Problem Definition: The transition towards sustainable consumption patterns in the built environment has gained increasing attention in recent years, driven by the significance of reducing environmental impacts and improving resource efficiency. Recent advancements in Information and Communication Technologies (ICT) and the Internet of Things (IoT) have opened up new opportunities for mainstreaming sustainable consumption in the building sector. Building monitoring systems (BMS), enhanced by IoT, enable real-time data collection and smart management of resources, supporting the optimization of building performance. The BMSs enable various enablement effects such as improved energy efficiency, occupant behavior change, space use efficiency, fault detection and diagnosis and resource optimization. However, there is a gap in understanding the extent to which the enablement effects can lead to long-term reduction in environmental impacts. Furthermore, the lifecycle environmental impacts of these systems, including production, deployment, and maintenance, raise questions about their overall sustainability.

Methodology: A systematic literature review has been conducted, focusing on peer-reviewed journal articles, conference proceedings, and technical reports published over the last 15 years. The review covers several topics including:

· The evolution of ICT and IoT technologies in building monitoring systems; 

· The enablement effects of these systems, including energy efficiency, occupant behavior change, and resource optimization; 

· The environmental impacts associated with the lifecycle of BMS, from production to end-of-life disposal.

· The challenges and strategies for mainstreaming these technologies and their implications for sustainable lifestyles, behavior change, and policy.

Results: The review identifies several primary enablement effects of IoT-based BMS including energy and water use efficiency, space use efficiency, promoting environmentally conscious behavior, decision-making support, fault detection and diagnosis, and predictive maintenance. These effects result in resource efficiency, and reduction in greenhouse gas emissions. However, the lifecycle environmental impacts of these systems, such as material use for electronics and the energy required for data storage and processing, present a challenge. The results suggest that while the enablement effects justify the implementation of BMS in certain cases, particularly in high-impact, high-consumption buildings, a comprehensive assessment of lifecycle impacts is essential to ensure long-term sustainability. Furthermore, mainstreaming these systems requires addressing key barriers such as lack of interoperability between systems, and the need for continuous maintenance to ensure the effectiveness and prevent their counter effect on building performance.

Significance and conclusion: ICT and IoT in buildings offer strong potential as supporting infrastructures for sustainable consumption by enabling significant reductions in energy and resource use. The study highlights the importance of integrating BMS with broader policy and governance frameworks that support sustainable consumption lifestyles, such as Energy Performance Certificates (EPC). Mainstreaming these systems will require overcoming barriers for their interoperability regarding technology and business model. Developing policy packages that encourage system developers following industry standards and the building managers use these systems in both residential and commercial sectors can play role in mainstreaming sustainable consumption in buildings. IoT-based BMS can play a critical role in achieving low-carbon lifestyles, but their deployment must be guided by a comprehensive understanding of their lifecycle environmental impacts and benefits.