Blog>Cost Guides>Skylight installation: Cost breakdown 2025
Last updated: 7 July 2025
Skylight installation: Cost breakdown 2025
Do you want to get more natural daylight in a room of your house? Installing a skylight can help to brighten up your home, improve ventilation and bring down the costs of lighting.
Whether it’s part of a renovation or a standalone project, this guide breaks down everything you need to know about skylight installation costs. Keep reading to learn more about the cost to install skylights in the UK.
Fast Facts
The average cost for skylight installation is around £1,000
To replace an existing skylight, the cost will be in the region of £650
For accurate prices, get quotes from at least three checked tradespeople who cover your area
How much does skylight installation cost in 2025?
Brighten up your home and boost ventilation with an average skylight installation cost of around £1,000.
To help you plan your budget, below are some estimated average skylight installation costs in the UK:
| Type of window | Unit | Cost (+VAT) |
|---|---|---|
| Roof dome small | Per project | £450 |
| Velux small | Per project | £550 |
| Skylight large | Per project | £700 |
| Roof dome large | Per project | £650 |
| Velux large | Per project | £800 |
| Install skylight with labour | Per project | £1,000 |
| Flat roof skylight cost | Per Item | £600 |
| Pyramid skylight cost | Per Item | £550 |
| Average skylight replacement cost | Per Item | £650 |
| Electric powered window | Per Item | £300 |
| Installation cost (skilled labourer) | Per hour | £25 |
| Installation cost (assistant labourer) | Per hour | £15 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
For accurate costs near you, we recommend getting quotes from at least three tradespeople offering skylight installation services.
Skylight installation costs in the UK
Skylights come in various styles, each offering different levels of light, airflow, and cost depending on their design and functionality.
Roof dome – A curved or domed skylight that allows light to enter from multiple angles: £450
Velux window installation cost – A branded, hinged roof window ideal for attics or stairwells that provides ventilation and thermal efficiency: £550 - £800
Skylight – A traditional roof window that maximises natural light in larger spaces: £700
Flat roof skylight – A sleek, flush-fitting skylight designed specifically for flat roof installations: £600
Pyramid skylight – A four-sided, raised skylight structure that adds architectural interest: £550
For guidance advice on which type of skylight is best for you and your home, enter your postcode below and find skylight fitters who cover your area:
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How much does skylight installation cost per day?
A skylight installer will typically charge a daily rate, with a skilled tradesperson costing the following on average:
Skilled skylight installer – £200 per day
Assistant labourer – £125 per day
Most installations require both, so it's worth factoring that into your calculations when planning your budget.
Average cost to replace a roof window
The average cost to replace a roof window is around £650, including supply and installation. Most replacements can be done from inside, but if external access is needed, scaffolding may increase the total cost.
A skylight installer typically charges around £25 per hour, with two workers usually completing the job in 4–6 hours.
Skylight installation cost: Job estimator tool
Use our job estimator tool below to help calculate the cost of installing a skylight.
Need help working out cost? Our job estimate tool calculates the costs for you.
Factors affecting the cost of installing a skylight
Skylight and roof window installation costs are determined by several factors. These include:
Type of skylight requested – Any bespoke requirements will increase the cost to install a skylight
Size of a skylight – Typically, the larger the skylight the more it will cost to install
Type of glass used – HR++ glass is generally more expensive
Roof type and slope – Complex or steep roofs may need more labour and safety equipment to complete the job
Ease of access – Poor accessibility will make the installation more complex and likely add to the total cost
Before getting a quote, make sure you know the size and type of skylight you need, what works for your roof, and whether you’re after any specific features or finishes.
Skylight installation cost estimate: Getting a quote
We recommend getting at least three quotes from checked skylight installers covering your local area to ensure you’re being offered fair, competitive prices.
Ask for a detailed breakdown of installation costs to make comparisons easier.
Our free quote request feature makes this simple – just post your job, and we’ll share it with checked tradespeople who operate in your area.
Skylight installation cost checklist
Before browsing the market for the perfect roof window or skylight, it’s important to consider the following:
Skylight installation is a relatively simple task but one more suited to a professional installer or checked tradesperson, as it can be hazardous
Roof skylight costs are determined by the price of the window or skylight and the scope of the work required
Roof window installation costs are often charged using a day rate. The average day rate of a skylight installer in the UK is £200 per day
Time taken will depend on the complexity of the task
Additional needs, such as scaffolding, will be charged separately
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Cost to install a skylight: FAQs
What’s the average cost to install a skylight?
On average, it costs £1,000 to install a skylight in the UK. The exact cost will depend on the number of skylights you install, the size of the skylight, and the design and style of the skylight. For example, larger skylights will require more material and labour which will increase the final cost. Complex installation requirements, such as difficulty accessing the roof, will also impact the final cost.
How long does it take to install a skylight UK?
On average, it takes between half a day and three days to install a skylight in the UK. The exact time will depend on the project scope. For example, a simple skylight replacement can be completed in a quicker time than installing a skylight for the first time. Structural altercations, internal finishing work and weather conditions can all impact the amount of time it takes to install a new skylight.
Do you need planning permission to install a skylight?
In most cases, you should not need planning permission to install a skylight. Depending on the skylights size and location, this can differ, For example, if you live in a conservation area, there will be different regulations to adhere to. Check your permitted development rights to understand the restrictions in your area. It’s important to remember that no matter where you live, you will need to comply with Building Regulations.
What does Velux window glass replacement cost?
Glass replacement for a Velux window is usually somewhere in the region of £100– depending on the window size and glazing type.
Prices may be higher for triple glazing or specialist glass, such as noise reduction or solar control.
Is putting a skylight in expensive?
The exact cost of installing a skylight depends on the skylight type, size, features and material, as these factors can influence the complexity of the installation. The expense also considers labour costs, which can vary depending on where you live and the installation requirements.
Is it worth having a skylight?
Installing a skylight in the UK is generally considered to be worth it. This is because it increases the amount of natural light in your home and helps to improve energy efficiency and ventilation in and around your home. Beyond this, its stylistic and visual impact can significantly improve the aesthetics of your home, contributing to increased value and appeal to future buyers.
Do skylights add value to your home?
Generally speaking, skylights do add value to your home, enhancing the aesthetic appeal of the property while increasing natural light and ventilation. Skylights help to create a focal point in the home, creating a diverse, unique space that’s both functional and livable.
When’s the best time to install a skylight in the UK?
It’s a good idea to install a skylight in the summer. This is because temperatures are warmer, and rainfall is less likely. This in turn reduces the risk of weather-related delays, as rain, wind and cold conditions can delay installation and increase labour costs.
How much should I pay to get a skylight installed?
On average, you should aim to spend between £1,000 on skylight installation. However, the exact installation costs you can expect to pay vary greatly depending on where you live and the project complexity.
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