Pre-commencement conditions and the written agreement rule
A pre-commencement condition must be met before any work begins. Since October 2018 an authority cannot impose one in England without your written agreement or a prescribed notice first.
A pre-commencement condition is a condition on a planning permission that has to be satisfied before any building or other operation in the development is begun, or before a change of use starts. The meaning matters because since 1 October 2018 an authority in England cannot impose one without the applicant's written agreement, or without first going through a prescribed notice procedure. That restriction sits in section 100ZA of the Town and Country Planning Act 1990, inserted by the Neighbourhood Planning Act 2017.
So the familiar list of "no development shall take place until" conditions is now something you get a say in before the decision notice is issued, rather than something that lands on you with it.
What counts as pre-commencement
The test is the trigger, not the subject matter. A condition requiring a construction method statement to be approved before works start is pre-commencement. The same requirement worded so that the statement is submitted before first occupation is not, even though the document is identical.
That distinction is where most of the negotiation happens. A contamination remediation strategy really does have to be agreed before the ground is disturbed. A boundary treatment detail does not, and a landscaping scheme almost never does. Officers draft from precedent lists and will often hang four or five details on commencement because that is how the template reads, so read the trigger wording on every condition rather than scanning the subject headings.
Conditions that require something before a particular phase or operation within the development are also caught where that operation is part of the development, which catches phasing conditions on larger sites.
The written agreement requirement
Section 100ZA provides that planning permission for development in England may not be granted subject to a pre-commencement condition without the written agreement of the applicant, unless the regulations allow the authority to proceed anyway. The Town and Country Planning (Pre-commencement Conditions) Regulations 2018 set out that fallback.
In outline, the authority gives the applicant notice of the condition it proposes to impose. The notice has to set out the text of the proposed condition, the full reasons for it, and a date by which a substantive response is invited, which must give the applicant at least ten working days. If the applicant agrees, the condition goes on. If the applicant objects with reasons, the authority has to think again and cannot simply impose it. If the applicant says nothing at all by the deadline, the authority may impose the condition as if agreement had been given.
Silence is therefore the worst answer. Diarise the response date the moment a notice arrives, because an unanswered notice hands back exactly the discretion the section was written to remove.
A response does not have to be a flat refusal. The useful reply accepts the condition in principle, proposes the same requirement with a different trigger, and explains why the authority's planning purpose is still met. Officers accept that far more readily than an outright objection.
Conditions that cannot lawfully be imposed at all
The written agreement rule sits on top of the ordinary tests for any condition. The Planning Practice Guidance on the use of planning conditions sets out six: a condition must be necessary, relevant to planning, relevant to the development permitted, enforceable, precise and reasonable in all other respects. A condition failing any of them is unlawful whether or not you agreed to it.
Three patterns fail regularly in practice. Conditions requiring a matter already controlled by other legislation are usually unnecessary, which is the standard objection to conditions duplicating the Building Regulations. Conditions requiring works on land the applicant does not control are unenforceable unless framed in Grampian form, as a prohibition on development until the off-site works are done. And conditions reserving a matter so fundamental that the permission has no real content fail the reasonableness test, because the authority has effectively granted something it has not assessed.
Agreeing a condition does not cure any of that. Agreement under section 100ZA removes one objection, not the rest.
What happens if work starts before the condition is met
The consequence depends on whether the condition is a true condition precedent. Where it is, the courts have treated operations carried out in breach of it as incapable of amounting to a lawful commencement of the permission, which means the permission can expire unimplemented while the works on the ground sit without consent. Inspectors and officers refer to this as the Whitley principle, and later cases have narrowed it to conditions that really do prohibit the start of development rather than every condition that mentions the start of works. Treat the case law as indicative of how the issue has been approached rather than as a formula.
The enforcement consequences are more immediate. A breach of condition notice under section 187A of the 1990 Act carries no right of appeal, and an enforcement notice can require the breach to be remedied. On a funded scheme the practical damage usually arrives first through the funder, because a solicitor reporting on title will not certify that development was lawfully begun.
Where development is already under way, a retrospective approval of the details does not necessarily cure the breach. Ask the question before the digger arrives, not after.
Discharging before a start on site
An application for approval of details reserved by condition is made to the authority with a fee per request set by the national fees regulations, which are indexed, so check the current schedule. The authority has eight weeks to determine it unless a longer period is agreed.
Programme it properly. On a site with contamination, ecology and highways conditions, the realistic sequence is:
- Commission the surveys the conditions require, allowing for any seasonal constraint.
- Submit each discharge application separately so one slow consultee does not hold up the rest.
- Allow eight weeks per application, plus consultee response time on contamination and highways.
- Get the approval notices in writing before any ground is broken, including site clearance.
Section 74A of the 1990 Act provides a deemed discharge mechanism where an authority fails to determine certain applications in time, but prescribed descriptions of condition are excluded from it, so check whether yours qualifies before relying on it. Contamination and remediation conditions are exactly the sort that need a written approval rather than a deemed one.
Varying a condition you cannot meet
Two routes exist. An application under section 73 of the 1990 Act varies or removes a condition and produces a fresh permission, with the original left standing, and the authority can only consider the condition rather than reopening the principle. An application under section 96A deals with a non-material amendment and is quicker, but the amendment has to be truly non-material, which a change to the substance of a pre-commencement requirement rarely is.
Either route takes weeks you may not have. The better move is to deal with the trigger wording before the decision is issued. Ask the case officer for the draft conditions as soon as the recommendation is settled, read every trigger, and use the section 100ZA notice to move anything that does not need to be satisfied before works start to a later stage such as first occupation or completion of the relevant phase. Construction controls like vibration limits during demolition and piling often sit perfectly well on a pre-occupation or phase trigger instead.
Where the works also need listed building consent, the conditions on that consent run on their own track, and on an estate with repeated works a heritage partnership agreement can settle a programme of agreed works in advance instead. Conditions on a permission for a change of use follow the same logic, and the commencement point there is the change of use itself rather than any physical work, which matters where a use is intensifying rather than changing outright.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.
If you are assembling the supporting documents that the conditions will refer back to, browse the report types by category and start a draft.
PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
What does pre-commencement condition mean?
It means a condition on a planning permission that has to be discharged before any building or other operation in the development begins, or before a change of use starts. The test is the trigger wording rather than the subject matter, so the same requirement becomes an ordinary condition if it is tied to first occupation instead.
Can a council impose a pre-commencement condition without my agreement?
Not straightforwardly. Section 100ZA of the Town and Country Planning Act 1990 requires the applicant's written agreement, and the 2018 regulations give the authority a fallback only after it has served notice of the proposed condition, its text and its reasons, and allowed at least ten working days for a substantive response.
What happens if I ignore the notice about a proposed condition?
The authority may impose the condition as if you had agreed to it. Silence is treated as consent under the procedure, so the response deadline should go in the diary as soon as the notice arrives. A reasoned objection, or a counter-proposal moving the trigger to first occupation, keeps the discretion with you.
What happens if work starts before a pre-commencement condition is discharged?
Where the condition is a true condition precedent, operations carried out in breach of it may not count as a lawful commencement, so the permission can lapse while the works sit without consent. A breach of condition notice under section 187A carries no right of appeal, and funders usually spot the problem at the certification stage.
How do I change a pre-commencement condition I cannot meet?
An application under section 73 varies or removes the condition and creates a fresh permission. Section 96A deals only with truly non-material amendments, which a change to the substance of a pre-commencement requirement rarely is. Both routes take weeks, so fixing the trigger wording before the decision notice is issued costs far less.
How long does it take to discharge a condition?
An application for approval of details reserved by condition is determined in eight weeks unless a longer period is agreed, and a fee per request applies under the national fees regulations, which are indexed annually. Submit each condition separately so one slow consultee does not delay the others.
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.