London Development Database

The London Development Database (LDD) is a collaborative project between the Mayor and the London boroughs to monitor planning permissions, starts and completions across London. It has been running since 2004.

What does the LDD monitor?

The LDD contains details of all planning consents meeting criteria agreed with the London boroughs, who are responsible for submitting data to the database.

The criteria are:

  • any new build residential units
  • any loss or gain of residential units through change of use or conversion of existing dwellings
  • creation of seven or more new bedrooms for use as either a hotel, a hostel, student housing or for residential care through new build or change of use
  • 1,000m2 or more of floor space changing from one use class to another or created through new build or extension for any other use
  • the loss or gain or change of use of open space

Only planning consents are recorded on the database. For details of applications being considered by your local planning authority, or for refusals, you must visit the relevant planning authority’s website.

How often is it updated?

The data is updated on an ongoing basis as it is checked and re-evaluated, with errors corrected and missing permissions added when they are identified. Otherwise, boroughs update the database in line with data submission deadlines:


What is updated?


Data updates and corrections


All relevant permissions are expected to be added within three months of the end of the month in which they were granted. This means that all permissions granted in March must be on LDD by the end of June

Annually by 31 August

Scheme start and completion dates are checked and updated annually within five months of the end of the financial year. This means that information up to the end of March must be on the LDD by the end of August

Mapping LDD data

We are always looking for new ways to share and visualise this complex dataset. View our interactive webmaps to see recent and upcoming development across London.

Search by address on the planning permissions in my area webmap for live and recently completed permissions in your area. You can also filter your search by development type and/or project status.

The LDD webmap shows recently granted, started and completed planning permissions within a selected radius from the location you enter. Additionally, you can use the ‘aggregated’ view to display housing totals at both borough and LSOA levels.

Launched recently, the accessible and specialist older persons housing locator is a search and map tool fed by LDD data, that allows Londoners to find homes that meet their needs.

Accessing LDD data

An extract of LDD data containing all permissions currently recorded as 'not started' or 'under construction' and all completions since 1 April 2006 can be downloaded from the London Datastore. Additional data sets can be added to the Datastore upon request.

The LDD is a vital component of the evidence base that supports the London Plan, and is the primary source for the London Plan Annual Monitoring Report, produced annually. The report provides detailed analysis of LDD (and other) datasets in the context of London Plan KPI targets.

About this data

The data on the LDD is supplied by the relevant planning authority. They are responsible for the quality and completeness of the data. The planning authorities are the definitive source of information on planning applications within their boundaries - view links to their planning application searches.

LDD Automation Project

Officially launched in late 2018, the LDD Automation Project will revolutionise LDD - streamlining how planning application data travels from applicants, through London’s 35 local planning authorities (LPAs), to City Hall, and out to the public. The initiative is in response to research showing the challenges Local Planning Authorities face when it comes to monitoring.

The ambition is to create a ‘live hub’ of planning and development information, accessible to all Londoners by reforming the information we collect and the way we collect it. We will request the data we need for monitoring up front, on the initial planning application. This data will pass seamlessly into authorities’ improved back-office systems, where planners will verify it, and then automatically out of those systems to City Hall and onto a public website.

The goal is to implement this by 2020 - you can keep up to date with the rapidly progressing project here.

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