Do I Need Planning Permission? UK Homeowner Guide 2026

Permitted development (PD) rights allow homeowners to carry out certain building work without needing to apply for planning permission. These rights are granted by the government through the Town and Country Planning (General Permitted Development) Order, and they cover a wide range of common home improvements.

The key principle is that permitted development has limits — on size, height, position, and materials. If your project falls within these limits, you can proceed without a planning application. If it exceeds any limit, you need full planning permission.

It's important to note that PD rights only apply to houses, not flats or maisonettes. If your property has had its PD rights removed (through a condition on the original planning permission, or an Article 4 direction in your area), you'll need planning permission for work that would otherwise be permitted. Properties in conservation areas, National Parks, AONBs, and World Heritage Sites have more restricted PD rights.

Several types of work always require planning permission, regardless of permitted development rights. If your project falls into any of these categories, you must apply to your local planning authority before starting work.

Planning applications in England are submitted through the Planning Portal (planningportal.co.uk). The process is largely digital, though some authorities still accept paper applications. You'll need architectural drawings (existing and proposed plans, elevations, and a site plan), a completed application form, the correct fee, and various supporting documents depending on your project.

The standard householder application fee in England is £258 (2026). The planning authority has 8 weeks to decide a standard householder application, though extensions are common. You'll receive a decision notice granting permission (possibly with conditions), refusing permission (with reasons), or requesting further information.

Before submitting a formal application, consider requesting pre-application advice from your local authority. This typically costs £50–£300 and gives you an informal opinion on whether your project is likely to receive permission. It can save significant time and money by identifying issues early, and it gives you the chance to modify your design before submitting formally.

If your application is refused, you can appeal to the Planning Inspectorate within 6 months. Appeals are free but can take 6–12 months to determine. Alternatively, you can modify your design to address the reasons for refusal and submit a new application — there's no fee for a resubmission within 12 months of a refusal on the same site.

Planning permission and Building Regulations are two separate systems with different purposes. Planning permission controls what you can build and where — it's about the impact on neighbours and the local area. Building Regulations control how you build — ensuring structural safety, fire resistance, energy efficiency, and accessibility.

You may need one, both, or neither for your project. A small rear extension might be permitted development (no planning permission needed) but will still require Building Regulations approval. Changing the use of a room from a bedroom to a bathroom doesn't need planning permission or Building Regulations. A new build needs both.

Building Regulations approval is obtained either through your local authority Building Control team or a private approved inspector. The inspector visits at key stages (foundations, drainage, structural, completion) and issues a completion certificate when satisfied. This certificate is essential — mortgage lenders and buyers will ask for it, and its absence can block a sale.

The most expensive mistake is starting work without the required planning permission. If the council discovers unauthorised development, they can issue an enforcement notice requiring you to demolish the work or restore the property to its original state — at your cost. While retrospective planning applications are possible, approval is not guaranteed, and the process is stressful and expensive.

Another common mistake is assuming that permitted development rights automatically apply to your property. If your home was built with a condition removing PD rights (common on new-build estates), or if an Article 4 direction applies in your area, you may need planning permission for work that would normally be permitted. Check with your local authority before assuming.

Many homeowners also confuse planning permission with Building Regulations. Getting planning permission doesn't mean your building meets safety standards — that's what Building Regulations are for. Similarly, having no planning requirement doesn't exempt you from Building Regulations. The two systems are independent, and you need to satisfy both where applicable.

Finally, don't forget about the Party Wall Act. If you're building on or near a shared boundary (within 3m for foundations, or on the boundary line for walls), you have a legal obligation to notify affected neighbours. This is separate from both planning and Building Regulations and is frequently overlooked.