Before starting a building project, one of the first questions to answer is whether you need planning permission. A planning permission checker can help you make an initial assessment based on the type of work you want to carry out, the property involved and the location.
However, planning rules are not always straightforward. Permitted development rights, previous planning decisions, local restrictions and the nature of the proposed work can all affect whether an application is required.
This guide explains how a planning permission checker works, what you should check before starting a project and when professional planning advice may be appropriate.
What Is a Planning Permission Checker?
A planning permission checker is a tool or source of guidance that helps you determine whether a proposed development may require planning permission.
You may be able to use a checker to assess common projects such as:
- Home extensions
- Loft conversions
- New buildings
- Outbuildings
- Changes to the use of a property
- Development of land
- Alterations to existing buildings
- Some commercial or agricultural projects
The result will generally depend on the type and scale of development, the property’s circumstances and whether permitted development rights apply.
Planning permission is generally required for development, although certain works and changes of use may be permitted without a planning application under permitted development rights.
How Does a Planning Permission Checker Work?
A planning permission checker typically starts with the details of your proposed project.
You may need to consider:
- What you want to build or change
- The existing use of the property
- The proposed use
- The size and position of the development
- Whether the property has been extended previously
- The location of the property
- Whether the site is in a protected or restricted area
- Whether permitted development rights apply
For example, an extension to a house may fall within permitted development rights if it meets the relevant conditions and limitations. A similar project could require a planning application if those requirements are not met.
This means a checker can be useful for an initial assessment, but it should not be treated as a universal answer for every property or development.
What Projects Usually Need a Planning Permission Check?
Some types of development are more likely to raise planning questions than others.
Extensions and alterations
If you are planning to extend your home, change its external appearance or make significant structural alterations, it is worth checking the planning position before beginning work.
Some household extensions and alterations may fall within permitted development rights, but these rights have conditions and limitations relating to matters such as size, height and location.
New buildings
Constructing a new house, commercial building or other substantial structure will normally require planning permission.
Smaller structures may have different rules depending on their purpose, size, location and relationship with an existing property.
Change of use
Changing how a building or piece of land is used can also raise planning issues.
For example, converting a property from one use to another may constitute a material change of use. Some changes can benefit from permitted development rights, while others require a planning application.
Land development
If you are looking to develop land, divide a site, construct buildings or introduce a new use, checking the planning position early can help you understand whether the proposal is likely to require an application.
Land development can involve more planning considerations than a straightforward householder project, particularly where access, highways, neighbouring properties or existing land uses are involved.
Can a Planning Permission Checker Tell You If You Need Permission?
A planning permission checker can provide a useful starting point, but it may not provide a definitive answer for every project.
Planning rules can depend on details that are specific to an individual property or site. Previous extensions, planning conditions, Article 4 directions, conservation areas and other restrictions can affect whether permitted development rights are available.
GOV.UK explains that permitted development rights are subject to conditions and limitations, and that these rights can be removed or restricted in certain circumstances.
Where there is uncertainty about whether proposed work is permitted development, a lawful development certificate can provide a formal decision from the local planning authority on whether the existing or proposed development is lawful.
Check Permitted Development Before Applying
One of the most important parts of checking planning permission is establishing whether your proposal could qualify as permitted development.
Permitted development rights are national grants of planning permission for certain types of development. They allow qualifying work to take place without submitting a standard planning application, provided the relevant conditions and limitations are satisfied.
However, permitted development does not mean that every project of a particular type is automatically exempt.
For example, restrictions can apply in protected areas, and an Article 4 direction can remove certain permitted development rights. Some permitted development schemes also require prior approval from the local planning authority before work can begin.
This is why checking the specific property and proposal is important rather than relying solely on a general rule.
What Else Should You Check?
Planning permission is only one part of the approval process.
Even where a planning application is not required, you may still need other permissions, consents or approvals. These can include:
- Building regulations approval
- Listed building consent
- Consent relating to protected trees
- Advertisement consent
- Environmental permits or licences
- Other site-specific consents
GOV.UK specifically notes that permitted development rights do not remove the need to comply with other relevant permission and consent regimes.
It is also important to distinguish planning permission from building regulations. Planning permission generally considers the acceptability of development and its impact on the surrounding area, while building regulations deal with matters relating to how construction work is carried out and whether it meets required standards.
Why the Property’s Location Matters
The same type of development can have different planning considerations depending on where it is located.
Your property may be affected by:
- Conservation area restrictions
- Article 4 directions
- Listed building status
- National Park or other protected-area considerations
- Planning conditions
- Local planning policies
- Previous planning decisions
These factors can affect permitted development rights or introduce additional requirements.
This is particularly important when a project appears straightforward but the property has restrictions that are not obvious from the proposed design.
What Happens If You Build Without Required Permission?
If planning permission is required and development takes place without it, the local planning authority may take enforcement action.
GOV.UK states that unauthorised development can result in enforcement action, while carrying out work without required permission can lead to an enforcement notice requiring changes to be undone.
Checking the planning position before work starts is therefore much safer than assuming permission is unnecessary and dealing with the consequences later.
If you have already carried out work and are unsure about its planning status, professional advice can help you understand your options.
How to Check Planning Permission for Your Project
A sensible planning permission check should involve more than asking whether similar projects normally require permission.
Start by defining exactly what you want to do. Consider the existing building or land use, the proposed changes, the scale of the development and its position on the site.
You can then:
- Check whether the proposal falls within a category that normally requires planning permission.
- Check whether permitted development rights could apply.
- Review the relevant conditions and limitations.
- Check whether the property is subject to local or site-specific restrictions.
- Look at previous planning permissions and conditions where relevant.
- Identify whether other consents or approvals may be required.
- Seek professional advice if the planning position remains unclear.
For more information on the wider planning process, you can also explore Planning Build’s resources on planning permission and planning applications.
Get Professional Help With Your Planning Permission Check
A planning permission checker can be a useful first step, particularly for straightforward projects. But where the proposal involves multiple planning considerations, relying on a general checklist may not give you the full picture.
Planning Build can help you assess your proposed development, understand the planning requirements and determine the appropriate next step before you commit to the application process.
Whether you are considering an extension, change of use, new development or another type of project, getting the planning position clear at the beginning can help you make better decisions about the project.
Explore Planning Build’s planning services or contact the team to discuss your project.
