What is a Velux Loft Conversion? Trust Powerpilar to Make Conversions Easy

by | Sep 21, 2023 | Loft Conversion | 0 comments

Have you ever looked at your attic and wondered about its untapped potential? That neglected space, often relegated to storing old keepsakes and dust, could be transformed into a vibrant, functional living area. 

Consider a Velux loft conversion – it might be the perfect solution. Velux Loft Conversions are a game-changer in the world of home renovations. But what is a Velux Loft Conversion, and how can it breathe new life into your home? 

So, if you want to expand your living space without the hassle of building an extension? This guide is for you! Here, we’ll walk you through all the essential details you need to know about Velux loft conversions: their types, building plans, advantages, and much more! So, let’s delve into the details:

What is a Velux Loft Conversion?

A Velux Loft Conversion, referred to as a roof light loft conversion, leaves the existing roofline untouched. Instead, it involves the installation of new Velux windows in the roof raft, allowing abundant natural light to flood the newly transformed space.

These windows are often called roof lights or skylights because they invite sunlight to grace the newly renovated attic area.

What distinguishes a Velux loft conversion is that it allows you to enhance and stylize your attic space without requiring substantial exterior alterations. The sole external addition consists of incorporating skylights into the roof.

Compared to other forms of loft conversions, such as dormer or hip-to-gable conversions, loft conversion with Velux windows demands less construction work and is notably less disruptive.

How Is a Velux Roof Loft Conversion Designed?

A loft conversion enables you to generate additional living space within your home without encroaching upon your garden area. However, before commencing the work, several design constraints must be taken into account, including:

  • Headroom
  • Desired loft type
  • Budget
  • Lighting and waterproofing
  • Access points
  • Structural integrity

Internal loft conversions, such as Velux loft conversion with ensuite windows, are the most cost-effective and rapid among all conversion types since they require only a few modifications to your roof space. These typically involve:

  1. Cutting an opening in the roof
  2. Installing skylights or windows on the existing slope
  3. Insulating the roof
  4. Establishing access to the loft through a staircase
  5. Reinforcing the floor

As all the work is conducted internally, small Velux loft conversion usually doesn’t necessitate planning permission.

Types of Skylights Used in Velux Loft Conversion

A variety of Velux window options are available in the market. Consulting with loft conversion specialists is advisable, as they will help you select the most suitable skylights for your Velux conversion. 

Generally, there are three primary types of skylights ideal for low-pitched roofs:

Solar Skylight: Suitable for low-pitched and flat roofs, these skylights maximize sunlight and ventilation. They feature a unique remote-operated opening mechanism.

Manual Skylight: Perfect for rooms with varying roof pitches, these skylights are similar to solar ones but operated manually, not remotely.

Fixed Skylight: Ideal for adding visual appeal to interior spaces and offering exceptional views. They are an excellent choice for low-pitched roofs.

Additional skylight types include pitched roof windows, centre pivot windows, noise reduction windows, top-hung windows, and glazed windows.

Exterior Finishing Options for Velux Windows Loft Conversion

External finishes are nearly unnecessary since the exterior roofline remains unaltered in Velux loft conversions. Cladding or slating can be applied around the new Velux windows to give them a timeless appearance.

What is Velux Loft Conversion Advantage? 

Whether you aim to create extra storage or living space, a Velux Conversion is an excellent choice when seeking an easy, non-disruptive, and cost-effective method for expanding your living area.

Key benefits include:

  • Enhanced aesthetic appeal for your home, with abundant natural light and ventilation.
  • Improved energy efficiency, reducing the demand for local energy infrastructure.
  • The creation of additional space that can be used as a bedroom, office, gym, or hobby area.

What Is Velux Loft Conversion Cost in the UK?

The cost of a basic loft conversion in the UK can vary significantly based on the project’s size and complexity. A budget loft conversion costs between £3,000 and £10,000. However, the actual cost of your loft conversion may fluctuate depending on your location and your project’s unique specifications.

Does the Velux Loft Plan Require Permission?

In most cases, a Velux Loft Conversion typically doesn’t necessitate planning permission since it preserves the existing roof structure and involves the addition of windows.

If your property already holds Permitted Development Rights (PD), designing a Velux loft conversion under a Certificate of Lawfulness is necessary. You can also initiate construction before formal approval, provided your plans adhere to council guidelines.

However, it’s important to note that there are specific scenarios where Permitted Development Rights may not apply, such as properties located in conservation areas or those that have previously undergone extensions.

What are Velux Loft Conversion Rules in the UK?

There are specific rules to consider before embarking on a Velux loft conversion:

Height: During roof modification, the loft should not extend beyond the highest point of the original roof plane. With Velux loft conversions, which typically involve pitched windows, the height mustn’t exceed the maximum roof height, whether the windows open from the bottom or top.

Protrusion: Velux loft conversion experts in the UK typically favor roof lights with slender frames that use minimal materials in their construction. This ensures that Velux windows easily conform to the standard limit of protruding no more than 150 mm above the roof plane.

Front-Facing Windows: Windows that face the front should have obscured glazing to address privacy concerns. Alternatively, you can use frosted glass to achieve privacy and ample natural light.

What Building Regulations Are Required for Velux Loft Conversion?

Regulations are crucial when converting your attic or loft space into livable quarters. These regulations are in place to ensure:

Structural Integrity: The new floor maintains high structural strength and integrity.

Roof Stability: The existing roof remains stable, with no harm inflicted during conversion.

Waterproofing and Fire Insulation: Adequate waterproofing and fire insulation measures are in place.

Safe Accessibility: Safe and properly designed staircases provide access to the newly created space.

Sound Insulation: Effective sound insulation separates the newly constructed space from the rooms below.

Is Your Home Suitable for a Velux Windows Loft Conversion?

In most cases, homes are indeed suitable for a Velux Loft Conversion. However, it’s essential to consider certain factors before proceeding with the conversion:

  1. Roof Structure: Determine your home’s type of roof structure—whether it’s purlin, rafter, or trussed. This information will impact the feasibility of the loft conversion.
  2. Height: Ensure that your loft space provides adequate headroom. For traditional homes, a minimum headspace of 2.2 meters is typically required, while modern trussed roofs may necessitate a minimum height of 2.4 meters.
  3. Available Space: Assess whether your loft space offers enough room to be transformed into a functional living area. Adequate space is essential for a successful conversion.
  4. Roof Felt: Verify that the roof is in good condition and weatherproof to prevent water damage or leaks.
  5. Chimneys and Services: Ensure that no chimneys or other essential services run through the loft space, as these can complicate the conversion process.
  6. Staircase: Determine if sufficient space is available to install a staircase that provides safe and convenient access to the newly constructed attic space.


After going through this guide, we hope you understand what is velux loft conversion and what conditions are required to design it. Velux loft conversions shine as a brilliant choice to unlock the hidden potential of your attic space.

With natural light streaming in through those stylish roof windows, you’re not just expanding your living area but creating a haven of comfort and style. Moreover, by conducting a thorough survey and considering the abovementioned factors, you can determine whether your home is well-suited for a loft conversion. 

Also, it’s advisable to consult with professionals specialized in loft conversions to assess the feasibility and potential of your specific space. So, illuminate your home and elevate your lifestyle with Velux loft conversions.

Emmanuel Nwaebo

Emmanuel Nwaebo is the Managing Director at Powerpillar Ltd and has more than 25 years experience in building construction and renovations. He has a bachelor’s in Electronics and Electrical Engineering with certification in Construction Health and Safety Technician (CHST). With an experience in managing construction and renovation services for years, he is extremely passionate about property management and loves helping people find their dream property.

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