Pre-commencement conditions and your right to refuse them

A pre-commencement condition agreement is a legal requirement, not a courtesy. Section 100ZA of the Town and Country Planning Act 1990, inserted by the Neighbourhood Planning Act 2017, prevents a local planning authority in England from granting permission subject to a pre-commencement condition without the applicant's written agreement to that condition. The procedure for seeking that agreement sits in the Town and Country Planning (Pre-commencement Conditions) Regulations 2018.

The provision is less useful than it sounds, for one reason that catches architects and agents repeatedly. Silence counts as agreement.

What section 100ZA actually requires

The section applies to conditions that must be complied with before development begins, and to conditions that prohibit a specified operation or activity until the condition has been complied with. Those are the conditions the applicant has a say in.

Everything else is unaffected. Conditions to be discharged before the slab is poured, before occupation, before first use or at any other trigger are outside the section, and an authority may impose them in the ordinary way. So can conditions restricting the development to approved drawings, limiting hours, or requiring compliance with a submitted document.

The purpose of the section was to reduce the number of conditions that stop a site starting while details are agreed. Whether it has done so is arguable. What it has undeniably done is create a short procedural window that has to be handled properly.

The notice procedure and the deemed agreement trap

The Regulations set out how an authority seeks agreement. The notice must give the text of the proposed condition and the full reasons for imposing it, and it must invite a substantive response within a stated period.

Here is the part that matters. If the applicant does not give a substantive response within that period, they are treated as having agreed to the condition. The default is agreement, not refusal.

Three practical habits follow.

Watch the inbox during determination, including the shared agent mailbox and the spam folder, because the notice often arrives by email late in the process.

Diarise the response deadline the day the notice arrives, and count the period exactly as the Regulations state rather than approximately.

Respond substantively even when you agree, in writing, so that the file records a positive agreement rather than a deemed one. A deemed agreement is just as binding and far harder to explain to a client later.

Which conditions count, and which do not

The distinction is about the trigger rather than the subject matter.

That final row is where most negotiation happens. Moving a trigger from before development begins to before development above slab level lets a site start on groundworks while the details are resolved, which is often all the applicant actually needs.

Negotiating wording rather than refusing outright

Refusing agreement is a blunt instrument. If the authority considers the condition necessary and agreement is withheld, it may refuse the application, and the applicant is then appealing a refusal rather than arguing about a condition.

Four moves are more productive than refusal.

1. Move the trigger later, to slab level, to above ground works, to first occupation or to a named phase.
2. Narrow the scope, so the condition requires a specific document rather than an open-ended scheme.
3. Split the condition, agreeing the element that must come first and moving the rest.
4. Offer a substitute, such as a submitted document approved at determination, which removes the need for the condition entirely.

Put the alternative wording in the response rather than objecting in the abstract. Officers are working to a determination deadline and will usually take a draft they can paste in over an argument they have to resolve.

Archaeology, ecology and drainage

Three subject areas really do need a pre-commencement trigger, and pushing back on them wastes goodwill.

Archaeological evaluation has to happen before the ground is disturbed, because the ground is the evidence. The usual structure is a written scheme of investigation approved before development begins, with a watching brief or excavation following. Where an Archaeological Desk-Based Assessment has already narrowed the area of interest, the condition can often be limited to a defined zone rather than the whole site.

Ecology mitigation frequently has to be in place before clearance. Vegetation removal outside the bird nesting season, exclusion fencing for reptiles or amphibians, and any licence required for protected species are all matters where a later trigger is meaningless because the harm occurs at the start.

Drainage is the one worth negotiating hardest. Authorities routinely require a full surface water drainage scheme before development begins, when the practical need is only for the scheme to be approved before the drainage is built. A Drainage Strategy submitted with the application, at a level of detail the lead local flood authority can accept in principle, often removes the condition altogether.

What happens if agreement is withheld

The authority has three options and none of them is automatic.

It may impose the condition with a different trigger, which is usually what the negotiation produces. It may decide the condition is not necessary after all, which happens more often than applicants expect where the reasons cannot be articulated. Or it may refuse permission on the basis that the development is unacceptable without the control the condition would provide.

Weigh the third possibility honestly before withholding agreement on a scheme where the timetable matters. An appeal against refusal takes far longer than a badly triggered condition costs.

There is also a practical point about relationships. An agent who negotiates conditions constructively on every application is heard differently from one who withholds agreement as a matter of routine.

Record keeping through determination

Keep a conditions file from the day the application is validated. It should hold the notice as received with its date, the response sent with its date, any agreed alternative wording, the officer's confirmation, and the final decision notice with the conditions as imposed.

That file answers the question that arises two years later when a contractor asks whether the site can start, and it is the evidence if a dispute reaches an appeal against a refusal to discharge. Related practicalities around discharging pre-commencement conditions and the fees for discharge applications are worth reading alongside, since the drafting decisions taken at determination set the cost of discharge later.

Further background on the duty itself sits in this note on the section 100ZA duty.

One habit is worth adopting across a practice rather than a project. Draft your preferred condition wording for the three or four conditions you know an authority will want, and attach it to the application as an appendix to the covering letter. Officers rarely refuse a sensible offer that saves them drafting time, and it converts a reactive ten day scramble into a decision you made months earlier with the programme in front of you. It also gives the client a realistic start date rather than an optimistic one.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it, and read the current text of the section and the Regulations rather than a summary.

Reform in this area continues, and the planning law updates timeline is the place to follow it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.