Re-consultation after amended plans during determination
Amending a scheme after submission is a matter of discretion, not right. The test is whether the development is in substance what was applied for and whether anyone is prejudiced by the change.
There is no statutory right to amend a scheme after submission, and no statutory duty to re-consult when a council accepts an amendment. Both are matters of discretion and fairness, which is why amended plans re consultation is handled so differently from one authority to the next.
The practical position is settled enough to plan around. A case officer can accept revised drawings during determination where the development remains in substance what was applied for, and must give people who might be prejudiced by the change a further chance to comment.
When amendments can be accepted at all
Councils accept amendments constantly, usually because the officer has asked for them. Reduced depth on a rear projection, a relocated bin store, a revised parking layout, an additional obscure-glazed window: these are the ordinary currency of determination.
The limiting principle comes from the courts rather than from the Order. An amendment is acceptable where the development, as amended, is in substance that which was applied for, and where nobody who had the opportunity to comment is prejudiced by not seeing the change.
That test is applied to the development as a whole, not to the size of the drawing change. Moving a building three metres can be minor on an open site and fundamental on a tight urban plot where three metres is the gap to a neighbouring window.
Officers also apply an internal policy on how many rounds they will accept. Most will take one substantive revision and lose patience at the third, because each round restarts their own consultation and reporting work.
The test the council applies
Expect the officer to ask four questions before agreeing to accept amended drawings.
- Is the description of development still accurate, or does the change alter what was advertised.
- Would any consultee who has already responded reach a different view on the amended scheme.
- Would a neighbour who chose not to object to the original scheme reasonably object to this one.
- Is there time to run a further consultation and still report the application.
A yes to the first question is usually fatal. Where the amendment changes the description, for example by adding a unit or changing the use, the application has to be re-advertised under the new description or withdrawn, because the publicity carried out was for something else.
Questions two and three are where judgement sits. Amendments that reduce impact, such as lowering a ridge or increasing separation, rarely prejudice anybody, and some councils accept them without re-consulting at all. Amendments that move impact from one neighbour to another almost always require a further round, even when the overall scheme improves.
How long a further period runs
The statutory publicity period for an application is 21 days. For amended plans, most councils run a shorter targeted period, commonly 14 days, and notify only the parties affected by the change rather than everybody on the original list.
Ask the officer three things when they agree to re-consult: how long the period is, who is being notified, and when the report will be drafted. The third question is the one that tells you whether your amendment will be considered in time.
Statutory consultees are a separate matter. Where a highway authority, a lead local flood authority or the Environment Agency has commented on the original scheme, the officer will normally re-consult them on anything touching their remit, and their response times are not shortened just because the change is small. A Planning Statement addendum explaining precisely what has changed and why saves a consultee re-reading the whole submission, and it tends to come back faster.
Amendments that go too far
Some changes cannot be made by revision, whatever the goodwill on either side.
- Adding development that was not advertised, such as an extra dwelling or an additional storey.
- Changing the red line boundary to include land outside the original application site.
- Changing the use applied for.
- Introducing a change that triggers a requirement the application did not meet, such as environmental impact assessment screening or a fire statement.
- Changing the ownership position so that a different certificate and notice are needed.
The red line point catches schemes that need to pull in a visibility splay or a drainage connection discovered late. Extending the site requires fresh certificates, fresh notice to any other owner, and fresh publicity, and at that point the application is effectively a new one.
Effect on the determination period
Amendments do not extend the statutory determination period. Eight weeks for a minor application, 13 for a major and 16 for environmental impact assessment development run from validation regardless of how many revisions arrive.
So the practical mechanism is the agreed extension of time. Where a re-consultation will push the report beyond the deadline, the officer asks for an extension in writing and the applicant agrees it. Refuse, and the council either determines the application on the unamended scheme or refuses it for the reasons that prompted the amendment in the first place.
Get the extension in writing with a specific date rather than an open-ended agreement. An extension without an end date removes your ability to appeal against non-determination and leaves the timetable entirely in the council's hands. Where determination has already slipped badly, applying direct to the Planning Inspectorate is a different route with its own criteria, but it is not a remedy for a scheme you are still negotiating.
Keeping the drawing schedule straight
This is where careful practices still make mistakes, and the consequences last for the life of the permission.
Every amended drawing needs a new number or a clear revision suffix, and the submission email should list what is superseded. Do not reissue a drawing under the same number with different content. The decision notice will list approved plans by number and revision, and an ambiguity there becomes an enforcement argument years later.
Keep a single schedule showing, for each drawing, the original number, the revision submitted, the date, and whether it supersedes an earlier version. Send it with every revision. When the officer drafts the decision notice, they will copy from your schedule, and a clean schedule is the difference between a permission that describes the building you want to construct and one that does not.
Check the draft list of approved plans before the decision is issued if the officer will share it. Correcting an error at that point takes an email. Correcting it afterwards takes a section 96A application.
When to withdraw and resubmit
Sometimes the honest answer is to stop. Withdraw and resubmit where the description has to change, where the site boundary has to move, or where the scheme has been revised so many times that the submitted documents no longer describe it.
The fee position helps more than people expect. Where an application is withdrawn, one further application for substantially the same development on the same site by the same applicant within 12 months of the withdrawal attracts no fee, so the cost of starting again is often just the time.
Resubmission also resets the consultation properly, which matters if the relationship with objectors has become the real obstacle. Watching how a revised scheme is publicised is part of tracking an application from the outside, and it cuts both ways.
Browse all 66 report types to check which supporting documents a revised scheme may need updating.
This is general guidance rather than 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
Does a council have to re-consult on amended plans?
There is no statutory duty in most cases. The obligation comes from fairness: where an amendment could lead someone who had the chance to comment to take a different view, they should get a further opportunity. Amendments that clearly reduce impact are often accepted without a further round, at the officer's discretion.
How long is a re-consultation period for revised drawings?
Most councils run a targeted period of around 14 days and notify only the parties affected by the change, rather than repeating the full 21 day publicity. Statutory consultees are handled separately and their response times are unchanged. Ask the officer for the length, the notification list and the date the report will be drafted.
Do amendments extend the determination period?
No. The eight, 13 or 16 week periods run from validation regardless of revisions. Where re-consultation would push the decision past the deadline, the officer will ask for an agreed extension of time in writing. Agree a specific end date rather than an open-ended extension, which removes your ability to appeal against non-determination.
When is an amendment too large to accept?
Where the description of development would change, where the red line boundary has to move, where the use applied for changes, or where the revision triggers a requirement the application never met, such as environmental impact assessment screening. Any of those normally means withdrawing and resubmitting rather than revising in place.
What does withdrawing and resubmitting cost?
Often only time. Where an application is withdrawn, one further application for substantially the same development on the same site by the same applicant within 12 months attracts no fee. Resubmission also restarts publicity cleanly, which can be worth doing where the submitted documents no longer describe the scheme.
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.