How to Read a London Planning Application

Every major development in London – from a single-storey extension to a 40‑storey tower – begins with a planning application. For residents, community groups and urbanism students, knowing how to read these applications is essential for engaging with decisions that shape the city. This guide explains the documents, procedures and policy checks needed to understand a London planning application. Use the official Planning London portal to search across all boroughs, and bookmark your borough’s own planning search page – each council publishes applications with slightly different interfaces.

Find and Identify the Application

Planning applications in London are registered with the relevant borough council. The quickest way to find them is the Planning London portal, though many boroughs also maintain their own search tools – for example, Westminster City Council and Southwark Council. Larger developments that meet the Greater London Authority’s threshold – typically schemes of 150 or more homes or buildings over 30 m – are also referred to City Hall under the Town and Country Planning (Mayor of London) Order 2008. Search for these on the GLA’s planning webpages.

When you locate an application, note the case number (always quote this in correspondence), the site address, the applicant’s name and the validation date. The validation date starts the statutory 8‑ or 13‑week determination period – or 16 weeks for major developments. For example, a scheme of 200 homes in Tower Hamlets had its validation date on 3 March 2025, meaning a decision was due by 23 June 2025.

Understand the Application Type

Not all applications are alike. The type determines the level of detail required and the public consultation process. Below is a breakdown of the most common types you will encounter:

The type is clearly shown on the borough’s application summary page. If the proposal is a major development (10 or more homes, or a building over 1,000 m²), the public notification period is longer – 21 days – and the application may also be advertised in the local press. A common mistake is confusing a lawful development certificate with planning permission; the certificate only confirms legality, not policy compliance.

Read the Key Documents

Once you open the application documents (usually as PDFs), focus on these essential files. Each reveals a different aspect of the proposal and your ability to challenge it:

• Planning Statement – explains the proposal and how it meets local and national planning policies. Check for references to the London Plan and the borough’s Local Plan. If the statement omits key policies (e.g., Policy H1 for housing targets or Policy D3 for inclusive design), note this as a deficiency.
• Design and Access Statement – describes how the building looks, fits the street and is accessible. Look for analysis of surrounding buildings, daylight/sunlight studies and inclusive design measures. A weak daylight study is a frequent reason for refusal.
• Transport Assessment (major applications only) – covers trip generation, parking, public transport capacity, walking and cycling routes. Cross-reference the trip numbers with TfL’s WebCAT to check if the figures are realistic.
• Flood Risk Assessment – required for sites within Flood Zone 2 or 3, or larger schemes. Check whether the proposed floor levels are above the 1‑in‑100‑year flood level plus climate change allowance (typically 0.5 m above the 1‑in‑100‑year level according to the Environment Agency).
• Statement of Community Involvement – shows what public consultation the applicant did before submission. If the local community was not engaged, you can raise this as a material consideration in your comments.

Not every application includes all these documents. Small householder applications may only need a simple form, a location plan and a few drawings. But for any major scheme, the absence of a Transport Assessment or Flood Risk Assessment is a red flag – you can request the council to clarify why it is missing.

Check Relevant Policies

A valid planning decision must be made in accordance with the development plan unless material considerations indicate otherwise. In London, the development plan comprises:

• The London Plan (current version: 2021, with minor revisions) – strategic policies on housing, transport, green space, design and climate resilience.
• The borough’s Local Plan – adopted policies for that area, including site allocations and detailed design codes. You can find each borough’s Local Plan on London Councils or directly on the borough website.
• Supplementary planning documents (SPD) – guidance on specific topics such as tall buildings, shopfronts or residential design.

You can search the London Plan policies by number (e.g. Policy H1 for housing targets, Policy T5 for cycling). Check whether the proposed floor space, height or density falls within the policy limits. If the applicant argues that policy-compliant affordable housing is unviable, they must submit a viability assessment. The Mayor’s Housing SPG outlines the thresholds for affordable housing contributions – typically 35% on public land and 50% on private land for schemes of 10 or more homes.

A practical check: locate the site on the borough’s policies map to see if it falls within a conservation area, a flood zone, or a designated growth corridor. This instantly tells you which policies are most relevant.

How to Submit Comments

You can comment on any live planning application – you do not need to own property nearby. Comments should be written representations, not petitions. Follow these steps:

Use the borough’s online comment form or send an email to the planning officer (contact details are on the application page). For example, the City of London provides a dedicated form.
2. Reference the application number and your address.
3. Focus on material planning considerations: visual impact, traffic safety, local character, density, daylight, policy compliance. Non‑material objections (like loss of a private view or effect on property value) carry less weight.
4. Be specific: “The proposed building exceeds the 45‑degree daylight angle to the neighbouring windows” is stronger than “It will overshadow my house.” Use the BRE guidance on daylight and sunlight as a reference if you need technical language.
5. Stick to the deadline – typically 21 days for major applications, 14 days for minor ones. Late comments may still be considered but are less effective.

If you need inspiration, read past comments on similar applications in your borough – they are public on the planning portal.

What Happens Next

After the consultation period closes, the planning officer prepares a delegated report (for decisions made by officers) or a committee report (for decisions by the planning committee). Both reports are public documents and contain a summary of the proposal, policy analysis, representations received and the officer’s recommendation. You can attend the planning committee meeting to speak (most boroughs allow three minutes per speaker) or watch it online via the council’s live stream – check your borough’s website for the meeting calendar.

The final decision – grant permission, refuse or grant with conditions – is published on the borough website. Conditions may limit hours of operation, require landscaping or secure cycle parking. For major schemes, the decision may include a Section 106 legal agreement covering affordable housing provision, public realm contributions or transport improvements. You can look up the signed Section 106 agreement on the council’s planning portal – it is a legally binding document.

Practical Checks to Make Next

• Set up an email alert on the borough’s planning portal for applications near you. Most portals have a “monitor” or “subscribe” feature.
• Follow the London Planning Committee Network for regular round‑ups of major decisions across the capital (note: this URL is illustrative – verify the correct address).
• If you are preparing to object to a specific application, review the London Plan policies that apply to your borough and the Mayor’s Housing SPG for affordable housing thresholds.
• Download the GLA’s planning application checklist to ensure you have reviewed all required documents.

Reading a planning application takes practice, but the documents are public by law. With a clear checklist and a willingness to check policies, any engaged Londoner can participate meaningfully in the planning process. Start with one application near you – the next committee meeting might be the one where your voice changes the outcome.