With the significant growth in Islamic financial products in recent years, the world's first Islamic real estate investment trust (REIT) was established in Malaysia in August 2006, with these REIT portfolios needing to be Shariah compliant. This paper constructs three Malaysian REIT (M‐REIT) series and assesses the significance, risk‐adjusted performance and portfolio diversification benefits of Islamic M‐REITs in a mixed‐asset portfolio in Malaysia over 2006–2008, contrasting this performance with conventional M‐REITs in Malaysia. While the impact of the global financial crisis is evident, Islamic M‐REITs are seen to be a differentiating property investment product from conventional M‐REITs, as well as displaying the defensive characteristics of low‐risk levels and portfolio diversification benefits to those seen by conventional M‐REITs. These differentiating features and portfolio diversification benefits for Islamic M‐REITs were further evident and enhanced in the global financial crisis; reflecting a degree of robustness not seen in most other global REIT markets during the global financial crisis. The ongoing implications for Islamic M‐REITs and Islamic REITs in other global REIT markets are also highlighted.