Conditions requiring details before work starts

A pre start condition on a planning permission means exactly what it says: no development may begin until the authority has approved the details it asks for. Dig a foundation trench before that approval and the work is unlawful, and in some cases the permission itself is treated as never having been implemented. For a self-builder with a contractor booked and a loan drawdown scheduled, that is the most expensive mistake available in the whole planning process.

The good news is that these conditions are now harder for an authority to impose than they used to be, and easier to reorder if you ask at the right moment. The right moment is before the decision is issued.

Why some conditions bite before anything happens

The planning system uses conditions to make an otherwise unacceptable scheme acceptable. Some of those details only work if they are settled first: a construction method statement is useless after the groundworks, and a scheme for protecting a tree cannot be agreed once the roots are severed.

National guidance asks authorities to keep pre-commencement conditions to a minimum and to apply the usual tests, so each condition must be necessary, relevant to planning, relevant to the development, enforceable, precise and reasonable.

There is also a statutory brake. Section 100ZA of the Town and Country Planning Act 1990, with the 2018 regulations made under it, prevents an authority imposing a pre-commencement condition without the applicant's written agreement, following a prescribed notice procedure. The authority must give you the proposed wording and its reasons, with a response period of at least ten working days.

Two things follow. If you receive that notice, answer it, because a failure to respond substantively within the period can leave the authority free to impose the condition. And if you disagree, say which alternative trigger you would accept rather than simply objecting, since the authority's other option is to refuse the application.

Finding them on the decision notice

Pre-commencement conditions are not labelled as such. You have to read the trigger wording in each condition, and the phrasing varies.

Triggers that bite before anything happens:

• "No development shall take place until" a named detail is approved
• "Prior to the commencement of development"
• "Before any works begin on site"
• "No development, including demolition or site clearance, shall take place until" the detail is agreed

Triggers that bite later:

• "No development above damp proof course level", or above ground level.
• "Prior to the first occupation of the dwelling"
• "Before the development is brought into use"
• "Within three months of the date of this permission"

Go through the notice with a highlighter on the day it arrives and build a list with a date against each. Four or five pre start conditions on a single dwelling permission is common, and they often need different consultees, which means they cannot all be dealt with in one submission.

One practical warning. A condition requiring something "prior to commencement of development" that also covers demolition or site clearance catches activities most people do not think of as development, including tree felling and stripping topsoil.

What counts as starting development

Development begins when a material operation is carried out. Section 56 of the Town and Country Planning Act 1990 lists what counts, and the list is wider than most self-builders assume.

The grey areas are real and they are decided on the facts. A single trial pit is investigation. A grid of them excavated with a machine while the groundworker is on site starts to look like a start. Where it matters, write to the case officer and get a view in writing before the plant arrives.

Starting in breach, and the Whitley principle

This is the part worth understanding properly, because the consequence is not simply a telling off.

Where a condition expressly prohibits any development until details are approved, work carried out in breach of it is unlawful, and it cannot count as a lawful start on the permission. The courts have applied that reasoning since the Whitley case. The practical effect is that a permission with a three year time limit can expire while a half-built house stands on the site, because nothing lawful was ever begun.

Later decisions have softened the edges. The courts now distinguish conditions that go to the heart of the permission from conditions that merely require details to be submitted, and a breach of the second kind does not necessarily invalidate the start. But the distinction is a matter of construction of the particular condition, decided case by case, and it is not something to rely on in advance.

Three practical consequences:

1. The authority can serve a breach of condition notice, against which there is no right of appeal.
2. A retrospective submission of the details may cure the position prospectively but does not make the earlier works lawful.
3. A lender or a purchaser's solicitor will find the gap, and the usual fix is an indemnity policy or a certificate application, both of which take time.

So the rule is simple. Treat every pre start condition as absolute until a written approval is on the file.

Agreeing which conditions can wait

The best time to deal with this is before the decision notice is issued. When the officer sends the draft conditions, or serves the section 100ZA notice, you have an opening to negotiate the trigger.

What usually works:

• Moving a materials condition from pre-commencement to pre-above-ground-level, which is the natural point anyway.
• Moving a landscaping scheme to a condition requiring submission within a stated period and implementation in the first planting season.
• Moving a surface water drainage detail to pre-above-ground-level where the groundworks do not depend on it.
• Combining several related details into a single condition with one submission.

What rarely works: tree protection, archaeological evaluation, contamination remediation strategies, construction management plans and ecological mitigation. Each of those exists precisely to control what happens at the start, and an authority will not move them.

Ask the question in writing and explain why the trigger is wrong for that particular detail. An officer who sees a reasoned alternative trigger will often accept it. One who receives a general objection to pre-commencement conditions will not.

How long the authority has, and deemed discharge

An application for approval of details reserved by condition has a determination period of eight weeks. The authority's practice varies, and conditions requiring consultee input take longer in reality than the period suggests.

There is a statutory remedy. Section 74A of the Town and Country Planning Act 1990 allows an applicant to serve a deemed discharge notice where the authority has failed to determine a details application in time, and the condition is then treated as discharged. It does not apply to every condition, with exceptions including matters connected with environmental impact assessment, so check whether your condition is excluded before relying on it.

Even where it is available, deemed discharge is a blunt tool. A condition discharged by default leaves you with no approved detail to point at later, which matters when a building control inspector or a purchaser asks what was agreed. Use it as a bargaining point rather than as a plan.

Two things that speed up a real discharge. Submit each condition separately where they involve different consultees, so one slow response does not hold up the rest. And send the submission to the case officer by email on the day it is validated, with a short note saying which condition it addresses. Knowing how consultee responses reach the officer's case file helps you chase the right body rather than the council.

A fee is payable for each request for approval of details, and the amount is revised periodically, so check the current schedule. The rules on planning fee exemptions and reductions are relevant where several submissions are needed on one permission.

Evidence of compliance to keep

Build a condition file as you go. Six items per condition:

The decision notice with the condition highlighted. The submission itself, dated, with the drawing or report numbers. The authority's acknowledgement. The written approval, which is the document that matters. Dated photographs of the works that follow, showing the approved detail in place. And a note of the date of the material operation that constituted the start.

That last item is the one nobody records and the one everyone needs. Take photographs of the first foundation trench with a dated reference in frame, and keep the groundworker's invoice. A permission is implemented once and the evidence of it is worth keeping for the life of the building.

Where the submission needs a supporting narrative, a short Planning Statement explaining how the detail meets the condition saves a round of correspondence, and the full list of report types shows which technical documents commonly sit behind pre start conditions.

This is general guidance, not legal advice; check the wording of your own conditions and 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.