The article argues that housing affordability can no longer be understood through prices and mortgage rates alone. Climate insurance has become a third first-order cost, rising sharply since 2019 and diverging by region as catastrophe losses and reinsurance costs climb. Because lenders require coverage, insurance now shapes whether transactions close at all, especially in markets such as Florida, Louisiana and California where private coverage is retreating or becoming prohibitively expensive.

It also identifies a measurement failure. CPI and PCE understate the true premium shock, so official inflation misses the financial strain households face. Insurance markets are repricing climate risk faster than home prices and mortgages, creating mispricing that could correct abruptly. The piece concludes buyers must treat insurance availability, premium volatility and climate risk as core affordability inputs, not footnotes to the mortgage calculation.