Pre-commencement conditions and the agreement requirement
Section 100ZA of the Town and Country Planning Act 1990 stops a council imposing a pre-commencement condition without your written agreement. Miss the notice deadline and you are treated as having agreed.
A council in England cannot impose a pre-commencement condition on a full planning permission without your written agreement to its terms. The rule sits in section 100ZA of the Town and Country Planning Act 1990, inserted by the Neighbourhood Planning Act 2017, with the procedure set by the Town and Country Planning (Pre-commencement Conditions) Regulations 2018. For anyone programming a start on site, pre-commencement conditions decide whether you break ground in March or in September. The agreement requirement hands you a lever. It also carries a trap, because staying silent counts as agreeing.
What makes a condition pre-commencement
Section 100ZA(8) draws the line tightly. A pre-commencement condition is one that has to be complied with before any building or other operation comprised in the development is begun, or, where the proposal is a material change of use, before that change of use begins.
Two things follow from that wording. Conditions triggered by a later event sit outside the definition, so a condition requiring a landscaping scheme before first occupation is not a pre-commencement condition however inconvenient it is. And outline planning permission is excluded from the section altogether, which means the agreement requirement does not apply to conditions on an outline consent or to reserved matters approvals.
Read the trigger words rather than the subject matter. "No development shall take place until" is pre-commencement. "Prior to the commencement of above-ground works" is not, because groundworks can lawfully begin. That distinction gets missed regularly by both sides.
The agreement the authority has to obtain
The prohibition in section 100ZA(5) is absolute in its own terms: permission may not be granted subject to a pre-commencement condition without the written agreement of the applicant to the terms of the condition. Agreement is to the drafting, not to the general idea. If you agree to a contamination condition and the officer then issues a differently worded one, the condition you agreed to is not the condition imposed.
The requirement also applies to the applicant, which is worth checking when the applicant is a special purpose vehicle, an option holder or an agent acting under a limited authority. Whoever is named on the form is the person whose agreement counts. Make sure that person is the one reading the emails in decision week.
Nothing in the section forces the authority to grant permission. If you refuse to agree a condition the officer considers necessary, the realistic outcomes are a differently worded condition, a refusal, or a recommendation to committee that reflects the disagreement. Refusing agreement is a negotiating position rather than a veto.
The notice procedure and the ten working day window
The 2018 Regulations set out how agreement is sought. The authority serves a written notice that gives the full text of the proposed condition, the reasons for imposing it and the reasons for imposing it as a pre-commencement condition, and it specifies a period for the applicant to respond. That period cannot be shorter than ten working days beginning with the day after the notice is given.
You have three practical replies:
- Agree the condition as drafted, in writing, and let the decision issue.
- Agree subject to an amendment, with your redraft attached, so the officer has something to accept rather than a bare objection.
- Refuse agreement and set out why the matter can be handled at a later trigger or through a different mechanism.
Send the response by the route the notice specifies and keep the delivery record. These notices often arrive by email late in the eight-week period, from an officer clearing a decision, and they are easy to lose in a busy inbox.
Silence is treated as agreement
This is the part that catches people. The Regulations provide for agreement to be treated as given where the applicant does not respond within the period stated in the notice. Miss the window and you are taken to have accepted the condition exactly as drafted, with no route back other than a later section 73 application to vary it.
So diarise the deadline the moment a notice lands, and give the site manager and the funder sight of it. A condition requiring an intrusive ground investigation before any operation on site can push a start date past a survey season or a funding drawdown, and by then the argument is over.
Moving a condition to a later trigger
Most negotiation is about the trigger, not the substance. Officers are usually willing to move a requirement if the planning purpose is still met and the drafting is enforceable.
| Requirement | Common pre-commencement wording | Realistic later trigger |
|---|---|---|
| Construction management plan | Before any works begin | Before any works other than site set-up, fencing and enabling works |
| Materials samples | Before development begins | Before any external wall is constructed above damp proof course |
| Landscaping scheme | Before development begins | Before first occupation, with planting in the first available season |
| Ecological mitigation strategy | Before development begins | Before any vegetation clearance or demolition |
| Drainage details | Before development begins | Before any drainage infrastructure is installed |
Two arguments carry weight. The first is that the condition fails the tests for conditions in national policy and Planning Practice Guidance on the use of planning conditions, which require conditions to be necessary, relevant, enforceable, precise and reasonable. The second is that a narrower trigger achieves the same planning purpose, which is a point about drafting rather than principle and is far easier for an officer to accept.
Conditions that stay where they are
Some requirements do have to bite before anything happens on site, and pushing on them wastes the goodwill you need elsewhere.
Ground investigation and remediation strategies for potentially contaminated land come first, because the point is to characterise the ground before it is disturbed. Archaeological written schemes of investigation are pre-commencement by design, since evaluation trenching has to happen before groundworks. Protected species mitigation and licensing sit ahead of clearance for the same reason. Piling method statements where a water undertaker or the Environment Agency has raised a groundwater concern belong before piling rather than after it. Tree protection fencing under BS 5837:2012 has to be in place before any machinery arrives.
Biodiversity net gain sits in its own category. Under the Environment Act 2021 regime the biodiversity gain condition is deemed to be attached to most permissions, and the biodiversity gain plan has to be approved by the authority before development begins. That is a statutory pre-commencement requirement rather than a negotiable condition, so treat it as fixed and programme the survey work accordingly. A Biodiversity Net Gain Assessment has to be completed by a competent person, and no draft removes that requirement.
What an unnecessary pre-commencement condition costs
The application to discharge conditions carries a fee set in the fees regulations and indexed annually, so check the current schedule before you budget. The authority has eight weeks to determine it. Section 74A of the 1990 Act offers a deemed discharge route where an authority fails to determine in time, but a long list of condition types is excluded from it, so it is a backstop rather than a plan.
The real cost is the programme. An illustrative example: a 24-unit scheme secures permission in late February with a pre-commencement condition requiring an approved construction management plan. The consultant needs three weeks, the authority takes its eight, and the start slips to mid-May. That drags the earthworks into a wetter period and pushes first completions past the point the funding appraisal assumed. None of that appears in a fee note.
Front-load the work instead. Where the evidence base is already drafted at application stage, officers have less reason to condition it. Setting out mitigation clearly in the Planning Statement that accompanies the application often converts a condition into a note on the decision, and it pays to read what a pre-commencement condition actually blocks before you decide which ones to fight.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.
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Frequently asked questions
Does the agreement requirement apply to outline planning permission?
No. Section 100ZA excludes outline planning permission from the definition, so conditions on an outline consent and on reserved matters approvals can be imposed without seeking your written agreement. The requirement applies to full permissions, including householder and minor applications. If you are working on an outline scheme, the negotiation happens through the officer rather than through a statutory notice.
How long do I have to respond to a pre-commencement condition notice?
The notice must specify a response period of at least ten working days, beginning with the day after the notice is given. Some authorities allow longer. Check the notice itself rather than assuming the minimum, and reply in writing by the route the notice names so you have a record of the date the response was sent.
What happens if I ignore the notice?
You are treated as having agreed to the condition as drafted. The regulations provide for deemed agreement where the applicant does not respond within the stated period, so no reply is the same as a yes. Your only route afterwards is a section 73 application to vary the condition, which carries its own fee and determination period.
Can I agree to a condition but ask for different wording?
Yes, and that is usually the productive response. Reply agreeing in principle and attach a redraft that moves the trigger to a later event, such as before above-ground works or before first occupation. Officers accept redrafts more readily than bare refusals because the planning purpose is still met and the condition remains enforceable.
Is the biodiversity gain plan a pre-commencement condition I can negotiate?
No. Under the Environment Act 2021 regime the biodiversity gain condition is deemed to be attached to most planning permissions, and the biodiversity gain plan must be approved before development begins. It is a statutory requirement rather than a discretionary condition, so programme the ecology work and metric calculation into the pre-start period.
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.