While talk of building on low quality ‘grey belt’ land has been happening for months, the Draft London Plan now suggests building housing on 10 locations deemed high quality green beltKumail Jaffer Local Democracy Reporter covering the Mayor of London and the Greater London Authority
06:30, 04 Sep 2026
London’s Green Belt is needed to solve the housing crisis, City Hall says(Image: Vilma Bharatan)
City Hall has defended its “pragmatic” approach to building new developments on high quality green belt sites across London amid accusations of carving up land that’s long been protected.
The Draft London Plan, which directs development regulations across the capital, claims that construction on brownfield sites alone will not meet the city’s housing needs going forward.
Greater London Authority (GLA) officials have identified 10 broad locations for growth (BLGs) within the green belt where there are good transport links, including in Crews Hill and Chase Park, a proposed new town in Enfield.
Around 56,000 of the 558,000 homes that the Mayor is hoping will be built in London between 2028 and 2037 are located within the green belt. Deputy Mayor for Planning Jules Pipe said City Hall was taking a “pragmatic” approach to meeting the capital’s housing needs.
City Hall officials have identified 10 broad locations for growth (BLGs) within the Green Belt(Image: GLA)
This involves taking advantage of “well located pockets of green belt” to develop them at a “reasonable density” with six-storey developments.
However, he stressed that the Mayor was still focused on a “brownfield first approach”.
“This is after having sweated all other sites,” he told the London Assembly Environment Committee. “Green belt is at the bottom of the chain in terms of where anyone is looking to build. But the reality is, eventually we will run out of brownfield space in the foreseeable future.”
“The reality is, eventually we will run out of brownfield space in the foreseeable future,” Jules Pipe said(Image: London Assembly)
Assembly Members suggested that some of the sites identified as BLGs were high-quality green belt sites rather than inferior land which the government has sought to build on.
However, Mr Pipe said that any so-called ‘grey belt’ sites that may be available in London are “not necessarily well located for housing”, adding: “The approach is driven by transport and accessibility rather than the quality of the land.”
He also confirmed Sir Sadiq Khan would tend to oppose any developments pitched outside of the designated BLGs on green belt land.
Both City Hall and the government have admitted they need to build on the green belt
But he warned: “I don’t want to say there will never be a successful application on grey belt, because there could be a development on a car park that wasn’t included in the BLG next to a Tube station, for example.”
On Wednesday Mr Pipe, appearing in front of the Housing Committee, explained: “Random bits of grey belt and the far-flung bits of London near the M25 are not sustainable in terms of the socio-economic quality of life for those people who would be put in places where there wouldn’t be shops, doctor surgeries, access to hospitals, and so on.
“So again, another reason to choose a well-located place in the green belt that is accessible in terms of public transport.”
The Draft London Plan states that any green belt developments will be “well connected and viably serviced, in turn minimising the amount of land needed”.
It adds: “This will come with improved access to good quality green spaces for Londoners and an increase in biodiversity. The BLGs identified have the greatest potential to meet London’s good growth needs due to existing infrastructure (or opportunity to enhance it).”
The approach was criticised during the same evidence session by campaigners, including John Sadler, Operations Director at CPRE London, who said the Draft London Plan did not have “strong protections” around green spaces and infrastructure.
John Sadler said green spaces were valuable both “socially and environmentally”(Image: London Assembly)
“There’s a great variety of threats to parks and green spaces which are being built over,” he said. “These are valuable, socially and environmentally. This can be forgotten when we talk about the wider green belt. We also need to talk about new parks and green spaces, not just to fight back against what could be lost.
“Some green spaces have been locked up by developers – more could be done to release those sites. More could be done to ensure developers look to build on brownfield first.
“There is some benefit to intensification around transport hubs, but when you start going into green belt, there aren’t the services that are needed to make these places work – they are urban sprawl by another name.”
Looking for more from MyLondon? Subscribe to our daily newsletters here for the latest and greatest updates from across London.