Extension of time against accepting a refusal
Agreeing an extension keeps the case with the officer and usually gives up the fee refund. Letting the period expire buys an appeal you cannot amend. The right answer depends on the officer's position.
Week seven of an eight week application, and the case officer emails asking you to agree an extension of time. The choice looks administrative and is not. Agreeing a planning extension of time keeps the application alive with the officer who will write the report, and it usually gives up your entitlement to a fee refund under the planning guarantee. Refusing it forces a decision, which may be a refusal, and a refusal buys you an appeal against a reasoned decision rather than an appeal against silence.
Both routes are defensible. Which one is right depends on whether the officer is minded to support the scheme, and on what the programme can absorb.
What an extension of time changes
Statutory determination periods are eight weeks for most minor applications, 13 weeks for major development and 16 weeks for applications accompanied by an environmental statement. Those periods run from validation, not from submission, which is where the first week or two usually disappears.
An extension is a written agreement between applicant and authority to a longer period. It has three effects worth knowing. The authority can determine the application after the original period without the applicant appealing on non-determination. The applicant cannot appeal for non-determination during the extended period. And the planning guarantee, under which the fee is refunded where an application is not determined within 26 weeks, does not operate in the same way once a longer period has been agreed, so check the current guidance before agreeing anything on a large application where the fee is substantial.
None of that matters much on a householder application with a modest fee. On a major application it can be a meaningful sum.
The appeal right against non-determination
Once the determination period expires without a decision, and without an agreed extension, there is a right of appeal to the Planning Inspectorate on the ground that the authority has failed to determine the application. The time limits for lodging an appeal are set nationally and differ between householder and other applications, so check the current deadline rather than assuming six months.
Two consequences of using it. The authority loses the ability to determine the application, so any negotiation in progress stops. And the Inspector decides the scheme as submitted, with the authority setting out the reasons it would have refused. There is no opportunity to amend in the way you might after a refusal.
That makes a non-determination appeal a blunt instrument. It is best used where the delay itself is the problem, the scheme is sound, and the relationship with the authority has stopped producing anything.
Cost of each route compared
| Route | Direct cost | Main risk |
|---|---|---|
| Agree an extension | Consultant time only, plus the fee refund given up | Further drift, and a second extension request |
| Let the period expire and appeal non-determination | No appeal fee, but appeal preparation costs | Inspector decides the submitted scheme with no chance to amend |
| Invite a decision and appeal a refusal | No appeal fee, appeal preparation costs | A refusal on the record, and appeal timescales |
| Withdraw and resubmit | Fee, unless a free further application applies | Loses the case officer's work to date |
Appeals themselves carry no fee to the Inspectorate, so the cost is professional time, which on a written representations appeal is moderate and on an inquiry is not. Withdrawal and resubmission is worth pricing properly, because the fee regulations allow one further application without fee in defined circumstances within a set period after a refusal or withdrawal, and whether you qualify depends on the detail. Our note on when no planning fee is payable sets out those circumstances.
Programme effect
Compare elapsed time rather than fees, because on most schemes the programme cost dominates.
An agreed extension typically adds weeks. A written representations appeal adds months, and the timescale varies with the Inspectorate's caseload. A hearing or inquiry adds considerably more. Resubmission restarts an eight or 13 week clock from validation, plus the time to revise the drawings.
So the arithmetic usually favours the extension where the officer is supportive and the delay is procedural, such as waiting for a consultee response or for a committee date. It favours forcing the issue where the authority has gone quiet, the recommendation is negative, or the delay has no identifiable end. Where the delay is caused by an invalid submission in the first place, the lesson is a different one, as our piece on the real cost of an invalid planning application explains.
When a second extension is requested
The first extension is normal. The second deserves questions, and they should be specific: what remains outstanding, who holds it, what the officer's current recommendation is, and what date the decision will actually be issued.
Ask in writing and ask for a date. An officer who can name the outstanding consultee and a committee date is managing the case. An officer who cannot is telling you something, even if not in those words.
Three practical positions for a second request. Agree it with a stated end date and a note that no further extension will be agreed. Agree it in exchange for something, such as a draft recommendation or a list of the conditions proposed. Or decline it politely and let the period run out, which preserves the appeal option without slamming any doors.
Evidence that the scheme will be supported
The decision turns on your read of the officer's position, so gather it deliberately.
- ask directly whether the officer is minded to support the application and what remains unresolved
- read the consultation responses on the register as they arrive rather than waiting for a summary
- count the objections and check whether any raise a matter the scheme cannot answer
- find out whether the application is going to committee and when that committee sits
- check whether a similar scheme in the area has been supported recently, and on what reasoning
Where the answers point towards support, extend. Where they point towards a refusal recommendation, the question becomes whether you would rather argue the case to an Inspector on the submitted scheme or amend and try again.
Making the call
The pattern that works most often: extend once, willingly, on a scheme the officer supports. On a scheme heading for refusal, invite the decision, read the reasons, and then choose between an appeal and a revised application with the reasons in front of you. A refusal is information, and a well reasoned refusal notice is more useful than six more weeks of silence.
One honest uncertainty: some authorities use extension requests to manage performance statistics rather than because the case needs more time, and you cannot always tell which is happening. Asking for a decision date in writing is the cheapest way to find out.
Where budget is the constraint, the pricing page sets out what PlanScope costs for drafting the supporting documents, and the report types by category page shows what a resubmission would typically need. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
This is general guidance, not legal advice; check the current appeal deadlines and fee regulations, and take advice from a qualified professional before relying on it.
Frequently asked questions
What is a planning extension of time?
A written agreement between applicant and local planning authority to extend the statutory determination period, which is eight weeks for most minor applications, 13 weeks for major development and 16 weeks where an environmental statement is submitted. During the extended period the applicant cannot appeal for non-determination and the authority can still decide.
Does agreeing an extension affect the fee refund?
It can. The planning guarantee provides for a fee refund where an application is not determined within 26 weeks, and that operates differently once a longer period has been agreed. On a major application with a substantial fee this is worth checking against the current guidance before agreeing to anything.
What is an appeal for non-determination?
An appeal to the Planning Inspectorate on the ground that the authority failed to determine the application within the statutory period, available once that period expires with no agreed extension. The authority then loses the power to decide, negotiation stops, and the Inspector considers the scheme as submitted without the chance to amend it.
Is it better to be refused than to wait?
Often, where the officer's recommendation is negative. A refusal notice gives reasons you can answer, either through an appeal or through a revised application, and the fee regulations allow one further application without fee in defined circumstances. Six more weeks of silence gives you nothing to work with.
Should a second extension be agreed?
Only with questions answered: what is outstanding, who holds it, what the current recommendation is and what date the decision will issue. Agree it with a stated end date, or in exchange for a draft recommendation and condition list, or decline it politely so the appeal option is preserved.
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.