If you are planning to make changes to your property or need to establish whether previous building work is lawful, you may need to apply for a Lawful Development Certificate. This certificate provides formal confirmation of the planning status of a particular existing or proposed development or use.
Although it is not compulsory for every project, obtaining a certificate can be useful when you want written confirmation that your proposed work does not require planning permission or that an existing development is lawful. It can also provide valuable documentation when selling a property or responding to planning-related enquiries.
However, submitting an application involves more than completing a form. You need to identify the correct type of certificate, provide an accurate description of the development, and include sufficient supporting information for the Local Planning Authority (LPA) to assess your case.
Whether you are considering a house extension, garage conversion, garden building or an existing development with an unclear planning history, understanding the application process can help you prepare properly.
What Is a Lawful Development Certificate?
A Lawful Development Certificate is a legal document issued by a Local Planning Authority confirming that a particular existing or proposed use or development is lawful for planning purposes.
It does not grant planning permission. Instead, it confirms whether the development or use described in the application is lawful under the relevant planning legislation.
There are two main types of certificate:
The correct application depends on whether the development has already taken place or is still being proposed.
For example, if you are planning a house extension that you believe falls within permitted development rights, you may apply for a proposed certificate before starting construction. If an extension has already been built and you need to establish its planning status, an existing certificate may be appropriate.
The certificate only covers the specific development or use described in the application. This makes it important to provide an accurate description and ensure that the submitted plans reflect the work being considered.
When Should You Apply for a Lawful Development Certificate?
There are several circumstances in which applying for a certificate may be beneficial. The appropriate route depends on your property, the nature of the development and what you need the Council to confirm.
1. Before Starting Building Work
If you are planning an improvement to your property, you may want confirmation that the proposed work can proceed without a full planning permission application.
Certain home improvements can fall within permitted development rights, provided that all relevant conditions and limitations are satisfied.
This may include certain:
However, permitted development rights do not apply automatically to every property or project. The planning history, property type, location and details of the proposed work can all affect the assessment.
A proposed Lawful Development Certificate application allows you to ask the Local Planning Authority to confirm whether the specific development would be lawful if carried out as described.
Obtaining a certificate before construction can provide greater certainty about the planning position and useful documentation for future reference.
2. To Establish Whether Existing Building Work Is Lawful
You may discover that previous building work was carried out without planning permission, or that the relevant documentation is no longer available.
This could involve an extension, garage conversion, outbuilding or another alteration completed by a previous owner.
An existing Lawful Development Certificate application may help establish whether the development is lawful for planning purposes. Depending on the circumstances, this could be because planning permission was not required or because the relevant enforcement period has passed.
The applicant must provide sufficient evidence to support the claim. The age of the development alone does not automatically establish that it is lawful.
3. When Selling or Purchasing a Property
A property’s planning history can become particularly important during a sale or purchase.
A prospective buyer, solicitor or mortgage lender may request confirmation that previous alterations or an existing use are lawful. If the necessary planning records are unavailable, this can create additional enquiries and uncertainty.
A Lawful Development Certificate can provide formal confirmation of the planning position for the specific development or use covered by the document.
If you are preparing to sell a property, obtaining the appropriate certificate may help address planning-related questions and provide useful evidence for the conveyancing process.
4. To Confirm an Existing Use of a Property
A certificate may also be appropriate where you need to establish whether an existing use of a building or land is lawful.
For example, there may be uncertainty about how a property has been used over time or whether a particular activity requires planning permission.
These applications can involve detailed consideration of the history and nature of the use. The evidence should clearly explain the circumstances and support the legal basis for the application.
How to Apply for a Lawful Development Certificate
The application process involves several stages, from identifying the correct certificate to preparing the supporting documents and submitting the application to the Council.
Step 1: Establish Which Certificate You Need
The first step is to determine whether you need an existing or proposed certificate.
If the development or use has already taken place, an existing certificate may be appropriate. If you want confirmation before starting work, you would generally consider a proposed certificate.
Choosing the correct application type is important because the information and evidence required will differ. If you are uncertain about the appropriate route, reviewing the property’s planning history and obtaining professional planning advice can help clarify your options before you proceed.
Step 2: Review the Property’s Planning History
Before preparing the application, it is useful to establish what planning permissions, previous applications and conditions relate to the property.
This information can help identify whether the proposed or existing development has already been authorised and whether any restrictions may affect the application.
For example, an earlier planning permission may contain conditions that restrict further alterations. Previous extensions may also be relevant when assessing whether a new proposal falls within permitted development rights.
A review of the planning history can therefore help identify potential issues before the application is submitted.
Step 3: Prepare an Accurate Description of the Development
The application must clearly describe the development or use for which the certificate is being requested.
For a proposed development, this means explaining exactly what work you intend to carry out. For an existing development, you need to describe what has already taken place and the circumstances surrounding it.
A vague description may make it difficult for the Local Planning Authority to understand what it is being asked to certify.
The description should be consistent with the submitted drawings, plans and supporting information.
Step 4: Gather the Required Drawings and Supporting Documents
Once the application type and development description have been established, the next stage is to prepare the relevant documents.
The requirements depend on the circumstances of the project.
For proposed building work, architectural drawings and site plans may be required to show the existing property and the intended development.
For existing development, the focus may be on gathering historical records and other evidence that supports the claimed planning status.
It is important to ensure that the documents are accurate, relevant and clearly presented.
Step 5: Complete the Application Form
The appropriate Lawful Development Certificate application form must be completed with details of the property, the development and the applicant.
You will generally need to provide:
There are separate application routes for existing and proposed certificates, so make sure you select the correct form.
Step 6: Submit the Application to the Local Planning Authority
Once the application form and supporting documents have been prepared, the application can be submitted to the relevant Local Planning Authority.
Applications can generally be made through the Planning Portal or directly to the Council, depending on its submission arrangements.
The relevant application fee must also be paid. The amount depends on the type of certificate and the nature of the development.
After submission, the Council will check the application and confirm whether it contains the information required for validation. If anything is missing or needs clarification, further information may be requested.
Step 7: Await the Council’s Decision
Once the application has been validated, the Local Planning Authority will assess the information and determine whether the relevant legal requirements have been satisfied.
The standard determination period is generally eight weeks from validation, although the circumstances of the application and any further information requests may affect the process.
If the certificate is granted, it will identify the development or use that has been confirmed as lawful.
What Documents Are Required for a Lawful Development Certificate Application?
The documents required depend on whether you are applying for an existing or proposed certificate. Providing sufficient information is essential because the Council needs to understand the development and assess the relevant legal requirements.
Documents for a Proposed Development
If you are applying before carrying out building work, the application may require:
The drawings should accurately represent the development being proposed. If the design changes significantly after the certificate has been issued, you may need to consider whether a further application is required.
Evidence for an Existing Development
For an existing certificate, the application may require evidence demonstrating when the development or use began and the circumstances in which it has continued.
Depending on the case, supporting information may include:
The evidence should be clear, consistent and relevant to the specific legal basis of the application.
For example, if you are claiming that building work was completed before the relevant enforcement period expired, the supporting information should help establish when the development was substantially completed.
The applicant is responsible for providing sufficient evidence to support an existing certificate application. A general statement about how long the development has existed may not be enough on its own.
How Does the Council Assess a Lawful Development Certificate Application?
Unlike a standard planning permission application, a Lawful Development Certificate application is not assessed on the planning merits of the development.
The Local Planning Authority considers whether the development or use is, or would be, lawful under the relevant planning legislation.
Assessment of a Proposed Certificate
For a proposed certificate, the Council considers whether the development would be lawful if carried out exactly as described in the application.
This may involve assessing whether the proposal meets the relevant permitted development requirements or whether planning permission is otherwise unnecessary.
The authority will consider the submitted plans, measurements, written description and relevant planning circumstances. If the proposal does not satisfy the applicable legal requirements, the certificate may be refused.
Assessment of an Existing Certificate
For an existing certificate, the Council considers the facts and evidence relating to the development or use.
The applicant must demonstrate that the relevant legal test has been met. This may involve establishing that the development did not require planning permission or that the authority can no longer take enforcement action in the circumstances.
The quality and consistency of the evidence are particularly important.
Can the Council Ask for Further Information?
Yes. The Local Planning Authority may request clarification or additional information if the application does not provide enough detail for a decision.
For example, it may need clearer drawings, a more precise description of the development or further evidence relating to the history of an existing use.
Responding to these requests promptly can help the authority continue its assessment.
What Happens If Your Application Is Refused?
A Lawful Development Certificate application can be refused if the Council is not satisfied that the relevant legal requirements have been met.
Common reasons may include:
If your application is refused, you should review the Council’s decision and the reasons provided.
Depending on the circumstances, you may be able to submit additional evidence, make a revised application or consider whether a different planning route is appropriate. There may also be a right of appeal to the Planning Inspectorate. An appeal will consider whether the Council’s decision was correct in light of the relevant facts and planning law.
A refusal does not necessarily mean that the development can never be authorised. It may indicate that the application did not provide sufficient information to establish lawfulness or that another form of approval is needed.
What Is the Difference Between a Lawful Development Certificate and Planning Permission?
Although both involve the Local Planning Authority, a Lawful Development Certificate and a planning permission application serve different purposes.
Planning permission is required where a proposed development needs formal approval under planning legislation. The authority considers the planning merits of the proposal, including relevant policies and its potential effects on the surrounding area.
A Lawful Development Certificate, on the other hand, asks whether a particular existing or proposed development or use is lawful under the relevant legal provisions.
The authority does not assess whether the proposal is attractive, whether neighbours support it or whether it represents good design. The decision focuses on its legal status for planning purposes.
A certificate cannot be used as a substitute for planning permission where permission is required. If your proposal does not qualify as lawful, you may need to consider a planning application instead.
Does a Lawful Development Certificate Replace Building Regulations Approval?
No. A Lawful Development Certificate confirms the planning lawfulness of the specific development or use described in the certificate.
It does not confirm that building work complies with Building Regulations or remove the need to obtain other relevant approvals.
For example, an extension may qualify as permitted development and receive a proposed Lawful Development Certificate. However, the construction work may still need to comply with Building Regulations requirements relating to structural safety, fire safety, insulation and other technical matters.
Planning and Building Regulations are separate processes, so it is important to establish which approvals apply to your project before construction begins.
How Expert Planning Consultants Can Help With Your Application
Preparing a Lawful Development Certificate application involves more than completing a form. You need to establish the correct application type, understand the relevant planning requirements, and provide information that clearly supports your case.
At Expert Planning Consultants, we can help you assess your circumstances and identify the most appropriate route for your project.
Our support can include:
Whether you need to establish the lawfulness of previous building work or obtain confirmation before starting a proposed development, professional guidance can help you approach the application with greater clarity.
If you are unsure whether your proposed work falls within permitted development rights, our guide to Permitted Development Rules provides further information about the requirements and restrictions that may apply.
Frequently Asked Questions
Can I apply for a Lawful Development Certificate myself?
Yes. You can submit an application yourself through the Planning Portal or the relevant Local Planning Authority. However, you must provide the correct application form, plans and supporting evidence. Professional assistance may be useful where the planning position or evidence requirements are complicated.
How long does a Lawful Development Certificate application take?
The standard determination period is generally eight weeks from the date a valid application is received and validated by the Local Planning Authority. The actual time taken may vary if further information is required or other circumstances affect the assessment.
Do I need planning permission if I have a Lawful Development Certificate?
A certificate confirms that the specific development or use described in it is lawful for planning purposes. It does not grant planning permission for additional or materially different work that falls outside its description.
Can I apply for a certificate after building work has been completed?
Yes. You can apply for an existing Lawful Development Certificate to establish whether completed building work or an existing use is lawful. You will need to provide sufficient evidence to support your application.
Is a Lawful Development Certificate compulsory?
No. It is not compulsory for every development that qualifies as permitted development. However, it can provide formal confirmation of the planning position and useful documentation for future reference.
What happens if I do not have architectural drawings?
The documents required depend on the nature of the application. Where drawings are needed, you may need to arrange for an architect or designer to prepare suitable plans. The application should contain enough information for the Council to understand precisely what is being considered.
Can I appeal if my application is refused?
Yes. There may be a right of appeal to the Planning Inspectorate if the Local Planning Authority refuses your application. You should review the decision notice and the relevant appeal procedure to understand your options.
Does a Lawful Development Certificate expire?
A certificate does not generally have a fixed expiry date. However, its effect is limited to the development or use it describes. A proposed certificate may also be affected by a material change in relevant circumstances before the development begins.
Get Support With Your Lawful Development Certificate Application
Applying for a Lawful Development Certificate can provide important confirmation of the planning status of an existing or proposed development. However, choosing the correct application type, preparing accurate drawings and providing sufficient supporting evidence are essential parts of the process.
Whether you are planning an extension, converting a garage, constructing an outbuilding or seeking confirmation about previous building work, establishing the correct application route can help you move forward with greater certainty.
Contact Expert Planning Consultants today to discuss your Lawful Development Certificate application. We can help you assess your circumstances, understand the relevant planning requirements, and prepare for the next stage of your project.