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Do You Usually Need Planning Permission for a Skylight?
Most skylights on houses don’t need planning permission because they’re often classed as permitted development. This means you can make certain small changes to your home without needing to apply, as long as you follow the rules. These rules are there to make sure any changes are in keeping with the building and its surroundings.
When Planning Permission Might Be Required
There are some situations where you might need planning permission for a skylight. For example, if the skylight sticks out more than 150 mm from the roof, or if it’s higher than the highest part of the roof, it won’t count as permitted development.
You’ll also need permission if your home is in a conservation area, a national park, or is a listed building. These places have stricter rules to protect their appearance and history.
In short, if the skylight changes the shape of the roof too much or if your home is in a protected area, you may need to apply.
Building Regulations
Even if you don’t need planning permission, your skylight still has to meet building regulations. These are rules that make sure any work done is safe and meets current standards.
For a skylight, this means checking things like how strong the roof is, whether the new window will keep out rain and wind, and if it helps with insulation. If the skylight can be opened, it might also need to meet rules about ventilation or emergency escape, depending on where it’s placed.
A registered installer can usually make sure the work meets these rules and give you a certificate once the job is done.
Flats and Leasehold Properties
If you live in a flat or a leasehold property, the rules are a bit different. Flats don’t have permitted development rights, so you’re more likely to need planning permission.
You’ll also need to check your lease. Many leases require you to get permission from the freeholder before making any changes to the roof or structure of the building. This applies even if the work wouldn’t need planning permission in a normal house.
It’s a good idea to speak to both your local council and your freeholder before making any plans.
How to Check or Apply
To find out if you require planning permission, start by contacting your local planning authority. They can tell you what rules apply to your home and area.
You can also check the Planning Portal website, which has guidance on permitted development and building regulations.
If you do need permission, you’ll need to submit an application with drawings and details of the work. This can usually be done online.
If you're unsure about the process, a builder, or architect with experience in this kind of work can help guide you through it and make sure everything is done properly.
Ready to add a skylight? We can help you choose the right product and guide you through what to consider before installation. You can view our range to see what suits your space or get in touch if you’d like some friendly advice.
Ready to Brighten Your Home?
Adding a skylight can make a big difference to your home, bringing in more light and fresh air. In most cases, you won’t need planning permission if you follow the permitted development rules. But there are exceptions, especially for flats, leasehold properties, or homes in protected areas.
Always check before starting any work. A quick call to your local council or a visit to the Planning Portal can save you time and trouble later on.
Planning your skylight project? We design and supply roof windows directly to homeowners, so you get expert support from the start. If you’re thinking about your next steps, view our range or get in touch, we’re happy to help.