Extending a consultation period: when it is worth the delay
An extension of time is a commercial judgement, not a courtesy. What it does to the fee refund, the appeal right and survey validity, and when to decline one.
The decision to extend consultation period planning timetables is usually framed as a courtesy to the council. It is not. Agreeing an extension of time changes your fee refund entitlement, postpones your right to appeal for non-determination, and adds holding costs, so it should be a commercial judgement with a date attached rather than a reflex reply to an officer's email.
The question to ask is simple. Does the extra time buy a decision I can live with, or does it only buy a later refusal?
Why consultees ask for more time
Statutory consultees normally have 21 days to respond, and the common reasons they ask for longer are worth distinguishing, because they point to different answers.
A consultee short of capacity will respond eventually with nothing new. A consultee that has identified a technical gap, a drainage calculation that does not work or a survey carried out in the wrong season, needs time because you have not given them what they need. And a consultee holding an objection pending further information is telling you that the application as submitted will be refused.
The third case is the only one where an extension reliably helps, and even then only if the information gap can be filled. Ask the officer which category you are in, and ask what specifically is outstanding. An officer who cannot answer that is managing a queue rather than an application.
Holding objections from a lead local flood authority, Natural England or the highway authority usually carry a list. Work the list.
Agreeing an extension of time with the council
The statutory periods are eight weeks for most minor applications, 13 weeks for major development and 16 weeks where environmental impact assessment applies. Article 34 of the Development Management Procedure Order 2015 allows a longer period where it is agreed in writing between the applicant and the authority.
Agree in writing, and make it specific:
- A named end date, not "until the outstanding matters are resolved"
- What the council will do in the period, including whether the report will be written and when
- Whether the application is going to committee, and which committee date is being targeted
- What happens if the date passes without a decision
One extension with a clear purpose is reasonable. A chain of rolling extensions is how applications sit for a year, and each one resets the clock on everything below.
Effect on fee refund entitlement
The planning fee regulations provide for a fee refund where an authority fails to determine an application within 26 weeks of validation, and that entitlement can be lost where an extension of time has been agreed. Check the current Fees Regulations before agreeing anything, because the provisions have been amended more than once and the detail matters.
The refund is rarely the main consideration on a major scheme, where the fee is small against the holding cost. On a householder or minor application it can be a material part of the budget, and the trade is worth making consciously. Fee exemptions and the free resubmission right work on their own rules, which we set out in planning fee exemptions and the free go.
Fees are also indexed annually, so a resubmission a year later costs more than the original.
Effect on the non determination appeal right
This is the consequence most often overlooked. An appeal for failure to determine can be made once the statutory period, or any longer period agreed in writing, has expired. Agree an extension and that right moves with it.
That matters where you suspect the council will refuse. A non-determination appeal takes the decision out of the authority's hands, and in some cases the Inspectorate will determine the scheme faster than the council would have, particularly where the issues are narrow and well evidenced.
There is a trade-off in evidence terms. On a non-determination appeal you argue against the council's putative reasons rather than against adopted reasons for refusal, which gives you less to aim at and gives the authority room to develop its case. So it suits applications where the officer's concerns are already clear from the correspondence and where you are confident in the technical evidence.
Holding costs against refusal risk
Put numbers on both sides before replying.
| Cost of waiting | Cost of forcing a decision |
|---|---|
| Finance and option fees running on the site | A refusal on the planning record, visible to the next purchaser |
| Survey data ageing out of validity, particularly ecology | Appeal preparation costs with no fee recovery on success |
| Professional team time spent holding the file open | A longer total timetable where the appeal queue is slow |
| Fee indexation on any resubmission | Loss of the officer relationship on a scheme with several phases |
| Construction cost inflation across the delay | A resubmission fee where the free go has been used |
Ecology is the constraint that most often decides this. A bat emergence survey or a newt presence survey has a limited shelf life, and a delay that pushes the scheme past the next survey season can cost a full year and another commission. Noise and traffic data age in the same way, as our note on budgeting a noise survey and its monitoring period explains.
Where to refuse an extension
Decline, politely and in writing, in these situations.
Where the consultee objection cannot be resolved on the current scheme. Extending time to negotiate something the policy does not permit wastes months and ends in the same refusal.
Where the council has asked for a third extension without having written a report. At that point the extension is managing the authority's performance statistics rather than your application.
Where survey validity will expire during the extension, unless the council will accept the data with a written note.
And where the real purpose is to let an emerging local plan policy gain weight against you. That happens, and it is a legitimate reason to force the decision now.
When you decline, say what you are doing and why, offer to keep working with the officer, and give a short deadline. Many councils determine the application rather than lose it to appeal.
Recording the agreement properly
Do it by email, with the date in the subject line, and ask the officer to confirm. Keep the exchange on the file, because the appeal start date depends on it and the Inspectorate will ask.
Three details worth capturing. The precise new expiry date. Confirmation that the extension relates to the whole application rather than to one consultee. And a note of what the council committed to do, so you have something to point at if the date passes.
Then diarise the date and act on it. An agreed extension that lapses without anyone noticing is the quiet way a scheme loses a year, and nobody sends a reminder.
If the application is also carrying a pre-commencement condition you may not be able to discharge, factor that in before accepting a longer timetable, as set out in the cost of a pre-commencement condition you cannot discharge.
See PlanScope pricing: one free report, £50 per report, or Professional for unlimited reports while an application is being assembled or revised.
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.
Frequently asked questions
How long are the statutory determination periods?
Eight weeks for most minor applications, 13 weeks for major development and 16 weeks where environmental impact assessment applies, running from validation. Article 34 of the Development Management Procedure Order 2015 allows a longer period where it is agreed in writing between the applicant and the authority, which is the mechanism an extension of time uses.
Does agreeing an extension affect my fee refund?
It can. The planning fee regulations provide for a refund where an authority fails to determine within 26 weeks of validation, and that entitlement can be lost where an extension of time has been agreed. Check the current Fees Regulations before replying, because the provisions have been amended and the detail decides the answer.
What happens to my right to appeal for non-determination?
It moves with the extension. An appeal for failure to determine can be made once the statutory period, or any longer period agreed in writing, has expired. Agreeing an extension therefore postpones the date you could take the decision out of the council's hands, which matters most where you expect a refusal.
When should I refuse an extension?
Where the consultee objection cannot be resolved on the current scheme, where a third extension is requested without a report having been written, where survey data will expire during the period, or where the delay would let an emerging policy gain weight against the application. Decline in writing, explain why, and set a short deadline.
How should the extension be recorded?
By email with the new expiry date in the subject line, confirmed by the officer, kept on file. Record the precise date, confirmation that the extension covers the whole application rather than one consultee, and what the council committed to do in the period. The appeal start date depends on this exchange, and the Inspectorate will ask for it.
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.