Tilted balance: when the presumption in favour applies

The tilted balance applies when the policies most important for determining an application are out of date, or where there are no relevant development plan policies at all. Where it applies, the National Planning Policy Framework asks the decision maker to grant permission unless Framework policies protecting particular assets give a clear reason for refusing, or the adverse impacts of granting would significantly and demonstrably outweigh the benefits. Most tilted balance planning arguments are won or lost on whether the trigger is engaged, long before anyone weighs a benefit.

Section 38(6) of the Planning and Compulsory Purchase Act 2004 has not gone anywhere. The determination is still made in accordance with the development plan unless material considerations indicate otherwise. The presumption is a material consideration of considerable weight that changes how the decision maker reaches that judgement.

Where the presumption sits in the Framework

The presumption in favour of sustainable development is the golden thread running through the Framework, with one set of limbs for plan-making and another for decision-taking. In the December 2024 edition it was set out at paragraph 11, with sub-paragraphs (c) and (d) doing the work in decision-taking. The Framework re-issued on 17 August 2026 reorganised the document around policy codes rather than paragraph numbers, so quote the current edition by its code and state the edition you are quoting.

That matters more than it sounds. Junior staff routinely copy a paragraph number out of an old statement, and a case officer who holds the current edition will read the citation as careless. Cite the edition, the code and the date of publication every time.

The two decision-taking limbs

The first limb is the ordinary one. Where a proposal accords with an up-to-date development plan, permission should be approved without delay. Nothing is tilted about it.

The second limb is the one people mean when they say tilted balance. It bites where there are no relevant development plan policies, or where the policies most important for determining the application are out of date. The decision maker then grants permission unless one of two things applies: a Framework policy protecting an area or asset of particular importance provides a clear reason for refusing, or the adverse impacts would outweigh the benefits on the demanding test the Framework sets.

The two exceptions are not alternatives to be chosen. They run in sequence. If a protective policy gives a clear reason for refusal, the balance never gets weighed at all.

What makes the most important policies out of date

Age alone does not make a policy out of date. A 2009 housing policy that remains consistent with the Framework can carry full weight, and a 2023 policy inconsistent with it may carry very little. The Supreme Court settled the approach in Suffolk Coastal District Council v Hopkins Homes Ltd [2017] UKSC 37, holding that the shorthand about out-of-date policies is a trigger for the presumption rather than a question about the lawful status of the plan.

Three routes are common in practice:

1. The authority cannot demonstrate the housing land supply the Framework requires, measured against the current national methodology and any buffer that applies.
2. The Housing Delivery Test result falls below the threshold at which the presumption is applied.
3. The relevant policies, read as a basket, conflict with the Framework on the issues that decide the application.

The third route is the one that gets argued badly. The test looks at the policies most important for determining this application, taken together, and asks whether that basket is out of date. A single non-compliant policy in a basket of six will rarely carry the argument. Set out the basket explicitly, policy by policy, and say why each is or is not consistent with current national policy.

The policies that switch the presumption off

The Framework lists the protective policies that can provide a clear reason for refusal. They cover habitats sites and sites designated for nature conservation, Sites of Special Scientific Interest, Green Belt, Local Green Space, National Parks and National Landscapes, irreplaceable habitats including ancient woodland and veteran trees, designated heritage assets, and areas at risk of flooding or coastal change.

Two points get missed. The policy has to provide a clear reason for refusing, which means the harm identified must be the kind the policy is aimed at, and it must be more than trivial. And where the policy applies a balance of its own, such as the heritage tests under the Planning (Listed Buildings and Conservation Areas) Act 1990, that internal balance is carried out first. Only if it comes out against the proposal does the clear reason for refusal exist.

Flood risk is the one to watch on small sites. A sequential test failure can be enough to disapply the presumption entirely, which is why that work belongs at the start of the programme rather than in the week before submission.

How the balance is weighed in practice

Assuming the presumption survives, the exercise is a planning judgement and inspectors say so. Benefits are given the weight the decision maker thinks they deserve, and the adverse impacts have to clear a high bar before they defeat them. Housing delivered where supply is short usually attracts substantial weight. Economic benefits during construction attract modest weight because they are temporary.

An illustrative example helps. Take a 40-dwelling edge-of-settlement scheme in an authority with a shortfall in housing land supply. The basket of most important policies includes a settlement boundary policy that relies on a superseded housing requirement, so it is out of date. The tilted balance is engaged. Landscape harm is moderate and localised, highway impact is neutral after mitigation, and the scheme delivers 12 affordable homes. On those facts an inspector would be looking hard at whether moderate landscape harm can clear the demanding threshold. It usually cannot on its own. That example is illustrative only and every case turns on its evidence.

Where submitted statements go wrong

Four failures recur:

• Asserting that the presumption applies without evidencing the housing land supply position on the date of the decision, rather than the date the statement was written.
• Treating every development plan policy as part of the basket, which makes the argument look opportunistic.
• Running the balance first and treating the protective policies as a factor within it.
• Claiming benefits twice, once as a benefit and again as the absence of a harm.

The fix for the first is administrative. Check the authority's most recent published position statement before submission, note the date, and put the date in the statement. Supply positions move. A statement that relies on a figure from 18 months ago invites the officer to update it against you.

Your planning statement should carry the argument in its own section, with the trigger, the basket, the protective policies and the balance in that order. Case officers write reports in that sequence, and a statement that mirrors their structure is easier for them to adopt.

Checking the trigger on your site

Start with the plan itself, then work outwards. Confirm which documents make up the development plan for the site, including any made neighbourhood plan, then identify the policies that will decide the application. Read the authority's latest housing land supply statement and its Housing Delivery Test result. Check whether any of the protective designations touch the site or its setting.

If the supply position is finely balanced, expect the authority to publish an updated figure between validation and determination. Build that into the programme. And keep the analysis honest, because an inspector who spots an overstated trigger will discount the rest of the case. Windfall allowances are a common battleground in supply disputes, and the way an authority justifies its windfall allowance is worth reading before you accept its figure.

Getting the structure of the argument right is mechanical work that takes time away from the parts requiring judgement. Enter your postcode on PlanScope to see which reports your site is likely to need and to start a draft statement you can edit.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.