If you’re planning work on your home or land, one of the first questions to ask is: Do I need planning permission? The answer depends on what you’re doing, where you live, and whether the work falls under permitted development rights or requires formal consent.
In this article, we’ll explain when planning permission is needed, what exceptions apply, and how to check before you begin.
What Is Planning Permission?
Planning permission is the approval you need from your local planning authority (LPA) to carry out certain types of development. This includes building, altering, or changing the use of land or buildings.
Without it, you risk having to undo the work, face enforcement action, or run into problems when selling the property later.
When You Might Not Need Planning Permission
Some works are allowed without applying for full planning permission under what’s known as permitted development rights. These rights cover certain improvements to houses, such as:
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Rear and side extensions (within size limits)
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Loft conversions
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Porches
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Solar panels
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Outbuildings like sheds or garden offices (subject to height and placement rules)
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Internal alterations
However, there are restrictions. For example, permitted development doesn’t usually apply if:
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Your property is in a conservation area, national park, or Area of Outstanding Natural Beauty (AONB)
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Your building is listed
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Previous planning conditions have removed your permitted development rights
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The proposed works exceed the permitted size or height limits
It’s always safest to check before starting — what seems minor to you may still require permission.
When Planning Permission Is Required
You will usually need to apply for planning permission if:
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You’re building a new home
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You’re extending a property beyond the permitted development limits
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You want to build a large outbuilding or annexe
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You plan to divide a property into flats
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You want to change the use of a building (e.g. residential to commercial)
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You’re making significant alterations to a listed building
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Your property is in a designated area with tighter rules
Even minor changes like adding a driveway, replacing windows, or building a boundary wall can sometimes need permission in certain areas.
How to Check
To find out whether your specific project needs permission:
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Check your local council’s website – most have interactive guides
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Speak to your planning authority
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Consult a planning consultant – we can review your plans and advise clearly
Sometimes, even if permission isn’t needed, it’s wise to apply for a Lawful Development Certificate (LDC) to confirm that your project is legally permitted.
Need Help?
At Angharad Williams Planning, we take the guesswork out of the process. We can assess your proposal, explain your options, and prepare any applications needed — whether it’s full planning permission or just a certificate of lawfulness.
Get in touch if you’re unsure — it’s always better to check than to be caught out.
