Pointing to "alarming obsolescence," Zisler Capital Associates released a report of a new economic analysis stating that "as much as 70% of the total inventory faces an alarming period of repricing due to fast-paced obsolescence, accelerated by COVID but exacerbated by evolving environmental and health standards." The report also suggests that for 30% of the existing office stock, retrofitting and upgrades may be economically unfeasible.

The report continues to note that "strict new government standards for energy efficiency and growing tenant demands for healthy, safe, and energy efficient office environments with ample modern amenities" will grow over time, adding pressure to office properties.

Author of the study Dr. Randall Zisler wrote, "Obsolescence already has created a 'green' premium of 6% for leases in sustainable buildings that can meet government energy standards and achieve carbon neutrality. In addition, tenants are now willing to pay a 'health' premium, significantly pushing rental rates up over other office space, separate and apart from the green premium."