Obtaining planning permission is an important milestone in a property development project, but it does not automatically mean that every subsequent change can be carried out without further approval. A revised extension design, an additional window, a larger outbuilding or a change in how a property is used can create planning complications if the work falls outside the scope of the original permission.
For homeowners, landlords and developers, a planning permission breach can affect more than the relationship with the local planning authority. It may also create uncertainty when selling a property, refinancing an investment or completing a development that has already incurred substantial costs.
The key issue is often not simply whether planning permission was granted, but whether the development that exists on the ground complies with the permission and its conditions.
Understanding the nature of a suspected breach, the available options and the potential consequences can help property owners make informed decisions before the situation becomes more difficult to resolve.
What Counts as a Planning Permission Breach?
A planning permission breach occurs when development takes place without the required planning permission or when a development fails to comply with the terms or conditions of an existing permission. The precise position depends on the nature of the work, the applicable planning rules and any relevant permitted development rights.
Common examples include:
- Building an extension that exceeds the approved dimensions.
- Altering the position, size or appearance of windows contrary to approved plans or conditions.
- Constructing an outbuilding in a location that differs materially from the approved design.
- Carrying out development without obtaining permission where it is required.
- Changing the use of a building or land without the necessary consent.
- Failing to comply with a planning condition, such as a restriction on use or an approved landscaping requirement.
Not every difference between a completed building and an approved drawing necessarily amounts to a breach. Some changes may be minor, may fall within permitted development rights or may be authorised through a separate planning procedure.
The first step is therefore to compare the actual development with the approved drawings, decision notice and relevant conditions.
Why Small Changes Can Create Major Planning Problems
A common misconception is that planning permission provides flexibility to make changes as construction progresses. In reality, permission relates to a particular proposal, subject to the approved plans, conditions and relevant legal requirements.
Changes to Approved Drawings
A homeowner may decide to extend a rear extension by an additional metre or alter its roof design after construction begins. Although the change might appear practical, it could affect the building’s appearance, its relationship with neighbouring properties or the original planning assessment.
Depending on the circumstances, the change may require a fresh planning application, an application to amend the existing permission or no further permission at all.
The correct route depends on the extent of the alteration and the legal mechanism available. A section 73 application, for example, can be used in England and Wales to seek permission to develop without complying with certain conditions attached to an existing permission, but it cannot be used to change the approved description of development itself. Other routes may be required for changes to the development’s design or scope.
Failure to Follow Planning Conditions
Planning conditions can control matters such as materials, landscaping, opening hours, drainage, access arrangements or the use of a building.
A development may have received planning permission but still breach planning control if a relevant condition is not followed. Some conditions require approval of further details before work begins, while others impose ongoing requirements after completion.
Owners should review the wording of each condition rather than assume that obtaining the original permission resolves every planning obligation.
Unauthorised Changes of Use
A property owner may begin using a building for a different purpose without checking whether planning permission is required.
Whether a change constitutes development depends on the circumstances, including whether the new use represents a material change of use under planning law. Permitted development rights or other specific rules may also be relevant.
Where a material change of use requires permission, proceeding without it can expose the owner to planning enforcement.
The Financial Consequences of a Planning Permission Breach
A planning breach can affect the financial viability of a property project, particularly where the owner has already invested in construction, materials or professional services.
Remedial Construction Costs
If the local planning authority considers the development unacceptable, the owner may need to modify the building, remove unauthorised elements or restore the property to an acceptable condition.
For example, a roof extension that does not comply with the approved plans may need redesigning or partial reconstruction. The eventual cost can be significantly higher than obtaining advice before the change was made.
Delays to Property Sales and Refinancing
A prospective buyer or lender may ask whether alterations have the necessary planning approval. If a discrepancy emerges between the existing development and the planning records, further enquiries may be needed before a transaction can proceed.
The implications depend on the nature of the breach, the available evidence and the requirements of the buyer, lender or conveyancing professionals involved.
Additional Planning and Professional Fees
Resolving a breach may involve measured surveys, revised architectural drawings, planning applications, technical reports or specialist legal advice.
Where the development also raises building regulations, heritage, environmental or other compliance issues, these may need to be addressed separately.
Identifying the problem early can help owners understand the likely scope of work before committing to a particular solution.
What Should You Do if You Discover a Planning Permission Breach?
The most effective response begins with establishing the facts rather than assuming that the property must be demolished or that retrospective approval will automatically be granted.
Step 1: Compare the Development With the Planning Records
Obtain the original decision notice, approved drawings and any subsequent permissions or condition approvals. Compare these documents with the current building and its use.
A measured survey or professional inspection may help establish whether the difference is significant and whether it falls within the approved scheme.
Step 2: Establish Whether Further Permission Is Required
Not every alteration requires a new application. Some changes may be permitted development, while others may be covered by an existing approval or an appropriate amendment procedure.
However, permitted development rights can be restricted by factors such as property designation, planning conditions and the nature of the development. Owners should verify the position before relying on an exemption.
Step 3: Assess Whether the Development Is Acceptable in Planning Terms
If a breach has occurred, the next question is whether the existing development could reasonably be approved.
Relevant considerations may include its scale, design, impact on neighbouring properties, relationship with local planning policies and any site-specific constraints.
If the development is unlikely to be acceptable in its current form, modifying the work may be more realistic than seeking approval for an unchanged scheme.
Step 4: Choose an Appropriate Resolution Strategy
Depending on the facts, the options may include applying for retrospective planning permission, seeking an appropriate amendment, changing the development to bring it into compliance or responding to an enforcement process.
The best approach should be based on the actual breach and the planning merits of the proposal, not simply on which option appears quickest.
Can You Apply for Retrospective Planning Permission?
In some circumstances, a property owner can apply for retrospective planning permission for development that has already taken place. In England and Wales, section 73A of the Town and Country Planning Act 1990 provides for planning permission to be granted retrospectively.
However, retrospective permission is not guaranteed.
The local planning authority will assess the proposal against the relevant planning considerations, just as it would assess an application made before the development took place. If the development causes unacceptable harm or conflicts with relevant planning policies, the application may be refused.
There are also procedural considerations. In England, an authority may decline to determine a retrospective application in certain circumstances where an enforcement notice has already been issued. The interaction between an application and enforcement proceedings can affect the options available, so owners should obtain advice before deciding how to proceed.
A retrospective application should therefore form part of a considered resolution strategy rather than be treated as an automatic way to legalise unauthorised work.
Planning Enforcement: What Can the Local Authority Do?
Local planning authorities have a range of powers to address breaches of planning control. The action taken depends on the circumstances, the planning harm involved and the authority’s assessment of the appropriate response.
Possible steps include seeking further information, inviting a retrospective application, issuing an enforcement warning notice where the relevant statutory criteria are met, or taking formal enforcement action.
Enforcement Notices
An enforcement notice can specify the breach and the steps required to remedy it. Depending on the case, those steps may involve removing unauthorised construction, ceasing an unauthorised use or carrying out other remedial work.
The notice will set out the relevant requirements and the period for compliance. Owners should read the document carefully and obtain professional advice promptly because appeal deadlines and other procedural requirements can be strict.
Breach of Condition Notices
Where the issue concerns failure to comply with a planning condition, the authority may use a breach of condition notice where the statutory requirements are satisfied.
This is distinct from an enforcement notice, and the available challenge procedures differ. A breach of condition notice does not carry the same right of appeal to the Planning Inspectorate as an enforcement notice.
Enforcement Warning Notices
In England, a local planning authority may issue an enforcement warning notice where it considers that unauthorised development has a reasonable prospect of being acceptable in planning terms. The notice can invite the owner to submit a retrospective application by a specified deadline.
It is important to respond within the stated timeframe. Failure to submit the requested application may lead to further enforcement action.
Do Planning Enforcement Time Limits Protect Older Development?
Property owners sometimes assume that if a structure has existed for several years without challenge, the local authority can no longer take enforcement action. This assumption can be risky.
In England, the applicable enforcement time limit depends on the nature of the breach, when it occurred and the relevant transitional provisions. Under the changes that took effect on 25 April 2024, the general period for many forms of operational development and changes of use to a single dwellinghouse became ten years for qualifying breaches. Certain earlier breaches remain subject to the previous rules, and other categories of breach have their own time limits. Special provisions may also apply in cases involving concealment or earlier enforcement action.
The relevant date is not always simply the day the owner purchased the property or first became aware of the issue. The facts may require careful examination, including when the development was substantially completed or when the unauthorised use began.
Where a property has a long history of development, owners should gather evidence such as dated photographs, building records, historic plans and other relevant documentation. Specialist advice can help determine whether the applicable time limit has expired and whether any exception may apply.
Time limits should never be treated as a substitute for investigating the legal status of a property.
How to Reduce the Risk of a Planning Breach During Construction
Preventing a breach is generally more straightforward than correcting one after work has been completed.
Property owners and developers can reduce the risk by taking the following steps:
- Keep approved plans accessible: Ensure contractors and project managers are working from the correct approved drawings.
- Review proposed changes before implementation: Obtain planning advice before changing the size, layout, appearance or use of the development.
- Track planning conditions: Maintain a record of conditions, approval requirements and relevant deadlines.
- Coordinate professional teams: Ensure architects, engineers, builders and planning advisers communicate about changes that could affect the approved scheme.
- Keep a project record: Retain decision notices, approved drawings, correspondence and evidence of any subsequent approvals.
These measures can help identify potential compliance issues before they lead to additional costs or enforcement concerns.
How Charrette Law Can Help Resolve Planning Permission Breaches
A suspected planning permission breach can create uncertainty about a property’s future, particularly where construction is incomplete, an enforcement notice has been issued or a sale is approaching.
Charrette Law provides planning-related support to property owners, developers and investors seeking to understand the planning requirements affecting their projects. Assessing the existing permission, identifying the nature of a discrepancy and considering the available planning routes can help establish a clearer strategy for addressing the issue.
Depending on the circumstances, the next step may involve reviewing approved plans and conditions, exploring a retrospective application, considering an appropriate amendment or obtaining advice on planning enforcement.
Where formal enforcement action has been taken, owners should seek advice promptly because the relevant deadlines may limit their available options.
Contact Charrette Law to discuss the planning issues affecting your property and identify the appropriate next steps for your circumstances.
Frequently Asked Questions
What is a breach of planning permission?
A breach occurs when development requiring permission is carried out without it, or when development fails to comply with the terms or conditions of an existing permission. Whether a particular alteration constitutes a breach depends on the circumstances and applicable planning rules.
Can a planning permission breach be corrected?
Yes, in some cases. Possible options include applying for retrospective permission, seeking an appropriate amendment or modifying the development to bring it into compliance. The appropriate route depends on the nature of the breach and the planning merits of the proposal.
Can the council force me to demolish an unauthorised extension?
An authority may require removal or alteration of unauthorised development where formal enforcement action is justified. The precise requirements depend on the breach and the terms of any notice issued. Demolition is not an automatic consequence of every planning breach.
Is a planning permission breach a criminal offence?
The breach itself is not generally a criminal offence in the same way as failing to comply with an effective enforcement notice. However, certain breaches can lead to criminal liability where statutory requirements are not met, including non-compliance with relevant enforcement action. The specific legal consequences depend on the circumstances.
How long can the council take to investigate a planning breach?
There is no single investigation period that applies to every complaint. The time required can depend on the complexity of the case, the evidence available and the local planning authority’s procedures. The time limits governing enforcement action are separate from the time taken to investigate a suspected breach.
Can I sell a property with a planning permission breach?
A sale may still be possible, but the issue can raise questions for buyers, lenders and conveyancing professionals. The effect depends on the nature of the breach, the evidence available and whether it can be resolved or regularised. It is advisable to establish the position before marketing or completing a transaction.
Do planning enforcement rules differ across the UK?
Yes. Planning legislation and enforcement procedures differ between England, Wales, Scotland and Northern Ireland. This article focuses primarily on the legal framework in England, with relevant references to legislation that also applies in Wales. Property owners should check the rules applicable to the location of their development.
Conclusion
A planning permission breach does not always mean that a property project must be abandoned, but it should not be ignored. The right response depends on what has changed, whether further permission is available and whether the local planning authority has begun enforcement action.
By checking the approved plans, assessing the planning implications and choosing a resolution strategy based on the facts, property owners can make better-informed decisions and reduce the risk of unnecessary remedial costs.
For developers and homeowners, early advice can be particularly valuable where the breach affects a major investment, a property transaction or an ongoing construction programme.
Speak to Charrette Law about the planning considerations affecting your property and the options that may be available to address a suspected breach.
