A skylight is one of the simplest ways to transform a dark loft, kitchen, or landing without extending the building. It brings in natural light from above rather than from the side, which can make a real difference in rooms that a normal window cannot reach.
Skylight, roof window, or rooflight: what’s the difference
These terms are often used interchangeably, but there is a loose distinction. A roof window is typically openable and fitted within the plane of a pitched roof, at a height a person can reach and use like a regular window. A rooflight or skylight more broadly covers any glazed unit set into a roof, including fixed, non-opening designs and units built for flat roofs. In everyday use, most homeowners simply call all of them skylights.
Types of skylight
Fixed skylights
These do not open. They are generally the cheapest option and are a good fit for spaces that just need more light, such as a hallway or stairwell, rather than ventilation.
Opening roof windows
These can be opened manually with a handle or pole, or electrically with a motor and switch, sometimes including a remote control. Electric models cost more but are useful for hard to reach locations, such as a steep loft conversion roof.
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Flat roof skylights
Designed specifically to sit flush on a flat roof rather than a sloped one, these are common on kitchen extensions and are often finished with a frameless look for a more modern appearance.
Roof lanterns
A raised, multi-sided glazed structure, often pyramid or box shaped, popular on larger kitchen extensions where a bigger, more dramatic source of light is wanted rather than a single flat pane.
Solar powered skylights
These use a small solar panel to power the opening mechanism, often paired with a rain sensor that automatically closes the window if it starts raining, useful for a skylight that is otherwise difficult to reach.
Typical UK cost by type
| Skylight type | Typical cost range |
|---|---|
| Small fixed skylight | £600 to £850 |
| Standard opening roof window | £800 to £1,500 |
| Electric or solar powered roof window | £1,250 to £4,000 |
| Bespoke skylight or roof lantern | £1,750 to £4,000 or more |
Most standard installations take one to two days of labour for two people, and the window itself usually makes up the majority of the total cost rather than the fitting work. For general roof costing context, see our gable roof cost guide.
What affects the price
- Glass specification. Better insulated glass with special coatings costs more but performs better and can reduce heating costs over time
- Roof type and pitch. Flat roofs and steep or complex pitched roofs generally need more labour and support framing
- Access. Difficult to reach roofs may need scaffolding, which adds to the total cost
- Size and number of units. Larger skylights and multiple installations naturally increase both material and labour cost
Do skylights need planning permission
Most skylight installations count as permitted development in the UK and do not need planning permission. The main exceptions are properties that are listed buildings or in a conservation area, where a roof lantern or more prominent alteration may need approval. Always check with your local council before committing to a design if your property falls into either category.
Benefits worth knowing
Beyond the obvious extra light, skylights can genuinely reduce how much artificial lighting a room needs during the day, and the Energy Saving Trust highlights daylight as one practical factor in reducing a home’s overall energy use. Opening roof windows also help with ventilation, particularly useful in loft conversions and bathrooms where airflow can otherwise be limited.
Frequently asked questions
How much does a basic skylight cost to install in the UK?
A small fixed skylight typically starts around £600 to £850 including installation, while a standard opening roof window usually falls between £800 and £1,500.
Do I need an electrician to install an electric skylight?
Yes, electric or solar powered opening mechanisms involve wiring or motor integration that should be handled by a qualified installer as part of the job.
Can any roof have a skylight fitted?
Most pitched and flat roofs can accommodate a skylight, though roof structure, pitch, and any existing damage should be checked first. A roofer can confirm what is suitable for your specific roof.
Are skylights a common cause of roof leaks?
They can be if poorly installed or if the surrounding flashing fails over time, which is why correct fitting and periodic checks matter. Our guide on roof flashing covers how flashing around junctions like skylights is meant to work.
This guide is independent editorial content. It is not sponsored.
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