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How Long Does Planning Permission Last? Timelines, Solutions, and Expert Advice


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When you’re planning a major home improvement or new construction project, understanding how long planning permission lasts can make a big difference in keeping your project on track. If you’re uncertain about the rules, deadlines, and options around planning permission, don’t worry—you’re not alone. This guide will explain everything from how long each type of planning permission is valid to what steps you can take if your permission is about to expire. Whether you’re tackling a large-scale build or a smaller renovation, this essential guide will help you navigate planning permissions with confidence.


Table of Contents



Introduction


Planning permission is a legal requirement for many construction projects, from new builds and extensive renovations to specific property modifications. The duration of planning permission varies depending on the type, and you must adhere to specific deadlines to avoid reapplying or risking project delays. In this article, we’ll answer your key questions about planning permission validity, from start dates and renewal options to strategies for expediting the process. Understanding these timelines and knowing what steps to take can help you avoid unnecessary complications and get the most out of your planning permission.


How Long Does Planning Permission Remain Last?


In general, planning permission is valid for three years from the date of approval. This means that you must start construction work within this period, or your permission may lapse, requiring you to reapply. Local planning authorities in the UK adhere to this three-year guideline, but different types of planning permission may have slightly different timelines. It’s crucial to be aware of the specific type of permission you have and track the date your application was approved to avoid complications later on.


Keep in mind that “starting construction” doesn’t necessarily mean completing the entire project. However, failing to make significant progress could invalidate your permission. This initial start within the allotted time frame is the critical step to maintaining your permission validity.


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Understanding Full and Householder Planning Permission Duration


Full planning permission applies to most substantial developments, including large renovations, commercial builds, and new residential projects. Householder planning permission, on the other hand, is a type of permission specific to smaller residential projects like building extensions or loft conversions. Both types of permission are valid for three years from the date granted, with the same rule that construction must be started within this timeframe.


If you have householder planning permission for a minor project, such as a garage conversion or a porch, the same rules apply: you’ll need to begin the work within three years to avoid reapplying. Since reapplying for even small projects involves a time investment, staying within the initial time frame is often the best option.


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Outline Planning Permission: What’s the Timespan?


Outline planning permission is commonly used when a developer wants to establish if a project is viable before investing in detailed plans. It’s frequently used in larger developments and serves as a way to get approval for the general principles of a project, such as the size and nature of the construction. Outline planning permission typically also has a three-year validity period, during which you must submit a “reserved matters” application to specify detailed aspects like design, landscaping, and access.


Once the reserved matters application is approved, you’ll generally have another three-year period to start the actual construction. This means that for an outline planning permission, you could potentially have up to six years to complete the planning and initiate construction, though you’ll still need to work within each phase’s specific deadlines to keep the project moving forward.


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Defining the Start of Construction for Planning Purposes


It’s essential to understand what constitutes “starting” a project, as a simple groundbreaking ceremony won’t always suffice. For planning permission, substantial initial work must be completed to secure the validity of your permission. Examples of acceptable starting work include laying foundations, installing drainage systems, and even digging significant trenches. Minor activities, such as putting up a fence or storing materials on-site, typically do not qualify as a legitimate start.


Because defining an official “start” can sometimes be unclear, consult with your local planning authority if you’re uncertain about whether your initial work qualifies. The authority can offer guidance on what is needed to ensure that your project has legally commenced within the permission period.


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Dealing with Extended Project Timelines


Construction projects are notoriously prone to delays, whether from weather issues, supply shortages, or budget constraints. If you anticipate that your project timeline will exceed the initial three-year period, you’ll want to ensure you complete initial work early on to meet the planning requirements. This approach can help avoid complications with expiring permissions, allowing you to complete the project even if unforeseen delays occur.


In some cases, working with a qualified project manager or contractor can be beneficial in maintaining an efficient timeline. They can help plan around potential delays and ensure that essential stages are completed on time to avoid letting the permission expire.


Options for Extending or Renewing Planning Permission


Until recent legislative changes, it was possible to extend planning permissions through a simplified renewal process. However, this renewal option has largely been removed, meaning that if your planning permission period expires, you’ll typically need to submit a fresh application to your local planning authority.


If unexpected delays are impacting your project, consider reaching out to your local authority to see if they offer any flexibility for reapplying or a fast-tracked application in special cases. Some authorities might be able to offer guidance or a more streamlined reapplication if you can demonstrate that the delays were beyond your control.


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Steps to Take if Your Planning Permission Expires


If you fail to start construction before the planning permission expires, your project is effectively “paused” until you apply again. You’ll need to go through the same application steps as you did initially, including submitting detailed plans and going through the review and approval process with the planning authority. This process can sometimes be quicker for a previously approved project, as the authority is familiar with the plans, but there are no guarantees.


To avoid added stress, plan ahead and consider starting essential construction as early as possible to ensure you meet the initial requirements without needing to reapply.


How to Reapply for Expired Planning Permission


Reapplying for expired planning permission can feel daunting, but it’s not all bad news. While it requires a fresh submission of forms, plans, and documentation, your project’s prior approval history might work in your favour. Reapplication often has a higher success rate if the project details remain the same or are only slightly modified, as the planning authority is familiar with the original approval.


If your original permission included public consultations, be prepared to go through this process again. Any changes in local planning regulations or policies since your initial application could affect the decision, so reviewing any updated policies or guidelines before reapplying is wise.


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Tips to Expedite the Planning Permission Process


Getting planning permission can be time-consuming, but following these steps can help speed up the process:


  1. Submit Accurate Documentation: Double-check that every form is complete and correct. Missing information is one of the most common causes of delays.

  2. Engage with Local Authorities Early: If your project has unique elements, reach out to your local planning authority for guidance early in the process.

  3. Use Pre-Application Services: Many planning authorities offer pre-application services that allow you to discuss your project before formally applying, helping address potential issues.

  4. Hire Qualified Professionals: An experienced architect or planning consultant can help create a strong application, increasing the likelihood of fast approval.

  5. Be Prepared for Site Visits: Some planning authorities may require a visit to your property. Keep the site accessible and organised for inspectors.


How HiiGuru Can Support Your Home Project


If navigating the planning permission process feels overwhelming, consider turning to HiiGuru, a platform that connects homeowners with experienced professionals, including architects, structural engineers, and builders. HiiGuru’s experts can provide valuable insights and advice, from preparing planning applications to ensuring construction complies with regulations. By partnering with HiiGuru, you gain access to a network of specialists who understand local planning guidelines and can help you tackle any challenges your project faces, reducing stress and saving time.


Our Final Thoughts


Understanding how long planning permission lasts is essential for keeping your project moving smoothly and avoiding costly reapplications. From starting your project on time to exploring reapplication options, following these guidelines will help you stay on track. Remember that while planning permission can feel like a maze, there are resources and experts available to assist you, from your local planning authority to platforms like HiiGuru. With the right support, you’ll be on your way to making your dream project a reality.


Do you need help with planning permission? Book our Advice on Planning service. Transforming your home into a space you love shouldn't be a daunting task. With HiiGuru you can save time, avoid costly mistakes and bring your goals to life with experts by your side.

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