London’s local authorities have taken another step toward greener housebuilding with the publication of a new low-carbon homes guide designed to help planners tackle emissions embedded in
construction.
Released by London Councils in collaboration with Enfield Council, Royal Borough of Kensington and Chelsea and Westminster City Council, the guidance aims to support borough planning teams in reducing “embodied carbon” — the emissions generated by building materials and construction processes before a home is even occupied.
Embodied carbon is an increasingly urgent issue in the UK’s drive to reach net zero. Industry estimates suggest it can account for up to half of a new home’s total lifetime carbon footprint, putting pressure on policymakers to address not just how homes are heated and powered, but how they are built.
With London expected to deliver tens of thousands of new homes over the next decade, the guide outlines how climate-conscious construction can be integrated into large-scale development. It highlights practical measures such as prioritising low-carbon materials like timber and stone, designing buildings that use fewer resources overall, and adopting modern construction techniques that reduce waste and improve efficiency.
The document also brings together case studies from across the capital and wider UK, showcasing projects that have successfully reduced construction emissions. In addition, it reviews existing tools and benchmarks available to planners and developers, and sets out clear actions that councils can take within current planning rules.
While the guide provides a common framework, it emphasises that individual boroughs retain flexibility to tailor approaches based on local priorities, housing needs, and market conditions.
Wider context: UK low-carbon housing policy
The publication comes amid growing national focus on decarbonising the built environment. The UK government has introduced several initiatives to support low-carbon housing, including the Future Homes Standard, expected to ensure that new homes built from 2025 produce significantly lower operational emissions compared to current standards.
However, critics and industry experts have increasingly pointed out that operational efficiency alone is not enough. Policies are now evolving to address whole-life carbon, which includes embodied emissions — an area where local authorities like those in London are beginning to take a leading role.
Planning policies across many London boroughs already require developers to submit Whole Life Carbon Assessments, aligning with guidance from bodies such as the Greater London Authority. These assessments measure emissions from material extraction through to construction, use, and eventual demolition.
There is also growing support for circular economy principles in construction, encouraging reuse of materials, retrofitting existing buildings instead of demolition, and designing homes for longer lifespans.
A shift in how homes are built
The new guide reflects a broader shift in the UK housing sector: from focusing purely on energy efficiency to addressing the full environmental impact of buildings.
As local authorities balance the need for rapid housing delivery with climate commitments, tools like this are likely to play a key role in shaping how the next generation of homes is designed and constructed.
For London, where both housing demand and climate targets are among the most ambitious in the country, the challenge will be turning guidance into widespread practice.