 2023.
- Commercial property is penalised harder. In Wellington, commercial buildings officially classified as earthquake-prone sell for 45% less on average.
For an investor, an earthquake map is therefore not geography but part of the valuation of a property. It shows how likely a shock that changes the price is, and in which parts of the country it is more likely.
What to check before buying in a seismic country
- The year of construction and which edition of the seismic code the building was designed to.
- The type of soil and the distance to active faults.
- Earthquake insurance: whether it is mandatory and what it covers.
- For high-rises, an independent structural report, not just the developer’s documents.
Earthquakes in Turkey and the property market
Between 1926 and 2026 the map window contains 107 earthquakes of magnitude 6 or more, 23 of them of magnitude 7 or more. The strongest was M 7.8.
After the earthquakes of 6 February 2023, the Istanbul market started to differentiate districts by risk. According to 139,913 bank valuations of homes, prices in low-risk districts rose about 4.8% more than in high-risk ones. In hazardous districts, homes built before the 2007 seismic code lose more value than newer ones.
Turkey has compulsory earthquake insurance for homes, known as DASK. The policy is checked when a sale is registered at the land registry, and a mortgage is not issued without it.
Questions and answers
- Does seismic risk affect property prices?
- Yes. Studies from Japan, California, New Zealand and Turkey show that housing in high seismic-risk zones is cheaper, and the gap widens after strong earthquakes.
- How much cheaper is housing in earthquake-prone areas?
- Between 2% and 18%, depending on the study. The gap is largest where the risk is officially mapped: 13–18% in Christchurch, about 10% in Tokyo and 6.6% in California.
- What matters more — the country’s seismicity or the specific building?
- The building. Within the same city, the biggest discounts hit buildings constructed before current codes and those on weak soils or near faults.
- Where does the map data come from?
- The USGS ComCat earthquake catalogue: all events of magnitude 4.5 and above from 1926 to 2026, downloaded on 11 October 2026. Faults are drawn schematically from published reviews.