•    Indoor environmental quality (IEQ) was measured objectively and subjectively.
•    IEQ performance of 14 buildings was compared in 3 different green building groups.
•    Generalised linear mixed model accounting for clustering effects was used.
•    Green converted buildings achieved IEQ nearly equivalent to new green buildings’.
•    Green converted building occupants rated improved health and satisfaction with IEQ.


AgnosticPreachersKid [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], from Wikimedia Commons

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