Much of the planning advice online is written for England. If your property is in Wales, the system is different, because planning is devolved to the Welsh Government. This guide explains how it works in practice.
This is general information and rules change. The Planning Portal's own extension guidance is mainly for England. Confirm requirements for your address with your local planning authority, such as Newport City Council, before you build.
Who decides?
Your local planning authority (for Newport, Newport City Council) decides applications under Welsh legislation and national policy set by the Welsh Government. Permitted development is set out in a Welsh order that differs in some respects from the English one.
Permitted development in Wales
Many smaller extensions can be built without a planning application if they fall within permitted development limits. The Welsh rules cover matters such as:
- the depth and height of the extension
- how close it is to boundaries
- materials
- whether it is forward of the front of the house
- volume allowances, which play a more significant role in Wales than in England for some types of extension
Because Welsh limits are not identical to the English ones, do not rely on guidance such as the English "larger home extension" scheme. Check the current Welsh householder guidance and ask the council.
When you will probably need permission
- Flats and maisonettes
- Listed buildings and many conservation areas
- Properties with permitted development removed by a condition or Article 4 direction
- Extensions beyond permitted development limits, or at the front
- Many two-storey extensions
Some areas of Newport, for example around Caerleon, are conservation areas, so check early.
How to apply
- Prepare scaled drawings of existing and proposed plans and elevations, a location plan and a block plan.
- Apply through the Planning Portal or directly with the council, completing the householder application form and paying the fee.
- The council consults neighbours and relevant bodies.
- A decision is normally targeted within eight weeks for householder applications, although some take longer.
- If approved, check and discharge any conditions before starting.
Lawful Development Certificate
If you think your project is permitted development, an optional Lawful Development Certificate gives written proof. This helps when you sell your home.
Other approvals
- Building regulations are required for almost every extension and are separate from planning
- Party wall notices apply under the Party Wall etc. Act 1996 in Wales as well as England
- In some places, other consents, such as for trees or protected habitats, may apply
For the wider comparison, see Building in Wales vs England, and for the general overview, read do I need planning permission for a house extension?
Timeline and cost
Add planning to your programme: see how long an extension takes and extension costs.
Help from a local builder
Abron Contracting is based in Newport and is familiar with the local process. We can discuss your extension, recommend design professionals and provide a quote. Contact us or call 01633379170.
Frequently asked questions
Do I need planning permission for an extension in Wales?
Sometimes. Many smaller extensions fall under Welsh permitted development, but limits and exceptions apply, so check with your council.
Are Welsh permitted development rules the same as England?
No. They are set separately and differ in some respects, including how volume limits apply.
How long does a planning application take in Wales?
Councils aim to decide householder applications within about eight weeks.
Where do I apply for planning permission in Newport?
Through the Planning Portal or directly with Newport City Council.
What if I built without permission?
The council may take enforcement action and it can cause problems when selling, so check first.
