A retrospective planning application allows a property owner or developer to apply for planning permission after development has already taken place. It can be relevant where building work, an extension, alteration or change of use has been completed without the planning permission that was required.
Planning issues can come to light for several reasons. A homeowner may have assumed that work was covered by permitted development rights, a previous owner may have carried out unauthorised alterations, or a property may have changed use without the necessary consent. The issue may only become apparent when the property is being sold, refinanced, developed further or reviewed by the local planning authority. A retrospective application can provide a route for addressing the situation, but it should not be treated as an automatic way of obtaining approval. The development is still assessed against relevant planning considerations.
Before applying, it is important to establish whether planning permission was actually required and whether another route, such as a Lawful Development Certificate, could be more appropriate. Studio Charrette can help property owners and developers assess their planning position and prepare the planning and architectural information required for a retrospective application.
What Is a Retrospective Planning Application?
A retrospective planning application is an application submitted to the local planning authority for development that has already been carried out. A conventional planning application is normally submitted before development starts. The authority then considers the proposed development before work takes place. With a retrospective application, the development already exists when the application is assessed. Retrospective applications can relate to a range of projects, including:
- House extensions.
- Loft conversions.
- Outbuildings.
- External alterations.
- New structures.
- Changes of use.
- Commercial development.
- Other development requiring planning permission.
The local planning authority does not simply approve the development because it has already been constructed. It must still consider whether the development is acceptable in planning terms. This makes the preparation of the application particularly important. Accurate drawings, appropriate supporting information and a clear planning strategy can help the authority understand the development and assess the relevant considerations.
When Is a Retrospective Planning Application Required?
A retrospective application may be required where development has taken place without planning permission when planning permission was necessary. One common example is a house extension. A property owner may believe that an extension qualifies as permitted development, but the development may fall outside the relevant limitations because of its height, depth, location or other characteristics.
A similar issue can occur with a change of use. Changing how a property is used can sometimes require planning permission, depending on the existing lawful use and the new use. However, not every development carried out without a planning application is automatically unauthorised. Some development may have been permitted under permitted development rights. In other cases, there may be evidence that the development is lawful and that a Lawful Development Certificate could be appropriate. For this reason, it is generally sensible to establish the planning position before submitting an application.
Types of Development That May Need Retrospective Permission
House Extensions
House extensions are a common source of retrospective planning issues. An extension may have been constructed without planning permission because the owner believed it fell within permitted development rights. If it does not meet the relevant requirements, retrospective planning permission may be necessary. The authority may consider the extension’s scale, height, appearance, position and relationship with neighbouring properties.
Loft Conversions
Many loft conversions can be carried out under permitted development rights where the relevant conditions are satisfied. However, some projects fall outside those rights. Where a loft conversion has already been completed without the required permission, the planning position should be assessed before deciding whether a retrospective application is necessary.
Outbuildings
Garages, garden rooms and other outbuildings can also create planning issues. Their size, height, position and intended use can affect whether permitted development rights apply.
Changes of Use
A property may have been used for a purpose that differs from its lawful planning use. Depending on the nature of the change, planning permission may have been required. Studio Charrette can provide support for both proposed and existing changes of use through its planning services.
Retrospective Planning Application Process
1. Assess the Existing Development
The first step is to establish exactly what has been built or changed. This can involve reviewing the property’s existing plans, photographs, measurements, previous documents and information about when the work was completed. Understanding the development accurately is important because the application needs to describe what actually exists.
2. Review the Planning History
The property’s planning history should be examined before the application is prepared. Previous applications, permissions, refusals and planning conditions can provide important information about the site. A previous permission may also contain conditions that affect the existing development.
3. Determine the Correct Planning Route
Once the existing development has been assessed, the next step is to determine whether retrospective planning permission is required. Depending on the circumstances, the appropriate route could instead involve permitted development rights or a Lawful Development Certificate. Selecting the correct route at the beginning can help avoid unnecessary applications and costs.
4. Identify Planning Constraints
Relevant constraints should be considered before submission. These can include:
- Conservation area status.
- Listed building status.
- Article 4 Directions.
- Green Belt considerations.
- Heritage constraints.
- Highway considerations.
- Previous planning conditions.
- Neighbouring properties.
The significance of each constraint depends on the individual development.
5. Prepare Architectural Drawings
Accurate architectural drawings are often an important part of a retrospective planning application. The drawings need to show the existing development clearly so that the local planning authority can understand what has been constructed. Depending on the project, drawings may include existing and proposed floor plans, elevations, site plans and location plans. Studio Charrette’s Architectural Design Services can support clients with the preparation of planning drawings.
6. Prepare Supporting Information
The information required depends on the nature and scale of the development. A planning statement may be appropriate where the proposal requires a more detailed explanation of its planning context. Other supporting documents may also be required depending on the site and development.
7. Submit the Application
Once the application has been prepared, it can be submitted to the relevant local planning authority. The authority will first validate the application before proceeding with its assessment.
8. Respond to Planning Issues
During the determination process, the authority may identify concerns or request additional information. Where appropriate, the applicant may be able to provide clarification, additional evidence or amendments.
9. Receive the Decision
The authority can approve the application, approve it subject to conditions or refuse it. If permission is refused, the reasons for refusal should be carefully reviewed before deciding what action to take.
What Does the Local Planning Authority Consider?
The exact considerations depend on the development, but several issues can commonly be relevant.
Impact on Neighbouring Properties
The authority may consider whether the development has an unacceptable effect on neighbouring properties. This can include:
- Loss of privacy.
- Overlooking.
- Overshadowing.
- Loss of daylight.
- Overbearing effects.
- Noise.
- Other effects on residential amenity.
The significance of these matters depends on the site’s circumstances and applicable planning policies.
Design and Appearance
The design and appearance of an existing development can also be relevant. The authority may consider whether the development is compatible with the character of the property and surrounding area. This can be particularly important where development is visible from public areas or affects a designated area.
Highways and Parking
Changes to access, parking or traffic generation can also be relevant. For example, a change of use may generate additional parking demand or affect the way vehicles access the site.
Heritage
Additional considerations can apply where development affects a listed building or conservation area. The planning strategy should therefore take the property’s heritage status into account.
Can a Retrospective Planning Application Be Refused?
Yes. A retrospective planning application can be refused. The fact that the development has already been completed does not mean that the local planning authority has to approve it.
The authority will assess the development against relevant planning policies and material considerations. If the development causes unacceptable planning harm or conflicts with applicable policies, permission may be refused.
If this happens, the reasons for refusal are important.
Depending on the circumstances, the applicant may consider:
- Amending the development.
- Submitting a revised application.
- Appealing the decision.
- Removing or altering parts of the development.
- Seeking further planning advice.
The appropriate response depends on the reasons for refusal and the individual circumstances of the property.
Retrospective Planning and Enforcement
Retrospective planning can become particularly important where the local planning authority has already identified unauthorised development. If an enforcement notice has been issued, the requirements and deadlines should be reviewed carefully.
Submitting a retrospective application does not automatically cancel an enforcement notice or guarantee that enforcement action will stop. The planning application and enforcement position should therefore be considered together. Where enforcement action is involved, obtaining professional planning advice promptly can help you understand the available options and avoid overlooking important deadlines.
Why Professional Support Matters
Retrospective planning applications can be more challenging than conventional applications because the development has already been constructed. With a proposed development, design changes can often be considered before construction begins. With an existing development, opportunities to make changes may be more limited.
Professional planning support can help identify potential issues before an application is submitted. It can also help establish:
- Whether planning permission is required.
- Whether another planning route may be available.
- Which planning policies are relevant.
- What information should accompany the application.
- Whether design changes could improve the proposal.
- How potential planning concerns should be addressed.
A well-prepared application can provide a clearer explanation of the development and its planning context.
Why Choose Studio Charrette for Retrospective Planning?
Studio Charrette combines planning and architectural expertise to support homeowners, landowners and developers with development projects. Our services include:
- Retrospective planning applications.
- Planning permission.
- Planning appraisals.
- Architectural design.
- Planning Statements.
- Planning appeals.
- Planning enforcement support.
- Building Control.
- Structural drafting.
- Change of Use Planning Permission.
This integrated approach allows planning considerations and architectural requirements to be considered together. Our planning services can help you establish the appropriate planning route for your development. Where architectural drawings are required, our architectural design services can support the preparation of clear and accurate plans.
Address Your Planning Issue with the Right Strategy
A retrospective planning application can provide a route towards regularising development that has already taken place without the necessary planning permission. However, it is not an automatic solution, and approval is not guaranteed.
The first step is to establish the property’s planning position and determine whether retrospective planning permission is actually required. In some cases, permitted development rights or a Lawful Development Certificate may provide a more appropriate route.
Where retrospective permission is required, careful preparation can help ensure that the existing development is clearly presented and relevant planning considerations are properly addressed.
Ready to address an existing planning issue? Contact Studio Charrette to discuss your retrospective planning application with our planning and architectural team.
Frequently Asked Questions
Is retrospective planning permission guaranteed?
No. The local planning authority assesses the application on its planning merits and can refuse permission.
Can I apply for retrospective planning permission without an enforcement notice?
Yes. An enforcement notice does not have to be issued before a property owner seeks to address an unauthorised development.
What happens if my retrospective application is refused?
The next step depends on the reasons for refusal. Options may include making amendments, submitting another application or appealing the decision.
Can Studio Charrette help with retrospective planning applications?
Yes. Studio Charrette can assess your planning position, prepare architectural drawings and supporting information, and provide planning support throughout the application process.
