Two new stations are being built at Nine Elms and Battersea Power Station.
The joint venture Ferrovial Agroman Laing O'Rouke is designing and building the NLE.
Main tunnelling finished in November 2017 after two tunnels were created between Battersea and new shafts at Kennington Green and Kennington Park.
Documents related to the project, including those in support of our Transport & Works Act Order (TWAO) application, noise monitoring reports and all but the most recent community communications, are on the Northern line extension page in Publications & reports.
The NLE will improve transport links and public spaces in the Vauxhall, Nine Elms and Battersea area, a designated regeneration area on the South Bank.
Up to 25,000 jobs and 20,000 new homes could be created. Journey times from Nine Elms or Battersea to the West End or the City will, in some cases, be less than 15 minutes.
An independent report on the economic impact of the NLE has shown it could generate substantial benefits to the area.
The extension is supported by the Mayor of London and Wandsworth, Lambeth and Southwark councils.
As part of the project we're building two new head houses and shafts at Kennington Green and Kennington Park. These will provide ventilation and emergency access to the Tube once the extension is open.
We have sent Southwark Council our proposal for monitoring passenger movements at Kennington Tube station. This analysis will be used to compare forecast and actual passenger numbers, get insight into people's movements through the station and to ensure our customers' safety.
This protocol is required by Southwark as part of our approval to build and operate the Northern line extension. You can comment on the method we propose on Southwark's planning application portal.
We are committed to engaging with the communities and stakeholders that may be affected by the NLE.
Four CLGs meet quarterly - although these public meetings are currently suspended.
The meetings consider local issues specific to work sites and tunnelling along the route:
They are chaired by councillors and held in public. Residents are welcome to attend as observers.
The NLE works will cause some ground movement which may affect some properties close to the work sites and above the running tunnel routes. Properties in these areas are shown within the blue line on the drawing below.
All residents affected have been contacted for a defects survey.