Types of Loft Conversion
Velux Loft Conversions
Brighten your home, add value, and create a beautiful new space with a Velux loft conversion from Marken Lofts – trusted specialists with over 30 years’ experience across London and surrounding areas.
Let the Light In: Transform Your Loft with Velux Windows
Velux windows are renowned for their ability to flood any space with natural light, making them a game-changer in loft conversions. By installing these sleek roof windows, even the darkest attic can be transformed into a bright, airy room that feels open and welcoming.
The influx of sunlight not only enhances the visual appeal of the space but also creates a warm, uplifting atmosphere, perfect for living areas, bedrooms, or home offices. With Velux windows, your loft becomes a vibrant extension of your home, where daylight becomes a central design feature, illuminating every corner and making the space feel larger and more inviting.

All our conversion projects are fully compliant with local building authority regulations. From the initial design phase to construction and final completion, our skilled team offers complete support, including drawings, structural plans, and a detailed schedule of works to ensure top-quality service. We provide a 10-year guarantee on all structural and roofing work and are fully insured up to £10 million. If planning permission is needed, we also guide you through the process to make everything as seamless as possible.
Marken Lofts are here to help with any issues that you may have. Try our new WhatsApp option using 07828 225 872. You can also fill out our enquiry form to get an instant quote.

What is a Velux Loft Conversion?
A Velux loft conversion, also known as a rooflight loft conversion, is one of the most straightforward and cost-effective ways to transform your attic into a functional living space.
Unlike other types of loft conversions, a Velux conversion does not require extensive structural changes to the existing roof. Instead, it involves installing Velux windows (or similar roof windows) into the roof slope to allow natural light to flood the space. This method is perfect for properties where preserving the existing roofline is important, or for homeowners looking for a less intrusive way to gain extra room.
Since no major alterations are made to the roof structure, Velux conversions are typically quicker and more affordable than other types of loft conversions, making them an attractive option for many homeowners.
Benefits of a Velux Loft Conversion
There are several key advantages to choosing a Velux loft conversion, which makes it one of the most popular types of loft extensions:
- Cost-Effective: A Velux loft conversion is one of the most affordable options, as it doesn’t involve altering the roof’s structure or building out extensions, keeping costs relatively low.
- Quick Installation: With no need for significant structural changes, a Velux conversion can be completed much faster than dormer or hip-to-gable conversions, minimizing disruption to your home life.
- Maximizes Natural Light: Velux windows are designed to bring in a maximum amount of daylight, creating a bright and airy loft space that feels open and inviting.
- Maintains Roofline Aesthetics: Unlike dormer or gable conversions, a Velux loft conversion preserves the original shape and structure of the roof, making it ideal for homes where external alterations aren’t allowed or desired.
- Planning Permission Flexibility: Since there are no major changes to the roof’s structure, most Velux loft conversions fall under permitted development rights, meaning you likely won’t need planning permission. If you live in a conservation area, Velux has specially designed conservation windows too.
- Increased Property Value: Converting your loft into a functional living area, such as an extra bedroom or home office, can add significant value to your property while improving your home’s overall appeal.

Ideas for Your Velux Loft Conversion
A Velux loft conversion offers a range of creative possibilities, allowing you to turn your unused attic space into a valuable, functional area. Here are some ideas to inspire your project:
- Home Office: In today’s world, having a quiet, dedicated space to work from home is more important than ever. With plenty of natural light streaming in through Velux windows, a loft office can be the perfect retreat for productivity.
- Guest Bedroom: Turn your attic into a cozy guest bedroom, complete with comfortable furnishings and skylight views. The natural light will make the room feel welcoming and airy for visitors.
- Children’s Playroom: Create a fun and safe playroom for your children. The Velux windows will keep the space bright during the day, and you can use the sloped ceilings creatively for storage or play areas.
- Hobby Room or Art Studio: Whether you’re an artist, writer, or simply need a quiet space for a hobby, a Velux loft conversion offers a bright and inspiring environment for creativity.
- Bathroom: If your loft conversion has enough height, consider adding a sleek, spa-like bathroom. Velux windows can provide both light and ventilation, making it an ideal option for a luxurious retreat.
- Reading Nook: For book lovers, a cozy reading nook with soft seating under Velux windows can offer a peaceful and light-filled space to relax and unwind.

Do I Need Planning Permission?
One of the great advantages of a Velux loft conversion is that it typically falls under permitted development rights, meaning you may not need formal planning permission. However, there are conditions to keep in mind:
- The windows should not extend beyond the plane of the existing roof slope on the front elevation.
- The conversion must not extend the roof beyond its existing dimensions or alter its shape.
- The height of the roof must not be increased.
- If you live in a conservation area or your home is a listed building, you may need planning permission, even for a Velux conversion, but even then, Velux has specifically designed conservation style windows.
It’s always wise to check with your local planning authority to make sure your project complies with all necessary regulations before getting started. (Need help? We’re happy to advise on planning.)
Confused About Planning Permission?
Not sure if your loft conversion needs full planning approval? Read our guide to Permitted Development Rights to find out what you can build without the red tape – especially useful for London homeowners.

What do I need to know about Building Regulations?
While planning permission may not be required, a Velux loft conversion still needs to meet building regulations to ensure the new space is safe, energy-efficient, and structurally sound. Key areas of compliance include:
- Structural Integrity: The new suspended floor joists and RSJs must be strong enough to support the additional weight of the loft conversion.
- Fire Safety: Adequate fire safety measures, such as fire-resistant doors, smoke alarms, and escape routes, are essential to meet building regulations.
- Insulation: The loft space must be properly insulated to meet thermal efficiency standards, ensuring the room remains warm in winter and cool in summer.
- Staircase Requirements: A permanent staircase must be installed to provide safe access to the loft. This staircase must meet specific building code standards, including width and headroom.
- Ventilation: Proper ventilation is essential to prevent condensation, particularly in bathrooms or areas with high humidity.
We will ensure that all necessary inspections are carried out at different stages of the project to ensure compliance with building regulations.
How much does a Velux Loft Conversion cost?
The cost of a Velux loft conversion is one of its major advantages. Due to the minimal structural changes required, the average price is typically lower than other types of loft conversions. A basic Velux conversion usually costs between £25,000 and £40,000, depending on the size of the space and the complexity of the project.
The final price may vary depending on factors such as the number of windows installed, number or rooms and the overall finish level you desire (for example, adding an en-suite bathroom would increase costs).
While a Velux loft conversion is generally more affordable, it’s important to remember that even this simpler type of loft conversion can add significant value to your home, offering a solid return on investment over time.
Want the Full Cost Breakdown?
For a more detailed look at pricing, visit our updated guide: Loft Conversion Costs in London – What You Need to Know. It covers everything from build types to hidden expenses – so you can plan with confidence.
Conclusion
A Velux Loft Conversion is a practical, affordable, and efficient way to unlock the potential of your attic space. Whether you’re looking to add an extra bedroom, a quiet home office, or a bright hobby room, a Velux conversion allows you to enjoy a light-filled, functional space without making major alterations to your home’s structure.
With its lower costs, faster installation time, and minimal need for planning permission, a Velux loft conversion is an excellent choice for homeowners looking to expand their living space and increase their property value in a hassle-free way.
Why choose us to design and install your loft conversion?
With more than 28 years of practical experience, Marken Lofts specialise in delivering outstanding loft conversions. We take pride in our work and always strive to ensure our customers are truly happy and feel they have received exceptional value for their investment.
Our Commitment to Excellence
- Uncompromising Quality: Every project we undertake reflects our dedication to superior craftsmanship.
- Competitive Pricing: Offering exceptional value without compromising on excellence.
- Fully Insured: For your peace of mind, our team is fully insured up to £2 million.
- Immaculate Cleanliness: We maintain the highest standards of tidiness on every job.
- Transparent Pricing: Clear, upfront costs with no hidden surprises—know exactly what to expect.
- 10-Year Work Guarantee: Confidence and peace of mind with every project.
- End-to-End Project Management: From concept to completion, we handle every detail for a seamless loft conversion experience.
Our 10-Year Guarantee reflects the confidence we have in our skilled team to deliver outstanding results every time.
Areas we work in
We deliver exceptional loft conversions across North London, East London, and Central London. Get in touch if you would like to confirm we cover your area, or click on the map for more information.
For advice on a loft conversion or for a free survey call 0800 111 4883 or enquire online:
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Types of Loft Conversions
Highly distinctive loft conversion services to enhance your space, whatever your needs.
What is a Velux loft conversion?
A Velux loft conversion is a type of loft conversion that uses Velux roof windows installed into the existing roof slope without changing its shape. This creates a bright, airy space while keeping costs and disruption lower than other conversion types.
How much does a Velux loft conversion cost in London?
In London, Velux loft conversions typically start from £25,000 + VAT, with prices increasing depending on the size of the space, number of windows, and any added features like bathrooms or bespoke storage.
Do I need planning permission for a Velux loft conversion?
In most cases, Velux loft conversions fall under permitted development rights and do not require planning permission, provided the work meets certain criteria. However, homes in conservation areas or flats may need formal approval. Marken Lofts can confirm this for you before starting work.
How long does a Velux loft conversion take to complete?
A standard Velux loft conversion usually takes 6-8 weeks from start to finish, depending on the complexity of the project.
What are the benefits of a Velux loft conversion compared to other types?
Velux loft conversions are usually quicker to complete, more cost-effective, require less structural change, and let in abundant natural light and fresh air.
Can I add a bathroom in a Velux loft conversion?
Yes, bathrooms can be included in Velux loft conversions. This will require plumbing adjustments and adequate ventilation, which Marken Lofts can design into your project.
Will a Velux loft conversion add value to my home?
Yes – a well-planned loft conversion can add up to 20% to your property’s value, especially in high-demand London areas.
Do Velux windows help improve natural light and ventilation?
Absolutely. Velux windows are designed to maximise daylight and allow excellent ventilation, making your loft space comfortable year-round.
Are Velux loft conversions suitable for all types of roofs?
Velux loft conversions work best with roofs that have enough internal height (generally at least 2.2 metres from floor to ridge). Marken Lofts can assess your home to check suitability.
What size Velux windows can be installed in my loft?
Velux windows come in a range of sizes, from compact skylights to large roof lights. The right size depends on your roof pitch, the room’s use, and how much natural light you want.
Do Velux windows meet building regulations?
Yes – when installed by professionals, Velux windows comply with UK building regulations, including safety, insulation, and escape route requirements.
What is the difference between a Velux loft conversion and a dormer conversion?
A Velux loft conversion keeps your existing roof shape and simply adds roof windows. A dormer conversion extends the roof vertically to add extra headroom and floor space.
Can Velux windows be installed without scaffolding?
For safety and efficiency, scaffolding is usually recommended, especially during a loft conversion, to ensure secure installation and compliance with regulations.
How energy efficient are Velux windows?
Modern Velux windows use double or triple glazing with thermal insulation, helping to reduce heat loss and improve your home’s energy efficiency.