The majority of human and direct economic losses from natural hazards occur as a result of damage to the built environment due to the vital role that the built environment performs in serving human endeavours. One of the key reasons for people in developing countries to be more vulnerable to natural disasters than their wealthier counterparts is the limited capacities in their construction industries. Among the people in developing countries, women are evidently even more vulnerable to natural disasters. Due to higher disaster vulnerability of women, recognising the different roles, capacities, vulnerabilities and needs of women, and considering them in disaster risk reduction in the built environment is significant to reduce women’s disaster vulnerabilities. Gender mainstreaming as a way of bringing a gender perspective into disaster risk reduction can be applied to recognise the varying needs and capacities of women, and integrate them into disaster risk reduction in the built environment. The paper in this context aims to demonstrate how gender mainstreaming helps to bring a women’s perspective into disaster risk reduction in the built environment. It identifies two main steps which involve in the process, identification of women’s DRR knowledge and needs, and integration of the identified DRR knowledge and needs into DRR in the built environment. The paper provides an account of the process that the study established to incorporate a gender perspective into disaster risk reduction in the built environment based on a case study conducted in Sri Lanka. It further discusses how the social, economic, political and environmental context influences the process of gender mainstreaming in disaster risk reduction in the built environment.