100% of all designed new buildings to be zero carbon

The document titled "100% of all designed new buildings to be zero carbon" is published by the London Energy Transformation Initiative (LETI). This guide aims to provide comprehensive strategies for achieving net zero carbon in new buildings as part of the broader response to the climate emergency.

LETI emphasizes that all new buildings must operate at net zero carbon by 2030 to meet UK climate change targets, as buildings currently account for 49% of annual carbon emissions in the UK. This document outlines a pathway to ensure that new constructions do not contribute further to carbon emissions, reflecting a critical need for the built environment to adapt to the climate crisis.

The concept of whole life carbon includes both operational and embodied carbon. Operational carbon refers to emissions generated during the building's lifetime, while embodied carbon encompasses emissions from material extraction, construction, and eventual disposal. LETI sets ambitious targets for both components, advocating for a comprehensive approach to building design and construction.

The guide suggests that by 2025, 10% of new buildings should already be designed for net zero carbon, scaling up to 100% by 2030. It encourages a collaborative approach involving stakeholders from various sectors, including developers, architects, and policymakers, to create a supportive regulatory environment.

LETI proposes specific EUI targets for various building types, which must be met to ensure energy efficiency. For residential buildings, the EUI target is set at 35 kWh/m²/year, while commercial offices should aim for 55 kWh/m²/year. These targets are designed to promote energy-efficient designs that significantly reduce overall energy consumption.

In line with the circular economy principles, LETI emphasizes the importance of using reused materials and designing buildings for disassembly. This approach not only minimizes waste but also reduces embodied carbon, making it a crucial aspect of sustainable building practices.

The document highlights a significant performance gap between predicted and actual energy consumption in buildings. LETI stresses the importance of closing this gap through improved data collection and monitoring, enabling accurate assessments that inform future designs.

The guide advocates for integrating demand response measures to enhance energy flexibility in buildings. By adopting smart technologies and allowing for real-time adjustments to energy use, buildings can contribute to grid stability while reducing operational costs.

LETI calls for mandatory energy data disclosure for all new buildings to foster transparency in energy consumption and carbon emissions. This initiative aims to create a culture of accountability, enabling better benchmarking and performance evaluation across the sector.

In summary, LETI's guide serves as an essential resource for achieving sustainable housing through net zero carbon buildings. By setting clear targets, advocating for collaborative efforts, and emphasizing the importance of both operational and embodied carbon, the initiative aims to spearhead significant change in the built environment across Europe.