Commercial property markets in major cities of the world have experienced significant transformation by the global clamour for incorporation of sustainability in commercial buildings through the introduction of various local and international rating tools. The effect of this trend is the potential emergence of green office property sub-market with a seemingly competitive edge over the non-green office market. This in turn could bring implications for the demand and depreciation of non-green offices. This paper presents a framework for analysing these processes, assesses the evidence so far on these developments and sets out a research agenda.