One of the most common questions we receive from homeowners across the UK is: "Do I need planning permission for my home extension?" The answer isn't always straightforward, but understanding the basics can save you time, money, and potential headaches down the line.
In many cases, you can extend your home without needing formal planning permission, thanks to "permitted development rights." These are a set of rules that allow certain building works and changes to be carried out without having to submit a planning application.
However, these rights come with specific conditions and limitations. For single-storey rear extensions, you can typically extend up to 6 metres (for detached houses) or 3 metres (for terraced or semi-detached houses) from the rear wall. For two-storey extensions, the limit is generally 3 metres for detached properties and not permitted under standard rights for terraced or semi-detached homes.
There are several scenarios where planning permission is always required:
Important Note
Permitted development rights can be removed by local planning authorities in certain areas, particularly conservation areas. Always check with your local council before proceeding.
Even if your extension falls within permitted development rights, you may still need to apply for "prior approval" from your local planning authority. This is a lighter-touch process than full planning permission and typically focuses on specific aspects such as the design, external appearance, and impact on neighbouring properties.
The prior approval process usually takes around 6 weeks, and it's advisable to wait for approval before starting work. At Dorizel Construction, we can handle this entire process for you, ensuring all paperwork is correctly submitted and liaising with planning officers on your behalf.
It's worth noting that planning rules can vary slightly across England, Wales, and Scotland. While the general principles remain similar, there may be local variations or additional restrictions in certain areas. Your local planning authority's website is an excellent resource for understanding the specific rules that apply to your property.
We work with homeowners across all regions—from Manchester and Leeds in the North, to London and Brighton in the South, Norwich and Cambridge in the East, and Bristol and Birmingham in the West—and our team is well-versed in regional planning requirements.
It's crucial to understand that planning permission and building regulations are two separate things. Even if you don't need planning permission, you'll almost certainly need building regulations approval for any extension work.
Building regulations cover structural integrity, fire safety, ventilation, insulation, and other technical aspects. These ensure your extension is safe, energy-efficient, and meets current building standards. We handle all building regulations applications as part of our service.
Before proceeding with any extension project, we always recommend having a professional assessment. During our free site survey, we'll evaluate your property, discuss your plans, and advise on whether planning permission or prior approval is needed. We'll also check for any other considerations, such as building regulations approval, party wall agreements, and local restrictions.
Remember: starting work without the necessary permissions can result in enforcement action from your local authority, potentially requiring you to remove the extension or make costly modifications. It's always better to check first and proceed with confidence.