Judicial review costs and the environmental cost cap
Judicial review is the only route to challenge a granted planning permission, and cost exposure decides most cases before the law does. Here is how the Aarhus cap works, what it leaves exposed and what to try first.
Judicial review is the only way to challenge a planning permission once it has been granted, and for most objectors the deciding factor is not the strength of the legal argument but the exposure to the other side's costs. In environmental cases that exposure is capped. The Civil Procedure Rules set a limit on what an individual claimant can be ordered to pay the defendant in an Aarhus Convention claim, currently £5,000 for an individual and £10,000 for anyone else, with the defendant's recovery from the claimant limited in return.
Those caps are not automatic and they are not the whole cost. Understanding what sits inside and outside them is the difference between a considered decision and an expensive surprise.
When judicial review is the only route
There is no third-party right of appeal in England. A neighbour, a parish council or a campaign group that objects to a planning application and loses cannot appeal the grant of permission. Only the applicant can appeal, and only against a refusal or against conditions.
So the routes available after a permission is granted are narrow. Judicial review in the Planning Court challenges the lawfulness of the council's decision, not its planning merits. The grounds are legal ones: the council acted outside its powers, failed to take into account something it was required to consider, misinterpreted policy, gave inadequate reasons where reasons were required, or followed an unfair procedure.
A claim that the council reached the wrong planning judgement will fail. Judges say so repeatedly, in almost those words. The court will not substitute its own view of whether a development is acceptable.
The time limit is short. A claim for judicial review of a decision under the planning Acts must be filed promptly and in any event within six weeks of the grounds arising, which in practice means six weeks from the grant of permission. Six weeks includes the time needed to find a solicitor, obtain the committee report and officer file, send a pre-action protocol letter and receive a reply.
The cost cap in environmental claims
Claims that fall within the scope of the Aarhus Convention attract cost protection under the Civil Procedure Rules. Planning challenges concerning the environment normally qualify, and challenges to development that affects air, water, land, biodiversity or landscape almost always do.
The cap works in two directions. The claimant's liability to pay the defendant's costs is limited, and the defendant's ability to recover more than that is removed unless the court varies the cap. There is a corresponding limit on what the claimant can recover from the defendant if the claim succeeds.
To claim the cap, the claimant states in the claim form that the claim is an Aarhus Convention claim and files a schedule of financial resources. The defendant can dispute that the claim qualifies. The court can vary the cap either way, but only where doing so would not make the proceedings prohibitively expensive for the claimant, and the burden sits with the party asking for the variation.
The figures are set in the rules and have been reviewed from time to time, so check the current version of the relevant Civil Procedure Rule before relying on any number.
What the cap covers and what it leaves exposed
The cap limits liability for the other side's costs. It does not limit your own.
Outside the cap sit your solicitor's fees, counsel's fees for drafting the claim and appearing, expert evidence where any is needed, and the court fees for issuing the claim, for renewing an application for permission at an oral hearing, and for the substantive hearing. Court fees are revised periodically, so take the current figures from the published fee schedule rather than from an old note.
Two further points that catch people out. Where more than one defendant or interested party is involved, typically the council and the developer, the courts normally allow only one set of costs to be recovered against an unsuccessful claimant, so a second full set is unusual but not impossible. And an unincorporated campaign group has no separate legal personality, meaning individual members can be named and can carry personal liability, which is one reason many groups incorporate before filing.
A conditional fee arrangement, crowdfunding, or an after-the-event insurance policy can each change the risk profile. None of them removes the need to understand the cap first.
Permission stage and the risk at each step
Judicial review has a filter. A claim needs permission from the court to proceed, decided on the papers in the first instance.
- Pre-action protocol letter to the council, giving it the chance to respond before proceedings.
- Claim form, statement of facts and grounds, and supporting documents filed within the time limit, with the Aarhus declaration and schedule of financial resources.
- Acknowledgment of service and summary grounds of resistance from the council, usually within 21 days.
- Permission decision on the papers. If permission is refused, the claimant may request reconsideration at an oral hearing.
- If permission is granted, detailed grounds, evidence and a substantive hearing.
The cost exposure grows at each step, and a refusal of permission on the papers is where many claims sensibly stop. The council can normally recover the costs of preparing its acknowledgment of service even where permission is refused, so an unsuccessful claim that ends at the paper stage still carries a bill.
Statutory challenges to plans and decisions
Not every challenge is a judicial review. Where the decision was made by a planning inspector or the Secretary of State on appeal or after a call-in, the route is a statutory challenge under section 288 of the Town and Country Planning Act 1990, filed within six weeks of the decision and requiring the permission of the court.
Where the target is an adopted local plan or another development plan document, the route is section 113 of the Planning and Compulsory Purchase Act 2004, again with a six-week window running from the date of adoption.
The grounds in both are essentially the same public law grounds, and Aarhus cost protection is available on the same basis. The difference is procedural, and filing the wrong type of claim wastes the six weeks you have.
Alternatives worth exhausting first
Litigation is slow, uncertain and unpleasant, and several other routes are worth working through before a claim is filed.
Before a decision, ask the council to defer the application to a future committee where a material point has been missed, ask a ward councillor to call the application in to committee where the local scheme of delegation allows it, and where the proposal raises issues of more than local importance, ask the Secretary of State to consider calling it in.
After a decision, a complaint to the Local Government and Social Care Ombudsman can address maladministration in how the council handled the application, though the Ombudsman cannot quash a permission. Where the concern is that the approved scheme is not what is being built, that is an enforcement matter for the council rather than a court case.
And where the underlying worry is that the technical evidence supporting an application was thin, the more productive response is often to engage with the evidence itself at the application stage. Comments on a drainage strategy, an ecology survey or a transport assessment carry weight with a case officer while the application is live, and almost none once permission has been granted. The report types published on PlanScope show what each of those documents is meant to contain, and the pricing page sets out what it costs to draft one, which is a useful comparison against the cost of any court claim.
Six weeks is not long. If a challenge is seriously in prospect, take advice on the merits within days of the decision notice rather than weeks. Start from your postcode if you need to understand what the application should have included in the first place.
This is general guidance, not legal advice. Anyone considering a court challenge should take advice from a solicitor experienced in planning litigation before acting. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Can a neighbour appeal against a planning permission?
No. England has no third-party right of appeal, so only the applicant can appeal, and only against a refusal or against conditions. Once permission has been granted, the only route for an objector is a claim for judicial review in the Planning Court, challenging the lawfulness of the decision rather than its planning merits.
How long do I have to bring a claim?
A claim for judicial review of a decision under the planning Acts must be filed promptly and in any event within six weeks of the grounds arising. Statutory challenges to an inspector's decision under section 288, and to an adopted plan under section 113, run on the same six-week window. That period has to cover taking advice and the pre-action letter.
What does the Aarhus cost cap actually cap?
It limits what a claimant can be ordered to pay towards the other side's costs in a qualifying environmental claim, and limits in return what the claimant can recover if successful. It does not cap your own solicitor and counsel fees, expert evidence or court fees. The figures sit in the Civil Procedure Rules and can be varied by the court.
Do I have to pay costs if permission to bring the claim is refused?
Usually some. A defendant council can normally recover the costs of preparing its acknowledgment of service and summary grounds of resistance even where permission is refused on the papers. That is why the paper permission stage is where many claims sensibly stop, and why the pre-action correspondence is worth taking seriously.
What can I do instead of going to court?
Before a decision, ask for the application to go to committee, ask a ward councillor to use any call-in power in the scheme of delegation, or ask the Secretary of State to call it in where the issues go beyond local importance. Afterwards, the Ombudsman can look at maladministration but cannot quash a permission, and departures from approved plans are an enforcement matter.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.