Velux Loft Conversions

What is a Velux Loft Conversion?

A Velux loft conversion is a type of loft conversion that transforms your existing roof space into a functional room without altering the roofline. Instead of extending the structure, it uses Velux roof windows installed flush with the slope of your roof to bring in natural light and ventilation.

Velux conversions are one of the simplest and most cost-effective loft conversion options in the UK, making them ideal for homes with sufficient existing loft height and a desire for minimal disruption during construction.

Dormer loft conversion exterior view in Kent

Is a Velux Loft Conversion the Right Choice for Your Home?

A Velux loft conversion is ideal for homeowners looking to add light and space without altering the shape of their existing roof. Because these conversions use Velux roof windows fitted flush into the roofline, they’re often quicker, more cost-effective, and require fewer structural changes compared to other types of loft conversions.

If your loft already has good head height, this style may be the perfect fit. Velux conversions are especially well suited to detached and semi-detached homes with an open roof pitch.

Not sure if your property is suitable? Contact our team or learn more about the types of loft conversions we offer to explore your options.

How much does a Velux Loft conversion cost?

A Velux loft conversion in Kent or South East London typically costs between £20,000 and £30,000, making it one of the most cost-effective ways to add extra living space to your home. Since it doesn’t require major structural changes—like altering the roof or building external extensions—it’s quicker to complete and more budget-friendly than other loft conversion types.

Costs can vary depending on factors such as:

-- The size and layout of your existing loft

-- The number and type of Velux windows installed

-- Whether you're adding plumbing for a bathroom or en-suite

-- Insulation, flooring, and other finishing touches

At Loft & Build, we provide free quotes and expert guidance to help you plan your Velux conversion within your budget—without compromising on quality or comfort.

Do you need planning permission for a Velux Loft conversion?

In most cases, Velux loft conversions in Kent and South East London fall under permitted development rights, meaning you typically won’t need to apply for planning permission. Since Velux windows are installed flush with the existing roofline and don’t alter the roof’s structure, they’re considered one of the least invasive types of loft conversions.

However, planning permission may still be required in certain circumstances, such as:

-- If your home is in a conservation area or Area of Outstanding Natural Beauty.

-- If the Velux windows are installed on the front-facing roof slope (the side visible from the road), which may require permission under UK planning rules.

-- If your property has already been extended beyond permitted development limits.

-- if you live in a flat or maisonette, which aren't eligible for permitted development rights.

At Loft & Build, we always check local planning policies on your behalf before starting your project. If an application is needed, we’ll handle it from start to finish - ensuring your Velux loft conversion meets all legal and structural requirements.

Not quite what you're looking for?

Explore Our Other Loft Conversion Options

At Loft & Build, we offer a range of loft conversion styles to suit every home and budget in Kent and South East London. If a dormer conversion isn’t quite right for your property, consider our other popular options:

Hip to Gable Loft Conversions – Ideal for homes with a hipped roof, expanding space by extending the roof’s side.
Dormer Loft Conversions – A versatile option that extends vertically from the roof, adding usable space and full-height windows.
Mansard Loft Conversions – Perfect for creating maximum headroom and floor space with a steeply pitched rear roof.

Frequently Asked Questions

Do I need planning permission for a Velux loft conversion?

In most cases, Velux loft conversions fall under permitted development rights, meaning you won’t need planning permission - especially if no structural changes are made to the roofline. However, if your property is in a conservation area or you're planning major alterations, planning approval may be required.

How long does a Velux loft conversion take?

On average, a Velux loft conversion takes around 4 to 6 weeks from start to finish. This includes all necessary insulation, flooring, lighting, and finishes. The timeline may vary depending on your property and any added features like plumbing or bespoke storage.

Is my home suitable for a Velux loft conversion?

Most homes with a loft space and a minimum head height of 2.2 metres are suitable for a Velux conversion. If your loft is already used for storage and has decent height and structure, a Velux project may be the perfect fit. We offer free surveys across Kent and South East London to assess your property.

Will a Velux loft conversion add value to my home?

Yes! A well-designed Velux loft conversion can increase your home’s value by up to 20%, depending on your location and the quality of the work. It’s a smart investment, especially in areas like Kent and South East London where space is at a premium.

What’s the difference between a Velux and Dormer loft conversion?

A Velux loft conversion keeps the existing roof structure and simply adds roof windows for natural light and ventilation. In contrast, a dormer loft conversion extends the roof to create extra headroom and floor space.

What Our Clients Have To Say

"Very happy with the speed and standard of work. Kevin has a good team of experienced people. Been recommending him to friends. Price was good too. Loft conversion and garage extension."

- Brian Lydford, Tonbridge, Kent

"Can’t be any happier with the work done by Loft & Build Ltd skilled , well mannered and polite boys especially Harry , who is a great talented young man. Everything was done in time which makes them very reliable. I will definitely recommend to any of my friends or family!!!."

- Joanna Zazula

"Had Kev do my loft conversion, Was a great experience from start to finish. His whole team went above and beyond to get the work done and any problems rectified without problem. Recommended to all I know and will definitely use Kev and the team again."

- Wayne Mcgarry

"Kev and his team have just completed our loft extension. From the initial stage Kev was very professional and understanding with great communication. We are so pleased with the quality and I would fully recommend Kev and his team at Loft and Build. Amazing service."

- Mike Greensted

Loft Conversion Specialists in Kent & South East London

We proudly deliver high-quality loft conversions throughout Kent and South East London. Whether you’re in Maidstone, Tonbridge, Bromley, or anywhere nearby, our expert team is ready to help transform your home.

Some of the towns and areas we serve include:

Medway:

Kent:

South East London:

Don’t see your town? Contact us — we may still cover your area!