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According to Mansion Global's Mareesa Nicosia, the wellness real estate boom heightened by concepts such as biophilic design and healthy building standards including WELL are more than a trend—they've accumulated an international wellness real estate market is now a $134 billion industry, according to researchers at the Miami, Florida-based Global Wellness Institute.

According to the Institute, the number of wellness-oriented properties (including residential, mixed-use and commercial) has grown 6.4% annually since 2015 and is expected to continue growing at that pace through 2022, to reach $180 billion. That's half the size of the green building industry, according to the January report.

The U.S. leads the market share at $52.5 billion, followed by China, Australia and the U.K. According to the report, there are more than 740 existing or planned residential projects in 34 countries that include large-scale master planned communities and urban/suburban mixed-use developments.

Particularly in the U.S., while health care spending soars, “we’re becoming more unhealthy as we live longer,” said Ophelia Yeung, a senior research fellow at the Global Wellness Institute who co-authored the report, called “Build Well to Live Well: Wellness Lifestyle Real Estate and Communities.” Naturally, Ms. Yeung said, this conflux has led to people asking themselves “why they invested their life savings in a home that is not keeping them well.”

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