16th February 2026

The Green Quarter is a 45 hectare brownfield site that lies alongside the Great Western Railway between the Grand Union Canal and the Southall Crossrail station in the London Borough of Ealing. The site was formerly home to the Southall Gasworks which closed in 1973, leaving behind an underutilised and inaccessible site requiring revival.

JTP’s updated plans for the transformation of the old Southall Gasworks site will accommodate 8,100 homes, 18,000 sqm of mixed-use space, a new primary school, and an extensive network of green spaces connecting to the Grand Union Canal and Minet Country Park, creating a truly unique neighbourhood.

A key feature of the enhanced masterplan is the open space framework, which will create a rich, interconnected green environment that prioritises biodiversity and sustainable living. The Green Quarter will set a new standard for urban green living with proposals delivering a 75% biodiversity net gain through the creation of wildflower meadows, grassland and sustainable drainage features, alongside the planting of over 2,500 new trees and the establishment of new copses across the site.

Emmet O’Sullivan, Partner at JTP, said, “The Green Quarter is an exemplary regeneration project in London and it’s a fantastic achievement for the site to be unlocked further with this enhanced masterplan. Working with St George on this ambitious project was about more than housing numbers, it was about shaping a new piece of Southall that feels rooted, inclusive and generous. By putting landscape, movement and community at the heart of the masterplan, JTP has helped create a place designed to thrive over generations and become the new heart of Southall.”