Velux Loft Conversion London

Build Your Velux Loft Conversion

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Transform your unused loft into a bright, airy new living space with a professionally designed Velux loft conversion from LXR Construction. We specialise in Velux (rooflight) conversions across London, delivering cost-effective, low-disruption loft upgrades that dramatically increase natural light and create highly functional rooms. Whether you want a new bedroom, home office, studio, or guest space, our team manages every step — from design and planning to insulation, electrics and final interior decoration.

Why Build a Velux Loft Conversion?

  • Most Cost-Effective Loft Conversion Type – Velux conversions require minimal structural alteration, making them the most affordable way to convert your loft into a usable room.
  • Minimal Exterior Changes – Because the roof structure remains largely unchanged, Velux conversions often do not require planning permission — ideal for areas with stricter planning rules.
  • Faster, Less Disruptive Build – These conversions involve fewer external works and no major roof extensions, resulting in shorter build times and less disruption to your home.
  • Perfect for London Homes of All Types – Whether you live in a terraced, semi-detached or detached property, Velux loft conversions are versatile, flexible, and suitable for most roof types.
velux on the roof of a house

Take the first step toward the Velux loft extension you’ve always dreamed of….

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Our Step By Step Process To Building Your Velux Loft Conversion

1

Consultation & Design

We begin by assessing your loft’s dimensions, structural potential and how you plan to use the new space. We will help you explore window sizes, layouts, staircase positions, insulation requirements and lighting plans. We then create a tailored design that maximises headroom, comfort and natural light.

2

Planning & Approvals

Many Velux loft conversions fall under permitted development due to minimal external alterations. If planning permission or building regulations approval is required, we handle everything — drawings, submissions, structural calculations and party wall notices.

3

Construction & Project Management

Our experienced Velux conversion team carries out the build with efficiency and care. A dedicated project manager oversees all works including structural strengthening, window installation, insulation, electrics, plumbing (if required), plastering and interior works. You receive regular progress updates from start to finish.

4

Completion & Interior Fit-Out

Once structural and electrical works are complete, we finish your new loft with flooring, lighting, heating, carpentry and full decoration. We then conduct a detailed quality inspection and walk you through the completed space to ensure every detail meets our high standards.

How Much Does A Velux Loft Conversion In London Cost?

Velux loft conversions are the most budget-friendly option due to their minimal structural changes. Typical costs include:

  • £25,000 – £40,000+ for a basic Velux loft conversion
  • £40,000 – £65,000+ with upgraded finishes, joinery or layout improvements
  • £65,000 – £90,000+ with ensuite bathrooms or complex structural adjustments

A detailed, itemised quote is provided following your consultation and survey.

Will a Velux Loft Conversion Add Value to Your Home?

Yes. Velux conversions often increase property value by 10–20%, depending on size and function. They offer a highly cost-efficient way to add liveable space — especially valuable in London where square footage comes at a premium.

Frequently Asked Questions

A Velux loft conversion (also called a rooflight conversion) involves adding Velux windows into the existing roof slope without building a dormer or changing the roofline.

Often no — many fall under permitted development. We confirm this during design and handle any necessary applications.

Yes. They are typically the cheapest type of loft conversion due to minimal exterior structural work.

Most builds take 8–12 weeks, depending on layout, structural requirements and finishes required.

A Velux loft conversion is ideal if your loft has sufficient existing headroom (usually around 2.2m). We assess suitability during your initial consultation but generally can do them in almost all lofts with suitable head height.

Yes. Many homeowners choose to include an ensuite bathroom, depending on available space and plumbing access.

In most cases, yes. Velux conversions are the least disruptive loft conversion type.

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    Our Velux Loft Conversion Services

    From stylish modern designs to character-preserving builds for period homes, we offer a complete suite of services:

    Standard Velux Loft Conversions

    Cost-effective conversions that transform your loft using rooflight windows and minimal alterations.

    Velux Conversions with Ensuite Bathrooms

    Add extra comfort and privacy with a fully fitted bathroom in your new loft space.

    Large Rooflight Configurations

    Create dramatic natural light with multiple Velux windows or triple rooflight layouts.

    Velux + Mini Dormer Hybrid Conversions

    Combine rooflights with small dormers for enhanced space and functionality.