Appealing part of a scheme and why permissions rarely sever

You cannot appeal part of a refusal. A section 78 appeal is against the decision on the application, and the application is the whole of the development described in the description of development. So when a council refuses a scheme because of one dormer, one access arrangement or one unit in a terrace of five, a partial planning appeal is not a thing you can lodge. What you can do is change what the inspector is being asked to determine, and there are three ways of doing that, each with a different risk profile.

The distinction matters most to architects who have drawn a scheme where nine tenths of it was never in dispute.

Whether a permission can be severed

The starting position in English planning law is that a planning permission is a single thing. It authorises the development described, and it is implemented or it is not. Courts have been reluctant to treat permissions as severable, because severing one creates uncertainty about what was actually authorised and about which conditions attach to what.

There are exceptions where the development comprises physically and functionally independent parts, and a decision notice has occasionally been read as granting permission for one of them. Do not plan around that. Designing a submission on the assumption that a court would later find your permission severable is a poor use of a client's money.

The safer reading is this: if you might want to build one element without the other, they should have been separate applications.

Appealing one refusal among several applications

The cleanest route is to have made the splits at the start. Two applications produce two decisions, and each carries its own appeal right, its own six month window and its own fee.

It is not free. Separate applications mean separate validation, separate consultation and, for householder work, two sets of fees. There is also a real risk that the council assesses each in isolation and then objects to the cumulative effect of both, which is an argument you have handed them by splitting.

Judgement call: split where the elements are physically separate and serve different purposes. A rear extension and a detached garden studio are separable. A rear extension and the rooflights in its roof are not.

Where the elements are separate and one application is refused, the appeal proceeds on that refusal alone. Read the decision notice carefully first, because the reasons tell you whether the objection is to the element or to the whole, as explained in reading reasons for refusal before you decide to appeal.

Amending plans to remove the disputed element

The most common route in practice is to appeal the refusal and submit amended plans with the appeal that delete the offending part.

The inspector will accept amendments only where doing so does not prejudice anyone. That is the Wheatcroft test, which asks whether the development has been so changed that granting permission would deprive those who should have been consulted of the chance to comment. Removing something is usually easier to accept than adding something, because the amended scheme is a subset of what was already advertised.

Two practical points. Submit the amendments with the appeal, not three weeks before the site visit, because a late amendment invites the council to ask for re-consultation and the appeal to be delayed. And explain in the statement of case why the change is within Wheatcroft, rather than leaving the inspector to work it out.

The Planning Inspectorate can and does refuse to consider amended plans. If that happens you are back to defending the scheme as refused.

Risks of narrowing the appeal

Narrowing feels safe. It often is not.

Deleting the element removes it from the permission you might win, and a later application to add it back starts from scratch with the council's refusal reason now on the planning history. You have also, by deleting it, accepted in substance that the council was right. That colours the next application.

There is a fallback point too. If the deleted element was permitted development, say so expressly in the appeal statement, because a fallback that is real and likely to be implemented carries weight in the balance. If it was not permitted development, deleting it has simply reduced the scheme.

And costs. A partial win does not produce a costs award. Costs at appeal turn on unreasonable behaviour, not on outcome, so an inspector who allows a slimmed-down scheme will not award costs merely because you gave up the disputed part.

The inspector's power to determine the application afresh

On a section 78 appeal the inspector deals with the application as if it had been made in the first instance. That includes the power to grant permission subject to conditions, and conditions can do a good deal of the work people imagine severance would do.

A condition can exclude an element from the approved drawings, require its omission before occupation, or require details of it to be submitted and approved before it is built. Where the objection is to the design of a single feature rather than its principle, offering a condition requiring revised details is often more attractive to an inspector than deleting the feature entirely.

Draft the condition yourself and put it in the appeal statement. Inspectors rarely invent conditions that nobody has proposed, and a badly drafted council condition is harder to argue away than a well drafted one of your own. The same discipline applies to the council's own material, which is worth reviewing early, as set out in the appeal questionnaire and the council's statement.

Sequencing applications so this does not happen again

If a scheme has one element you know is contentious, there are three sequences worth considering.

1. Apply for the uncontentious scheme first, secure it, then apply separately for the contentious element with the consented scheme as the baseline.
2. Apply for everything together, expect a refusal on the one element, and use a section 73 application afterwards to vary the condition that controls it.
3. Use pre-application advice specifically on the contentious element before drawing anything, and price the advice against the cost of an appeal.

The first sequence is the one I would normally recommend for a householder or a small site. It gets the client a buildable permission, and the contentious element then gets argued on its own merits against a site that already has consent.

Illustrative example: a two storey side extension with a front dormer is refused solely on the dormer. Appealing with amended plans deleting the dormer is likely to succeed on the extension, but the client loses the loft room. Applying separately for the extension, building it, and then applying for a rear dormer instead may deliver both, at the cost of a second fee and several months.

A well argued Planning Statement at the original application, dealing squarely with the element you know is difficult, costs less than either. Set out the policy test, the local precedent you can evidence from the public register, and the mitigation, rather than hoping the officer does not notice.

Where the policy background shifts while an appeal is running, the position changes again, which is covered in when national policy changes during your appeal.

Enter your postcode on PlanScope to see which supporting documents a resubmission or appeal scheme is likely to need.

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.