Planning permission is a critical step in the process of developing or modifying property.
Whether you’re a homeowner looking to build an extension or a developer planning a new project, understanding the duration of planning permission is essential.
This article aims to answer the question, “How long does planning permission last?” and provides key insights into the related aspects of planning permission duration.
What is Planning Permission?

Planning permission is the formal approval from a local authority required for building or altering structures.
It ensures that any proposed development complies with local planning policies and regulations. The process involves submitting detailed plans and may require consultations with various stakeholders.
How Long Does Planning Permission Last?
Standard Duration
In most cases, planning permission lasts for three years from the date it is granted. This means you have a three-year window to start your development.
If you do not begin work within this period, the planning permission will expire, and you will need to reapply.
Outline Planning Permission
Outline planning permission is different from full planning permission. It gives an initial approval for a development proposal but does not include detailed plans.
Once outline permission is granted, you have three years to submit the reserved matters, which include detailed plans.
After the reserved matters are approved, you generally have another two years to start the development.
Listed Building Consent
If your project involves a listed building, you will need listed building consent in addition to planning permission.
The duration of this consent can vary, but it often aligns with the standard three-year period for planning permission.
Does Planning Permission Expire?
Yes, planning permission does expire. If you do not commence the development within the specified timeframe, the permission will lapse.
It’s crucial to be aware of this timeline to avoid the need to reapply, which can be both time-consuming and costly.
Extensions and Renewals
If you are unable to start your development within the original timeframe, you may apply for an extension.
However, the rules and availability of extensions can vary by local authority. It’s advisable to check with your local planning department well before your planning permission is due to expire.
Material Operations
To prevent planning permission from expiring, you must begin “material operations” on the site.
Material operations can include:
- Digging foundations
- Laying drainage pipes
- Demolishing existing buildings
Starting any of these activities can be sufficient to keep your planning permission active, even if the main construction work is delayed.
Factors Influencing Planning Permission Duration
Local Authority Policies
Local authorities may have specific policies that influence the duration and conditions of planning permission.
It’s essential to review these policies and consult with planning officers to understand any unique requirements or restrictions.
Type of Development
The nature and scale of the development can also impact the duration of planning permission.
Larger, more complex projects may require phased planning permissions, each with its own timeline and conditions.
Legal Challenges
Legal challenges or objections from neighbors and other stakeholders can delay the commencement of your project.
While these do not directly affect the duration of planning permission, they can impact your ability to start within the permitted timeframe.
How to Apply for Planning Permission
Applying for planning permission involves several steps:
1. Pre-Application Consultation
Before submitting your application, it’s advisable to consult with your local planning authority. This pre-application consultation can help identify potential issues and streamline the approval process.
2. Submit Application
Submit a detailed application that includes site plans, elevations, and other required documentation. You may also need to provide environmental impact assessments, heritage statements, and other supporting documents.
3. Public Consultation
Once your application is submitted, it will be subject to a public consultation period. Neighbors and other stakeholders can review and comment on your proposal.
4. Decision
The local planning authority will review your application and consider any comments received during the public consultation.
They will then decide to grant or refuse planning permission.
Tips for Managing Planning Permission Duration
Start Early
Begin the planning process as early as possible to account for potential delays and complications.
This can help ensure that you have ample time to commence your development within the permitted timeframe.
Keep Records
Maintain detailed records of all communications, approvals, and material operations.
This documentation can be invaluable if you need to prove that you have started work within the required period.
Monitor Expiry Dates
Regularly review the expiry dates of your planning permissions and any associated consents.
Set reminders to ensure that you do not miss critical deadlines.
Engage Professionals
Consider hiring planning consultants, architects, and legal advisors to assist with the planning process.
Their expertise can help navigate complex regulations and optimize your chances of securing and maintaining planning permission.
Conclusion
Understanding the duration of planning permission is essential for anyone involved in property development.
Standard planning permission typically lasts for three years, but various factors can influence this timeframe.
By starting early, keeping detailed records, and staying informed about local policies, you can effectively manage your planning permissions and ensure the successful completion of your projects.
In summary, knowing how long planning permission lasts and taking proactive steps to manage it can save time, money, and stress in your development journey.









