Lawful Development Certificates & the Prior Approval Process:
Not every project needs planning permission.
But that doesn’t mean it’s risk-free.
Two terms often come up at this stage:
Lawful Development Certificates and Prior Approval.
They sound technical.
But both are about one thing – certainty.
Lawful Development Certificate (LDC): Proving It’s Permitted
A Lawful Development Certificate is a formal confirmation from the local authority that your proposal is lawful under Permitted Development.
In simple terms:
You’re asking the council to agree that you don’t need planning permission.
It’s not about design quality. It’s not a planning judgement. It’s a technical assessment based on rules:
Does it fall within size limits?
Is it in the correct position?
Does it meet all PD criteria exactly?
If it does, the certificate confirms it in writing. You can build without one. But most projects benefit from it. Because without it, you’re relying on interpretation.
And interpretation carries risk.
Prior Approval: Permitted, But Not Fully
Prior Approval sits somewhere between Permitted Development and full planning. The principle of development is already accepted—but certain aspects still need to be assessed by the council.
Typically, this includes:
Impact on neighbours (light, privacy)
Appearance and materials
Flood risk or transport considerations (depending on project type)
So while you don’t submit a full planning application, you are still seeking approval on specific points. It’s a lighter process. But not automatic.
Why the Difference Matters...
Both routes sit outside full planning. But they behave very differently.
An LDC is about certainty before you build. Prior Approval is about acceptance of specific impacts.
Confusing the two can lead to delays – or worse, building something that isn’t actually lawful.
Reducing Uncertainty Early These processes exist to simplify development. But only when they’re used with clarity. A small misstep—a dimension, a boundary condition, a classification—can shift a project into a different route entirely. That’s why early understanding matters.
A More Certain Starting Point Lawful Development Certificates provide confidence. Prior Approval provides control.
Both are tools. Neither replaces careful design.
Good decisions aren’t just about what you can build. They’re about knowing where you stand before you start.
Lawful Development Certificates & The Prior Approval Process
Lawful Development Certificates & the Prior Approval Process:
Not every project needs planning permission. But that doesn’t mean it’s risk-free.
Two terms often come up at this stage:
Lawful Development Certificates and Prior Approval.
They sound technical.
But both are about one thing – certainty.
Lawful Development Certificate (LDC): Proving It’s Permitted
A Lawful Development Certificate is a formal confirmation from the local authority that your proposal is lawful under Permitted Development.
In simple terms:
You’re asking the council to agree that you don’t need planning permission.
It’s not about design quality. It’s not a planning judgement. It’s a technical assessment based on rules:
If it does, the certificate confirms it in writing. You can build without one. But most projects benefit from it. Because without it, you’re relying on interpretation.
And interpretation carries risk.
Prior Approval: Permitted, But Not Fully
Prior Approval sits somewhere between Permitted Development and full planning. The principle of development is already accepted—but certain aspects still need to be assessed by the council.
Typically, this includes:
So while you don’t submit a full planning application, you are still seeking approval on specific points. It’s a lighter process. But not automatic.
Why the Difference Matters...
Both routes sit outside full planning. But they behave very differently.
An LDC is about certainty before you build.
Prior Approval is about acceptance of specific impacts.
Confusing the two can lead to delays – or worse, building something that isn’t actually lawful.
Reducing Uncertainty Early
These processes exist to simplify development. But only when they’re used with clarity.
A small misstep—a dimension, a boundary condition, a classification—can shift a project into a different route entirely.
That’s why early understanding matters.
A More Certain Starting Point
Lawful Development Certificates provide confidence.
Prior Approval provides control.
Both are tools. Neither replaces careful design.
Good decisions aren’t just about what you can build. They’re about knowing where you stand before you start.