Planning appeals: Expert tips for appealing against your planning refusal [April 2026 update]

Receiving a planning refusal can be a serious blow. But if you have good reason to believe your application was not treated fairly, you have every right to appeal. 

On 1 April 2026, the planning appeal system in England changed fundamentally. The old safety net that allowed applicants to backfill weak submissions with new evidence at appeal has been dismantled. In its place is a streamlined, one-shot regime built around a single principle: submit once, submit right.

Whether your planning application has been refused for an extension, a conversion or a new build development, what follows is fundamental to understanding how planning appeals really work in the post-April 2026 landscape. 

We will walk you through the new rules, the practical steps you need to take, the deadlines you must meet, and the strategic thinking that separates successful appellants from those who waste time and money on appeals they were never going to win.

After all the excitement of having planned your dream project, it can feel truly demoralising to have your planning application turned down. After investing time, effort and money on submitting your application, the refusal can be crushing and make you question whether you even want to continue.

Many applicants find the whole process of securing planning permission daunting. Understandably so, when one looks at the level of information and effort required to get consent to build. Concerns about the work involved are natural, particularly if your knowledge of the planning system is limited.

A rejection does not mean the end of a project. It is, more often than not, an opportunity. Many applicants give up after a refusal. The successful developers do not. They take on the challenge and find a way through.

You essentially have two options.

The first is to submit a revised planning application by negotiating amendments with the council and arriving at a design that both you and the officers are satisfied with. 

The second is to appeal against the decision of your planning application.

Whichever route you choose, the clock is ticking from the moment the decision notice is issued. The appeal time limits are strict and non-negotiable.

If the Planning Inspectorate does not receive your appeal and supporting documents within the time limit, the appeal will not be accepted.

The Planning Inspectorate is an executive agency of the Ministry of Housing, Communities and Local Government, employing around 950 staff. Its role is to decide a wide range of planning and land use matters, while also providing advice and recommendations. In doing so, it is expected to act fairly, openly and efficiently.

Most people encounter the Planning Inspectorate through the appeals process. It reviews decisions made by local councils and, where justified, can overturn them. But its role goes further than that. It also examines local plans and deals with nationally significant infrastructure projects.

There is another important point here. In some cases, the Secretary of State can recover an appeal for their own decision rather than leaving it to an Inspector. This usually happens where a case is particularly large, sensitive or politically significant.

From 1 April 2026, the planning appeal system changed in a fundamental way. The Town and Country Planning (Appeals) (Written Representations Procedure) (England) (Amendment) Regulations 2026 introduced the most significant procedural reform in many years.

In practical terms, the new planning appeal system means that, in almost all planning appeals, the Inspector will decide the case based only on the evidence submitted with the original planning application. In most cases, you do not get a second chance to strengthen the file later.

This is because the Part 1 expedited written representations procedure has been widened to cover almost all appeals made under section 78(1) of the Town and Country Planning Act 1990. Under this route, the appellant cannot submit a Statement of Case, cannot introduce new technical evidence, and interested parties cannot make further representations once the appeal has started.

So what does the Inspector actually look at?

In practice, the decision will be based on the original application documents, the council’s decision notice, the officer’s report, the committee minutes, the local planning authority’s questionnaire, and the appeal form itself.

There is another important change too. Under the Town and Country Planning (Consultation) (England) Direction 2026, which takes effect from 11 May 2026, local planning authorities must consult the Secretary of State before refusing any application for 150 or more homes. They must then wait 21 days after giving notice before issuing the refusal.

The Part 1 procedure now applies to the following types of appeal, provided the underlying application was submitted on or after 1 April 2026:

Not every appeal is caught by the expedited route. The following types of appeal continue to follow the Part 2 standard written representations procedure, which still requires a full Statement of Case and allows for further representations at the five-week stage:

This distinction is critical. If your application was refused, you are almost certainly heading into the Part 1 procedure.

If your council simply failed to make a decision in time, you retain the right to submit a full Statement of Case under Part 2. For stalled applications, a non-determination appeal therefore remains a tactical option to access the slightly more flexible Part 2 route. 

The 2026 reforms are built around one hard-edged principle: your original planning application now needs to be complete from the outset. In effect, it must be treated as the finished case, not a first draft that can be improved later.

That changes everything.

If your heritage assessment is weak, your ecology survey is missing, your flood risk evidence is incomplete, or your affordable housing case is not properly costed, those gaps will usually stay with you. In most cases, they cannot be repaired at appeal. The reality is simple: the door closes at the point of submission.

This is why technical evidence now carries far more weight at the application stage. Heritage reports, bat and ecology surveys, drainage strategies, affordable housing statements and transport assessments are no longer documents that can be refined later through conditions or post-refusal arguments. They are now central to the strength of the case from day one.

And that is the real shift.

A minimalist submission is no longer just risky. It is often a strategic dead end. If matters such as viability, delivery or infrastructure are not properly evidenced in the original file, the Inspector will usually be unable to take later material into account. That can close off entire lines of argument before the appeal has even begun.

The same applies to seasonal surveys. If, for example, a required protected species survey has not been carried out within the right survey window, that is no longer a minor weakness that can be fixed later. It may become a fatal flaw. Once the application is in, the opportunity to correct that omission may already have passed.

There is another important point here. If your proposal requires a Section 106 agreement or unilateral undertaking, a completed, signed and dated version must be submitted at the point the appeal is lodged.

Under the Part 1 procedure, there is no later stage for negotiating or finalising legal obligations. So, if the planning obligation is still unsigned or incomplete when the appeal is submitted, that can be enough to undermine the case. The old habit of sorting out legal agreements during the appeal process is no longer something applicants should rely on.

For hearings and inquiries, the position is slightly different. In those cases, a final draft agreed by all parties must reach the Planning Inspectorate no later than 10 working days before the hearing or inquiry opens.

Under the new system, the scope for adding new evidence at appeal is extremely limited. In most cases, the Inspector will only accept it where something material has genuinely changed since the local planning authority issued its decision.

That usually means one of the following:

If the Planning Inspectorate accepts that there has been a material change in circumstances, it may either keep the appeal within Part 1 and request limited further information, or move the case into the Part 2 procedure. That decision rests entirely with the Planning Inspectorate.

So what does this mean in practice?

If you believe a fresh technical report or revised survey would deal with the council's reasons for refusal, an appeal is often not the right route. A revised planning application is usually the more sensible path.

That has real consequences, particularly if you are a smaller developer. If your scheme is refused because key evidence is missing, there is now no realistic way to repair that at appeal. A fresh planning application becomes the only viable route, bringing a second round of fees, consultant costs, holding costs and lost time with it.

For SME developers operating on tight margins, that can be commercially serious and, in some cases, enough to make an otherwise workable scheme unviable. That sits uneasily with the Government’s wider ambition to support smaller builders and boost housing delivery.

There is another major shift under the Part 1 procedure. Interested parties, including neighbours, are no longer allowed to submit further comments once the appeal has started. The Inspector will only consider the representations made during the original planning application.

On one level, this helps by preventing late objections from disrupting the appeal. But it also raises the stakes at application stage. Every concern raised through consultation needs to be addressed properly before the council makes its decision, because once the appeal is lodged, the record is effectively closed.

That is why your original Design and Access Statement, planning statement and supporting documents need to do more than simply describe the proposal. They need to anticipate the likely objections and deal with them clearly and convincingly from the outset.

For Part 2 appeals, and for hearings and inquiries, the position is different. In those cases, interested parties still have the right to make further representations within five weeks of the appeal start date.

Before you press submit on any planning application, carry out a detailed audit of the whole package.

Here is the question to ask yourself: if the council refused this tomorrow on a technical point, could I still win at appeal using only the material already submitted?

That is the real test.

If the answer is no, the application is not yet ready. At that point, you are no longer following a strategy. You are taking a risk.

In the post-April 2026 system, an appeal-ready application should satisfy every one of the following points before submission:

One of the less obvious risks in the 2026 appeal system is the local planning authority’s role as the gatekeeper of the evidence. Under the Part 1 procedure, the Inspector does not build the case from scratch. They rely on the file the council sends across.

That matters more than many applicants realise.

Within one week of the appeal start date, the council must send the Planning Inspectorate its completed questionnaire together with the documents submitted during the application process. Its own case will usually consist of the committee minutes, the officer’s report and the decision notice.

But here is the problem. If the council fails to include a document that you submitted at application stage, the Inspector may never see it. That means applicants now need to be far more careful about checking that the council’s record is complete and accurate.

This is why the document lists submitted with the appeal matter so much. When lodging the appeal, you must provide a list of all documents submitted with the original application, as well as a list of any further documents submitted during the course of the application. That is your safeguard, so it needs to be prepared with real care.

Under the Part 1 expedited procedure, there is no opportunity for the appellant to submit a full Statement of Case or introduce new technical material later.

So, when you or your architects and planning consultants lodge the appeal, the submission needs to be right from the outset. It should include the following:

On the appeal form, you will have a chance to explain why you disagree with the local planning authority’s decision. But this part of the process needs to be approached carefully.

It is not an opportunity to introduce new evidence or build an entirely new case.

Instead, your response should deal directly with the reasons for refusal and point the Inspector back to the material already submitted with the application. The aim is to show, clearly and concisely, why the council’s decision was wrong on the basis of the existing evidence.

That distinction is important. If you try to introduce new material at this stage, the Inspector may simply disregard it.

Planning appeals can be dealt with in three main ways: through written representations, a hearing, or a public inquiry. You may say which route you think is most suitable, but the final decision rests with the Planning Inspectorate.

Here is how each one works.

For most appeals submitted on or after 1 April 2026, the written route will follow the Part 1 expedited procedure. This is now the standard route for most section 78 appeals.

Under Part 1, there is no opportunity for either side to submit a full Statement of Case or add further written material later on. Instead, within one week of the appeal start date, the local planning authority sends the Planning Inspectorate its completed questionnaire together with your original application documents, the committee minutes and the officer’s report. The Inspector will usually carry out an unaccompanied site visit and then issue a decision.

Some appeals, however, still follow the Part 2 procedure. These include non-determination appeals, listed building consent appeals and discontinuance notice appeals.

Under Part 2, the process is more involved. The appellant submits a full Statement of Case with the appeal. The local planning authority must send its questionnaire within one week. Interested parties then have five weeks to make representations. The council may also submit its own full Statement of Case at that stage. Final comments can then be made at the seven-week point, although no new evidence is allowed.

A hearing is a more structured form of appeal led by the Inspector. It is less formal than an inquiry, but more involved than a written appeal.

There is an important difference here. Unlike the Part 1 written procedure, a hearing requires the appellant to submit a full Statement of Case and a draft Statement of Common Ground with the appeal. The local planning authority must then provide its own full Statement of Case, together with the agreed Statement of Common Ground, within five weeks of the start date.

Hearings are usually arranged around 10 to 14 weeks from the appeal start date. So, both sides need to be fully prepared from the outset.

A public inquiry is the most formal appeal procedure. This is usually reserved for more complex, contentious or high-stakes cases. Both sides present their case in full, and witnesses may be cross-examined.

There is also an extra procedural step. If you want your appeal to proceed by way of inquiry, you must notify both the Planning Inspectorate and the local planning authority of your intention to appeal at least two weeks before the appeal is actually submitted.

Inquiry dates are usually set around 13 to 16 weeks from the start date. A Case Management Conference is normally held after about seven weeks, usually on Microsoft Teams. Proofs of evidence must then be submitted no later than four weeks before the inquiry opens.

Public inquiries are open to the public and to journalists. Proceedings may also be recorded or filmed, provided this does not disrupt the event.

Under the 2026 system, changing a scheme at appeal is now far more difficult. Under the Part 1 procedure, it is effectively off the table. Even in cases that move into Part 2, a hearing or an inquiry, any amendment will face a high threshold.

This is where two important legal principles come in.

The first is the Wheatcroft test. Put simply, the question is whether the proposed change would turn the appeal into a different application. Even a number of smaller changes can fail this test if, taken together, they alter the scheme in a meaningful way.

The second is the Holborn Studios principle. This is about fairness. The question here is whether allowing the amendment would be procedurally unfair, especially if other interested parties would have lost the chance to comment properly on the revised scheme.

And that is the key point.

The appeal process is not meant to be used to redesign or evolve a proposal. If amendments are needed, that is often a sign that a revised planning application may be the better route. Where amendments are proposed at appeal, they need to be identified from the outset, and even then there is no guarantee they will be accepted. The timetable will not usually be paused to allow a fresh round of consultation.

A party can apply for costs during a planning appeal, and in some cases the Inspector may raise the issue without being asked. In broad terms, costs are awarded where one side has behaved unreasonably and that conduct has caused the other side to incur unnecessary expense.

That is the basic test.

Unreasonable behaviour can take different forms. It may include failing to cooperate during the appeal, missing deadlines, not attending a site visit, or relying on information that is inaccurate or misleading. 

In the post-April 2026 system, there is another clear risk too. If a party tries to introduce new evidence at appeal that should have been prepared and submitted with the original planning application, that may also justify a costs award. This is particularly relevant where an application was refused because key information was missing, and that same information is then produced only at appeal stage.

This matters more now because cost awards have become a more serious feature of the appeal system. The Planning Inspectorate may award costs following an application by one of the parties, or on the Inspector’s own initiative. The aim is to discourage wasted time and unnecessary expense, and to bring greater discipline to the process.

There is one important point to keep in mind. A costs decision deals only with whether costs should be awarded in principle. It does not fix the amount. If the parties cannot agree the figure, the matter may then have to be resolved separately, including through the Senior Courts Costs Office.

When choosing architects and planning consultants for a planning appeal, the real question is not who sounds most confident or charges the lowest fee. It is whether the team is intellectually serious, professionally credible and experienced enough to judge the case properly from the outset.

Start with the professional credentials. In the UK, architects must be registered with the Architects Registration Board, which is the legal register that allows someone to use the title “architect”. RIBA chartership is separate. It is not the legal register, but it is a strong mark of professional standards and commitment. 

In practice, you are usually best served by working with ARB-registered and RIBA chartered architects, together with RTPI chartered town planners, or with a practice that brings both disciplines together in one team.

That matters even more now. Under the 2026 reforms, appeals are no longer a process where weak applications can be rescued with clever arguments later. The right team will know how to build an appeal-ready case from day one, with the right evidence, the right technical inputs and the right strategy already in place. 

If they also have experience in winning the most controversial planning applications, that is often a strong sign that they understand how to navigate difficult cases under pressure. Any firm still talking as though problems can simply be sorted out at appeal is working on outdated assumptions.

Price, of course, matters. But it should never be the main test. Cheap planning appeal services are often cheap for a reason, and if weak advice leads to failure, the true cost is far greater than the savings made at the start. 

In the current system, where a failed first attempt may carry a much sharper financial penalty, clients should think in terms of value, judgement and quality rather than headline fee alone. 

For example, established firms with a proven track record of winning the most controversial planning applications and appeals will often charge more, but that usually reflects the depth of expertise, the quality of judgement and the strength of the strategy behind the case. At Urbanist Architecture, our fees for very small projects start from £3,000 and increase depending on the scope, complexity and demands of the project.

It is completely understandable to want certainty when a project has already cost you time, money and emotional energy. But in planning, no honest adviser can guarantee success. Too much depends on matters outside any consultant’s control, including the planning merits of the case, the evidence available, the policy context and the judgement of the decision-maker.

That is why so-called no-win-no-fee offers should be treated with caution. In many cases, these offers come from firms that are still trying to win work, rather than firms with an established client base and a strong track record of success. More often than not, the model is a way of generating instructions, not a sign of genuine confidence or quality.

Even where there is no upfront professional fee, that does not mean the service is genuinely risk-free. If the case fails, other charges may still appear under headings such as administration fees, disbursements or additional services. If the case succeeds, the fees that follow may be far higher than they first appeared.

So the real issue is not whether a firm claims to remove risk altogether. It is whether they are transparent about how they charge, what is included, what is excluded and what you may still have to pay depending on the outcome. In planning appeals, clear advice, proper judgement and honest pricing are worth far more than a sales promise designed to win new business.

Did you know that 97% of our clients have collectively secured planning permission?

At Urbanist Architecture, we have built a strong reputation for winning difficult planning permissions and planning appeals, especially in cases that others may consider too risky, too sensitive or too controversial. 

Our work is not limited to overturning refusals. Very often, our greatest value lies in securing permission at the application stage for schemes that face serious policy, design or political obstacles from the outset.

That matters because the strongest planning outcomes are usually shaped long before an appeal is ever needed. We know how to identify the real planning issues early, frame the right strategy, and build a case that is intellectually serious, evidence-led and carefully aligned with planning policy. In many cases, that is what allows a difficult proposal to succeed in the first place.

Where a refusal does happen, we apply the same disciplined approach at appeal. We examine the council’s reasons closely, test whether they are genuinely supported by policy and evidence, and identify where the decision is inconsistent, exaggerated or simply wrong. We then build a robust case showing why the proposal should be allowed.

In the 2026 system, that approach matters more than ever. Planning appeals are no longer a process where weak submissions can be repaired later with new reports and better arguments. Success now depends on the quality of the original application. That is why we focus on preparing strong, appeal-ready planning applications from day one, while also knowing how to fight the right cases at appeal where necessary.

We are experienced in dealing with a wide range of difficult planning issues, both at application stage and on appeal. In particular, we regularly advise on cases involving:

Since 2013, we have helped homeowners and developers navigate some of the most complex planning cases. As a multidisciplinary team of architects and planning consultants, we know how to identify opportunities, address objections and build strong planning cases, whether at application stage or on appeal.

Below are just a few examples of schemes where we secured planning permission at appeal after an original refusal.

This proposal involved demolishing an existing house and outbuildings and replacing them with a pair of two-storey semi-detached family homes within an Urban Open Space area. Bromley Council refused the application, arguing that the development would increase site coverage, harm the character of the area, reduce the site’s open nature and undermine the function of the Urban Open Space, contrary to Policy 55 of the Bromley Local Plan.

We appealed the decision. The Planning Inspectorate allowed the appeal and granted planning permission, finding that the scheme would make efficient use of the land, that the proposed homes would sit comfortably within the plot, and that their design and bulk would remain in keeping with the character of the area. The Inspector also gave weight to the contribution the scheme would make towards the council’s housing shortfall.

This proposal involved removing the existing shopfront, adding stacked bay windows, creating a front forecourt and constructing a mansard roof extension. Greenwich Council refused the application on the basis of poor amenity space, privacy concerns and undersized floorspace, with reference to the Nationally Described Space Standards and London Plan policies.

We challenged that refusal on appeal. The Planning Inspectorate allowed the scheme, finding that it was an appropriate design response to the building and its context, that it made good use of a corner plot, and that it would not harm the character or appearance of either the building or the wider area.

This scheme proposed an additional storey to create a new two-bedroom self-contained flat. Lewisham Council refused the application, arguing that the extra storey would appear visually intrusive and harm the architectural unity of the group of buildings as well as the surrounding conservation area.

The appeal succeeded. The Inspector found that the mansard-style roof extension had been designed with sufficient care and restraint, that it reflected similar roof forms in the area, and that the character and appearance of the conservation area, along with the setting of a nearby listed building, would be preserved.

This case involved demolishing an existing conservatory and side extension and replacing them with new single-storey rear and side extensions within a conservation area. Greenwich Council refused the application on the grounds that it would fail to preserve or enhance the character and appearance of the Shrewsbury Park Conservation Area.

On appeal, the Planning Inspectorate took a more balanced view. While the Inspector did not find that the proposal would positively enhance the conservation area, they concluded that it would have a neutral effect and would therefore preserve its character and appearance, which was enough to justify allowing the appeal.

Understanding how different councils perform at appeal can be genuinely useful when shaping your strategy. Planning Inspectorate data for 2024/25 shows that section 78 appeal success rates vary sharply across local planning authorities in England. The national average was 29%, but in some council areas the figure was far higher.

That matters, but only up to a point.

A high appeal success rate may suggest that a council is refusing too many schemes or making weaker initial decisions. A lower rate may point to more defensible decision-making, more selective appeals, or both. So, if your application has been refused, a council’s appeal record can help inform the next step, whether that is a revised application or a direct appeal.

The following councils recorded the highest section 78 appeal success rates in the year to 31 March 2025, based on a minimum of 20 appeals decided.

Some of these figures are more revealing than others. Wychavon, for example, combines a high success rate with a high volume of appeals, which makes the pattern harder to dismiss as a statistical quirk. Wiltshire also stands out for the same reason. 

By contrast, very strong percentages in smaller authorities may reflect a more selective pool of appeals rather than a wider systemic issue.

The London picture is especially uneven. Kensington and Chelsea recorded a 43% appeal success rate across 40 appeals, while Harrow saw 42% of its 65 appeals allowed. At the other end of the spectrum, Redbridge allowed just 6% of 31 appeals, while Enfield allowed 11% of 53.

Several outer London boroughs also recorded relatively low overturn rates. Croydon saw 15% of 132 appeals succeed, while Waltham Forest recorded 15% of 61. Hammersmith and Fulham stood at 36% across 36 appeals, and Hounslow at 33% across 60. Barnet, despite handling the highest appeal volume of any London borough at 153 decisions, recorded a 20% success rate.

These figures point to clear differences in how often refusals are later overturned. But they should still be read carefully. Caseload mix, local policy context, officer capacity and the type of schemes being appealed can all affect the outcome.

Green Belt and Grey Belt appeals are also worth watching closely.

An increasing number of Grey Belt appeals are now succeeding, which suggests that some councils are still taking a more restrictive approach than Inspectors are prepared to support, particularly where housing need, site context and Grey Belt arguments have been properly evidenced.

For anyone focused on winning Green Belt appeals, that matters, because it shows how important a well-structured planning case has become in persuading Inspectors to take a more balanced view than the local authority.

But the label does not do the work on its own. These cases are still won or lost on the quality of the planning case: how carefully the site has been assessed, how clearly any policy harm has been addressed, and how convincingly the overall planning balance has been assembled from the outset.

Appeal statistics can be helpful, but they should never be treated as a shortcut. Every appeal still turns on its own facts, its own planning context and the quality of the material before the Inspector.

That point is even more important after the 2026 reforms. Because appeals now depend so heavily on the original application file, the quality of the first submission matters far more than a council’s historic appeal rate. In practice, strategy should be driven first by the strength of the case and the refusal reasons relied upon, and only second by the council’s wider record.

If your appeal is dismissed, the first step is to understand exactly why. Look carefully at the Inspector’s reasoning and compare it with the council’s original refusal. Then speak to your architects and planning consultants about whether the proposal should be revised, restructured or abandoned.

In some cases, the sensible next step is a fresh planning application based on a better version of the scheme. In others, there may be grounds to challenge the decision in the High Court. But strict time limits apply. Permission to bring a High Court challenge must usually be sought within six weeks, beginning on the day after the appeal decision is issued. Any person aggrieved may challenge the decision, but permission from the Court is required first.

There is another practical point to keep in mind. Starting development before that six-week window has expired can carry real risk. If the permission is later quashed by the Court, the development may become unlawful and the local planning authority may take enforcement action.

Where the issue is only a minor administrative mistake on the appeal decision, rather than an error in planning judgement, there may instead be scope to seek a correction under the Slip Rule. Under section 56 of the Planning and Compulsory Purchase Act 2004, the Planning Inspectorate may correct accidental errors or omissions, but it cannot use that power to change the substance of the decision.

So a dismissed appeal may be a setback, but it is not always the end of the road.

f your appeal is allowed, that is a major step forward. But before doing anything else, read the decision notice carefully. Appeal permissions often come with conditions, and those conditions need to be properly understood before the project moves on.

Once you are clear on what has been approved, the scheme can move into the next phase. That will usually involve technical design, RIBA Stage 4, building regulations drawings and, where relevant, tender drawings. In other words, the focus shifts from winning planning permission to making the project technically resolved, compliant and ready for delivery.

Even at that stage, however, the new appeal regime still matters. Appeals involving the refusal or non-determination of condition discharge applications are now also caught by the tighter Part 1 procedure. 

So, when discharging planning conditions, you still need to submit detailed information, technical surveys and supporting documents in a thorough and timely way. The same principle continues to apply: submit once, submit right.

One notable change in the 2026 procedural guidance is the requirement to disclose the use of artificial intelligence. If AI has been used to create or alter any part of your documents, information or data, that must be made clear when the material is submitted to the Planning Inspectorate.

This applies across the board, including Part 1 appeals, Part 2 appeals, hearings and inquiries. So transparency about AI use is no longer just good practice. It is now a formal procedural requirement.

That matters for a wider reason too. AI is becoming more common in design development, drafting and supporting documentation, and it can be useful. However, AI can make planning permission advice feel more reliable and authoritative than it actually is. If you have spent any time using AI tools at all, you will recognise the trap: the tool that was built to be helpful will also be persuasive, and the tool that is persuasive will sometimes feel like an expert even when it is not.

That is precisely why caution matters. In planning appeals, persuasive wording is no substitute for professional judgement, policy understanding or technically reliable evidence. AI may help with process, but it should never be mistaken for expertise.

There is another important change for larger housing schemes, and it sits squarely within the same interventionist mood as London’s housing emergency package. The direction of travel is clear: where major residential development is at stake, government is becoming less willing to leave refusal decisions entirely to local discretion.

From 11 May 2026, under the Town and Country Planning (Consultation) (England) Direction 2026, local planning authorities must consult the Secretary of State before refusing any residential planning application for 150 homes or more, provided it has not already been determined. Once that notice is given, the authority must wait at least 21 days before issuing the refusal.

That is not a minor procedural point. It means that the refusal of large housing schemes now attracts a higher level of scrutiny. The local planning authority must send the Planning Casework Unit the full application file, including the plans, drawings and supporting material, together with the formal notice, all comments and objections received, the officer’s report and the proposed reasons for refusal.

In London, this matters even more. The emergency housing package for London already introduced measures to unblock stalled schemes, including a fast-track route for policy-compliant affordable housing schemes, temporary CIL relief, and expanded powers for the Mayor to review borough refusals for schemes of 50 homes or more.

So for larger London applications, the planning process is no longer just a borough-level exercise. Depending on the scale and politics of the scheme, it may now engage both City Hall and central government.

The practical implication is simple. For schemes at this scale, the quality of the original submission is not just a planning matter. It is also a political and legal one. If the application is weak, those weaknesses will be exposed at a much higher level. If it is strong, it is far better placed to withstand that scrutiny.

The new planning appeal landscape requires a more disciplined and specialist-led approach from the outset. Put simply, reactive submissions and thin application packages are far less likely to survive.

These are the five principles that should now shape every planning application and appeal strategy.

Carry out an internal, Inspector-level review before submission. Use pre-application discussions properly and make sure likely objections have already been identified and addressed.

Heritage, ecology and drainage reports should be appeal-ready on day one. Miss a seasonal survey window, and the consequences may be serious. Affordable housing statements also need to be properly evidenced and costed from the outset.

Where legal obligations are required, they should be drafted early and prepared properly. An unsigned or incomplete obligation can become a serious weakness at appeal.

The original planning statement should be written as though an Inspector may later have to rely on it. That means dealing clearly with likely concerns from officers, committee members and consultees within the submission itself.

Strong applications do not wait to see what objections emerge. They anticipate them. If a committee may depart from an officer recommendation, the submission should already be structured to answer the likely reasons.

And that is the wider lesson. In the 2026 system, poorly reasoned refusals may still be overturned, but only if the original application file is strong enough to expose their weaknesses. If the submission is incomplete, reactive or underprepared, the opportunity may already have been lost. You do not get much room to recover later.