Sustainable development defined by the Brundtland report of the World Commission on Environment and Development not only gave emphasis to the environmental sustainability but also recognized its relationship with human well-being. Sustainable development considers a balance between social, cultural, environmental and economic aspects to achieve environmental and human well-being. It is argued that sustainable development requires a balance between resource efficiency and behavioural adaptation, and focusing on any one would not ensure environmental and human well-being. Thus, principles of sustainability necessitate living within the environmental limits by achieving both technological and behavioural sustainability. Resource efficiency in terms of technological sustainability means achieving functional efficiency by employing environment friendly strategies such as, reducing resource consumption and using energy efficient products. Behavioural sustainability, on the other hand, is about being sustainable by adopting positive environmental attitudes which encourages taking individual responsibility to tackle environmental problems. It is generally believed that if people have pro-environmental attitudes, they will think about nature protection, would use less resource and hence, would live more sustainably. Quantitative research methods are generally used to evaluate technological aspects of sustainability. However, understanding behavioural aspect of sustainability is not as straightforward, since it depends upon personal characteristics and is subjective in nature. Behavioural intentions of sustainability can be deducted by using environmental attitude approach. Environmental attitudes are widely used to measure environmental concerns.This paper aims to understand behavioural sustainability through environmental attitudes of residents living in an ecologically intentional housing. Ecologically intentional communities, such as ecovillages aim to achieve both technical and behavioural sustainability, without sacrificing quality of life. They are designed to achieve individuals’ well-being in addition to the environmental well-being. Ecovillages are examples of small communities that try to maximise people-environment congruity by developing inter-dependent relationships with the surrounding environment. In the process, the design and community management framework makes certain assumptions about environmental behaviour of the residents. For example, people with pro-environmental attitudes would try to practice low energy lifestyles, engage in waste recycling, water and energy conservation behaviour, and take leadership role in community activities. If the residents do not possess such behaviour, it is unlikely that sustainable outcome and human well-being can be achieved. Thus, it is important to understand the environmental attitudes of people living in ecologically intentional housing. Since environmental attitudes are subjective in nature, this study compares people’s environmental attitudes in two different housing types by comparing the attitudes of people in ecologically intentional housing and in conventional housing – a control group from a nearby suburb. This paper employs two dimensional value based orientation – Preservation and Utilization, to measure environmental attitudes. Preservation expresses the general belief in prioritising preservation of nature. Utilization expresses the general belief that it is right, appropriate and necessary for nature and all natural phenomena and species to be used and altered for human objectives.In early 2011, a questionnaire survey was conducted to a group of people living in an ecologically intentional housing (the Ecovillage) and a contemporary housing (the Observatory) near Gold Coast in south east Queensland, Australia. This study confirmed that majority of the Ecovillage residents had high Preservation attitudes and low Utilization attitudes which aligned with the ethos of the Ecovillage. On the other hand, people living in the conventional housing provided mixed feedback, but majority of them had high Utilization attitudes and low Preservation attitudes.