Is a Certificate of Lawfulness the Same as Planning Permission

Is a Certificate of Lawfulness the Same as Planning Permission?

When carrying out building work or alterations to a property, it is common to hear about both planning permission and certificates of lawfulness. Although they are linked, they are not the same. Each serves a different purpose, and understanding the difference is important if you want to ensure your project is legal and properly documented.

What Is Planning Permission?

Planning permission is formal approval from the local authority that allows you to carry out certain types of development. It is required for projects that fall outside permitted development rights, such as large extensions, new dwellings, major alterations, or works affecting listed buildings. Planning permission is judged against national and local planning policies, neighbour impacts, design considerations and environmental factors. If granted, it allows the development to proceed, subject to any conditions attached.

What Is a Certificate of Lawfulness?

A certificate of lawfulness, sometimes called a lawful development certificate, is different. It does not grant planning permission. Instead, it is confirmation from the local authority that an existing or proposed development is lawful and does not need planning permission. There are two main types: certificates for existing use or development, which confirm that past works are now lawful, often due to the passage of time without enforcement; and certificates for proposed use or development, which confirm that planned works are permitted development and do not require formal planning consent.

Key Differences Between the Two

The main difference is that planning permission grants permission to carry out work that would not otherwise be allowed, whereas a certificate of lawfulness simply confirms that permission is not needed. Planning permission looks forward, allowing you to start a new project, while a certificate often looks back, providing reassurance that existing works are lawful.

Another difference is how they are assessed. Planning permission is judged on planning policies, design, and the impact of the proposal on the local area. A certificate of lawfulness, on the other hand, is purely a legal decision. The council does not consider neighbour objections or the desirability of the development. They simply assess whether the work falls within permitted development rights or whether it has become lawful through the passing of time.

When to Apply for Each

You need planning permission if your project does not fall within permitted development limits or if you are making significant changes such as a two storey extension or a new building. You might apply for a certificate of lawfulness if you want written confirmation that your project is permitted development, or if you are selling a property and need evidence that past works, such as a loft conversion or garage conversion, are lawful.

For example, if you are planning a small rear extension that you believe is permitted development, a certificate of lawfulness will provide reassurance to future buyers or lenders that the work was legally carried out. If, however, the extension exceeds the permitted limits, planning permission will be required instead.

Why the Difference Matters

The distinction matters because the consequences of confusing the two can be significant. Carrying out work without planning permission, when it is required, can result in enforcement action and costly alterations. On the other hand, carrying out work without a certificate of lawfulness does not make it unlawful if it genuinely falls under permitted development, but having the certificate provides security and peace of mind, especially when selling or remortgaging a property.

Summary

A certificate of lawfulness is not the same as planning permission. Planning permission grants formal approval for developments that need it, while a certificate of lawfulness confirms that permission is not required or that past works are legally recognised. Both are important in different circumstances, and understanding which applies to your situation will help you manage your project with confidence.