What are the The Six Planning Condition Tests?

When you read through your planning approval, you’ll usually find a list of conditions — often written in formal, legal-sounding language. It can feel like you’ve swapped one mountain of paperwork for another.

But here’s the secret: not all conditions are created equal.
Every single one has to pass six specific tests set out in national policy. These tests act as a safety net — protecting you from unfair, unclear, or unreasonable demands, and ensuring councils only use conditions where they genuinely make a difference.

If a condition fails any of these tests, it can be challenged or struck out altogether. So, knowing what they mean isn’t just interesting — it’s practical.

Let’s break them down one by one.

The Background: From Courtroom to Council Office

These six tests come from two places: the courts and national planning policy.

The landmark Newbury case (1981) laid down the original legal principles that allows conditions to be added to a planning decision. Those principles were later expanded and written into government policy — now found in Paragraph 57 of the National Planning Policy Framework (NPPF).

The paragraph says councils should only impose conditions that are:

“Necessary, relevant to planning and to the development to be permitted, enforceable, precise and reasonable in all other respects.”

That’s the six-test checklist. It sounds technical, but each one has a simple purpose — and together, they make sure planning decisions are fair, practical, and legally sound.

1. Necessary

The question: Would the development be unacceptable without this condition?

A condition must solve a real planning problem — not just make the council feel comfortable.

For example:

• If an extension overlooks a neighbour’s garden, a condition requiring obscure glazing is necessary to protect privacy.

• But if the materials are clearly shown on the approved plans, a second condition asking for samples might not be necessary.

The principle here is proportionality.

Councils must ask themselves: “Is this condition essential to make the scheme acceptable?”

If the answer’s “not really,” it shouldn’t be there.

2. Relevant to Planning

The question: Does it deal with a planning issue rather than a private one?

Planning is about the use and development of land — not ownership, morality, or personal arrangements.

So, a condition that restricts who can buy or occupy a property (for example, “The dwelling shall only be sold to local residents”) isn’t relevant to planning. It deals with who owns the land, not how the land is used.

A lawful example might be:

“The dwelling shall be occupied only by a person employed in agriculture.”

That’s relevant because it ties directly to a land-use justification — keeping rural homes available for workers who need to live close to farmland.

This test keeps planning decisions focused on public land-use impacts, not private rights or economics.

3. Relevant to the Development to Be Permitted

The question: Is the condition directly linked to this specific proposal?

Even if a condition is about a planning matter, it still has to relate to the development in question.

A council can’t use your application to fix unrelated issues elsewhere.

For instance:

• ✅ Valid: “Before the dwelling is occupied, the driveway shall be surfaced to prevent mud on the highway.”

• ❌ Invalid: “Before the dwelling is occupied, the applicant shall improve the existing junction 500 metres away.”

The second example might help the area generally, but if your development doesn’t directly cause the problem, the condition fails this test.

In short: your project shouldn’t be used to fund or fix someone else’s issue.

4. Enforceable

The question: Can the council actually check and enforce it?

A condition that can’t be monitored or verified isn’t worth writing. It creates uncertainty for everyone.

Take this example:

“The developer shall ensure that deliveries cause no disturbance to local residents.”

It sounds nice in theory, but how would anyone prove compliance or breach? One neighbour’s “disturbance” might be another’s background noise.

A better version would be:

“No deliveries shall take place outside the hours of 08:00 to 18:00 Monday to Friday.”

Now it’s measurable and enforceable.

This test matters because conditions only work when they can be clearly checked — and breached if ignored.

5. Precise

The question: Is it clear what needs to be done, when, and by whom?

Precision avoids confusion.

A vague condition can cause costly delays later, especially if ownership changes or officers move on. Everyone needs to be able to read it and understand exactly what it requires.

Example of an imprecise condition:

“Details of materials shall be agreed prior to development.”

Agreed by whom? Submitted when? Approved how? It’s too fuzzy.

A precise version might say:

“No development shall commence until details and samples of all external materials have been submitted to and approved in writing by the Local Planning Authority. Development shall be carried out in accordance with the approved details.”

It’s clear, specific, and leaves no doubt.

The courts have reinforced this over the years — notably in Fawcett Properties v Buckingham County Council (1961) — warning that ambiguous conditions may be unenforceable.

6. Reasonable

The question: Is the condition fair and proportionate?

Even if a condition is necessary and enforceable, it must still be reasonable in its practical effect.

A classic example of an unreasonable condition might be one that demands something impossible or excessively costly compared to the issue it’s addressing.

For instance:

• ❌ Unreasonable: “No development shall commence until the applicant constructs a new roundabout on the nearby trunk road.”

• ✅ Reasonable: “No development shall commence until details of visibility splays for the new access are approved.”

The “Wednesbury” principle (from Associated Provincial Picture Houses v Wednesbury Corporation, 1948) underpins this idea: councils must act reasonably, not arbitrarily.

A condition that makes a development unviable or undeliverable is unlikely to stand up under this test.

How These Tests Protect You

It’s tempting to see conditions as an annoyance, but these tests actually safeguard you as the applicant.

They make sure:

• The council can’t impose arbitrary or irrelevant demands.

• The wording is clear so you know exactly what’s required.

• You’re not burdened with unnecessary cost or delay.

• Disputes can be resolved fairly if something goes wrong.

In short, the tests ensure your planning permission is lawful, workable, and predictable.

They also protect your neighbours and community — giving councils a structured, transparent way to manage development without overstepping their powers.

When Conditions Fail the Tests

If a condition doesn’t meet these six tests, it may be unlawful or unreasonable — and you don’t have to accept it.

You can:

1. Discuss it with the case officer before the decision is issued.

2. Request amended wording that still achieves the goal but passes the tests.

3. Appeal the condition after the decision, if necessary.

Appeals can focus solely on the conditions, not the whole permission, which is often a simpler process. The Planning Inspectorate regularly amends or deletes conditions that don’t meet the national tests.

Knowing these principles gives you confidence to challenge gently but effectively.

A Note on Pre-Commencement Conditions

You may come across a condition that starts with:

“No development shall commence until…”

These are called pre-commencement conditions, and they’re especially important because you must discharge them before starting work.

Since 2018, councils have been legally required to get your written agreement before adding any pre-commencement condition. The idea is to stop unnecessary delays — you shouldn’t be prevented from starting work just because of paperwork that could wait until later.

Always read these conditions carefully. If they’re unclear, ask for them to be re-worded or split into stages (for example, “no development above ground level until…”). That keeps your project moving.

Real-World Example: A Small Extension

Imagine you’re building a two-storey rear extension on a suburban house. The council approves the plans with five conditions:

1. The development must start within three years.

2. The works must follow the approved plans.

3. Samples of facing bricks must be approved before use.

4. Construction hours limited to 8am–6pm weekdays.

5. Roof windows to be obscure glazed.

Each of these passes all six tests:

• Necessary: They protect neighbours and ensure design quality.

• Relevant: They all relate to the development itself.

• Enforceable: Each can be checked easily.

• Precise: The wording is clear.

• Reasonable: They don’t create excessive cost or delay.

That’s what good, lawful planning control looks like — firm, fair, and understandable.

Common Pitfalls for Applicants

• Ignoring the tests altogether: Assuming “the council knows best” can lead to unnecessary burdens.

• Missing vague wording: Conditions like “details to be agreed” can delay work later.

• Failing to challenge duplication: Sometimes one condition repeats what another already covers — or what Building Regulations already control.

• Starting before discharge: Even a lawful condition can invalidate permission if you ignore its timing.

The more you understand these principles, the easier it is to manage your project safely.

In Summary

Every planning condition in the UK must satisfy six simple but powerful tests. They ensure conditions are:

• Necessary – genuinely required.

• Relevant – to planning and to the development.

• Enforceable – possible to check.

• Precise – clear in meaning.

• Reasonable – fair and proportionate.

They might sound dry, but they’re the reason your permission works in practice — protecting both your rights and your community’s interests.

If you’ve received planning permission and aren’t sure what your conditions mean — or whether they’re fair — get in touch.
Our team can review your decision notice, identify any unnecessary or problematic conditions, and help you discharge them efficiently so your project stays lawful and on track.

👉 Contact us today for clear, practical planning advice that makes the process simple.

About Me

Andrew Ransome is the planning director at ADP and is a chartered member of the RTPI, with over 22 years of town planning experience.

Andrew has extensive experience offering strategic planning solutions to challenging projects in both rural and urban settings. Follow him on Linkedin

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