Office rents depreciate 1.4% annually, renovations reverse 8.2%
A Bank of Japan working paper finds that office rents in Japan depreciate at a consistent rate of 1.4% annually for about 25 years. Renovations can reverse this depreciation by approximately 8.2 percentage points.
Aging's steady toll on office values
Office rents in Japan generally depreciate at a consistent rate of 1.4% annually for about 25 years after new construction, a trend that aligns with prior studies on commercial property in the United States.
After this initial period, the rate of depreciation gradually slows.
The pace of this decline varies based on property size; large-scale properties depreciate slightly faster than small-to-medium properties.
However, once their depreciation rate diminishes, large properties tend to maintain a relatively stable state, while small-to-medium properties continue to depreciate.
Crucially, renovations can reverse depreciation by approximately 8.2 percentage points at most compared to rents at the time of new construction.
This reversal effect lasts for about 16 years, during which an average mitigation effect of 5.4 percentage points in depreciation is observed.
Updating the price index methodology
The Bank of Japan's Services Producer Price Index (SPPI) currently accounts for aging-related depreciation of office properties, considering it a decline in service quality.
However, the existing methodology relies on empirical analysis from 2007 data, which does not adequately reflect significant external changes since then, such as recent upward trends in property prices, innovations in construction technologies, and the impact of the COVID-19 pandemic.
This study addresses these discrepancies by empirically measuring aging-related depreciation using a highly accurate estimation method and an up-to-date dataset.
It applies the hedonic method to analyze the impact of property attributes, including building age, on rents, utilizing comprehensive data from the XYMAX Group.
Bridging a crucial data gap
This study provides a much-needed empirical update to the Bank of Japan's Services Producer Price Index, addressing outdated assumptions from 2007.
By leveraging new data and the hedonic method, it offers robust insights into office rent depreciation and the tangible benefits of renovations.
The findings are vital for accurate macroeconomic statistics and informed real estate investment decisions.