City North

Handling third-party approvals from pre-planning to delivery

This landmark development comprises two 23-storey high-rise towers surrounded by lower-rise buildings of up to 13 storeys, all constructed over a new single-level basement. Located adjacent to Finsbury Park Station, the project faced significant engineering and logistical challenges due to its proximity to critical Network Rail assets, including an embankment and two London Underground lines with platform tunnels nearby.

Navigating Complex Rail Interfaces

Walsh was appointed early in the project, preparing the extensive ‘Approval in Principle’ documentation (Form 1) before planning commenced. We successfully addressed 118 comments from Network Rail, securing the necessary approvals and providing confidence to project funders.

The development had a substantial interface with Finsbury Park Station, a key interchange for overground and underground services. Works included the removal of old foot tunnels and an earth embankment, and the creation of a new station entrance and two new foot tunnel portals, all requiring meticulous coordination with Network Rail and TfL.

Innovative Infrastructure Solutions

A major challenge was a significant sewer running through the site. Walsh devised a creative solution to secure build-over consent and a diversion agreement, allowing Thames Water access beneath the site without physical entry, preserving operational continuity and minimising disruption.

MMC & Sustainability 

To accelerate the programme and improve build quality, the project adopted Modern Methods of Construction (MMC). This approach supported efficient delivery while achieving a BREEAM rating of Very Good, reflecting the project’s commitment to sustainability and performance.

Walsh managed all third-party approvals and oversaw the major temporary works and construction sequencing, ensuring smooth delivery in one of London’s most constrained and complex urban environments.