Planning permission can feel like one of the most daunting parts of any building project. Whether you’re considering an extension or renovation, understanding how to prepare properly can save time, reduce stress and set your project up for success.
From a builder’s perspective, the strongest planning applications are always the ones built on clarity, preparation and realistic expectations.
Here’s our guide to getting ready before you submit.
1. Understand whether you need planning permission
Not every project requires full planning permission. Some extensions and alterations fall under Permitted Development, but this depends on factors such as:
- The size and height of the proposed works
- The position of the extension
- Whether the property is listed or in a conservation area
Before moving forward, it’s worth confirming this with your local authority or seeking professional advice. Even when planning isn’t required, we often recommend obtaining a Lawful Development Certificate for peace of mind and future property value.
2. Define your vision clearly
Before drawings are created or applications submitted, take time to define what you want to achieve.
Ask yourself:
- How do you want the space to work day-to-day?
- What problems are you trying to solve?
- How will the new space connect to the existing home?
Clear goals make it easier for architects, planners and builders to create proposals that are both practical and planning-friendly.
3. Work with the right professionals
A successful planning application is rarely a solo effort. Depending on the project, you may need:
- An architect or architectural technologist
- A planning consultant
- A structural engineer
- Your builder (us!)
Early collaboration helps ensure designs are realistic, compliant and cost-conscious. From our experience, involving your builder at this stage can also help avoid designs that look great on paper but are impractical or costly to build.
4. Prepare accurate drawings and supporting documents
Local authorities require clear and detailed information. Typically, this includes:
- Existing and proposed floor plans
- Elevations and sections
- Site and location plans
- Design and access statements (where required)
Incomplete or unclear submissions are one of the most common causes of delays, so accuracy here is key.
5. Consider your neighbours early
Neighbour objections can impact planning decisions. We always advise homeowners to:
- Inform neighbours early about proposed works
- Share drawings if appropriate
- Address concerns around privacy, light and boundaries
A friendly conversation can often prevent issues later in the process.
6. Be realistic about timescales
Planning decisions are not instant. In most cases:
- Householder applications take around eight weeks
- More complex applications may take longer
Allowing time for revisions, questions from planners or additional information requests will help you plan more calmly and avoid rushed decisions.
7. Set a sensible budget
Planning is just one part of the overall project. Before submitting, it’s important to:
- Understand likely construction costs
- Factor in professional fees
- Include a contingency for unexpected changes
This ensures the approved design is achievable and avoids costly redesigns later.
8. Prepare for conditions and next steps
Even when planning permission is granted, it often comes with conditions that must be discharged before work begins. These may include:
- Material approvals
- Construction method statements
- Ecology or drainage details
Understanding these early helps the build phase run smoothly.
Final thoughts
A well-prepared planning application lays the foundations for a successful build. When time is taken to plan carefully, involve the right professionals, and think practically, the entire project benefits from approval through to completion.
If you’re considering a project and would like advice from a builder’s perspective, we’re always happy to help guide you through the early stages and ensure your plans are realistic, buildable and ready to move forward.