If you’re like many UK homeowners, you might be staring up at your underused loft space, wondering how best to unlock its potential. With rising property prices and the need for extra space, loft conversions have become a popular solution—but which type should you go for?
In this blog, we’ll explore the benefits of a dormer vs. a Velux loft conversion, helping you decide which one is right for your home, needs, and budget.
Looking for help with a loft conversion in Kent or the surrounding areas? Contact our experts at Bigger Living Lofts today by calling 01732 523199 or emailing info@biggerlivinglofts.com.
Choosing between a dormer and Velux loft conversion isn’t just about cost—it’s about lifestyle, light, space, and how you want to use your home. We help you get it right the first time.
Understanding Dormer And Velux Loft Conversion Options
Before comparing benefits, it’s important to understand what each type of conversion entails and what makes them so popular.
What Is A Dormer Loft Conversion?
A dormer loft conversion extends vertically from your existing roof slope, creating additional headroom and floor space. Typically box-shaped, it projects out from the roof and can include large dormer windows or even Juliet balconies.
Learn more about our dormer loft conversions
What Is A Velux Loft Conversion?
A Velux loft conversion involves fitting Velux roof windows into your existing sloped roof without changing the structure. It’s often referred to as a rooflight conversion and is ideal if you already have sufficient internal roof height and want a quicker, lower-cost transformation.
Browse Velux loft conversion ideas.
Dormer Loft Conversion Benefits
1. More Headroom And Usable Floor Space
One of the primary benefits of a dormer loft conversion is the significant increase in headroom and floor space. By extending the roof outward, you can stand and move freely throughout most of the room, ideal for bedrooms, offices, or bathrooms.
2. Suitable For Steep Roofs
If your existing roof has a steep pitch, a dormer helps make that space functional. The extension opens up the cramped attic, offering a more versatile layout.
3. Better For Large Or Complex Layouts
Do you need multiple rooms, an en-suite, or built-in storage? Dormers provide a more adaptable canvas for complex designs compared to Velux options.
4. Potential For Juliet Balconies And French Doors
With the additional vertical wall space, dormers can accommodate features such as Juliet balconies, thereby enhancing views, ventilation, and style.
5. Adds More Property Value
In general, dormer lofts add greater resale value, as they offer more living space and improve your home’s architectural appeal.
Velux Loft Conversion Advantages
1. Minimal Structural Changes
A major advantage of a Velux loft conversion is the simplicity of its construction. With no need to alter the roof’s structure, it causes less disruption and is completed more quickly.
2. Lower Cost And Faster Turnaround
Cost comparison between dormer and Velux loft conversions clearly shows Velux options as more budget-friendly. Most Velux conversions cost around £30,000–£35,000, whereas dormers can range from £40,000 to £50,000.
3. Superior Natural Light
Roof windows bring in more natural light than traditional dormers, especially when installed in multiples or using larger window formats, which is ideal for creating a bright, airy feel.
4. Planning Permission Rarely Needed
Most Velux conversions fall under permitted development, so that you can avoid lengthy planning processes. That’s not always the case with dormers, especially in conservation areas.
5. Retains Original Exterior Appearance
Love your home’s kerb appeal? A Velux conversion won’t change the external roofline, making it ideal for period properties or when you want to preserve your current façade.
Comparing Dormer And Velux Loft Conversions
When comparing dormer and Velux loft conversions, consider how each type meets your lifestyle, home type, and goals.
| Feature | Dormer Conversion | Velux Conversion |
| Headroom | High (great for standing space) | Moderate (depends on roof slope) |
| Natural Light | Good | Excellent |
| Construction Time | Moderate (6–10 weeks) | Short (4–6 weeks) |
| Planning Permission | Sometimes needed | Rarely needed |
| Cost | Higher | Lower |
| Design Flexibility | Excellent | Limited to existing space |
| Kerb Appeal Impact | Visible from the exterior | Minimal impact |
Choosing The Right Loft Conversion Type
Still unsure which loft conversion is better: dormer or Velux loft conversion? That depends on your space, budget, and objectives. Here’s how to decide:
- Go Dormer if you need more space, have a steep roof, or want a full master suite or workspace.
- Choose Velux if you’re on a tighter budget, have a good existing roof height, and want to keep the project simple and quick.
Read our full guide on choosing the right loft type
Energy Efficiency And Insulation Considerations
Wondering about energy efficiency in dormer vs Velux loft conversion?
- Velux windows often come with built-in thermal insulation and triple glazing options, which help keep heat in and reduce bills.
- Dormers require careful insulation of the extended structure, but with the right materials, they can be just as efficient.
Regardless of your choice, we ensure all our conversions meet building regulations and include premium insulation for year-round comfort.
Get in Touch
Conclusion
Choosing between a dormer vs Velux loft conversion doesn’t have to be complicated. It’s all about matching the design to your home’s structure, your family’s needs, and your long-term plans.
If you want more space, height, and increased resale value, consider a dormer. If you’re looking for a cost-effective, quick, and light-filled transformation, Velux is a fantastic option.
At Bigger Living Lofts, we’ve delivered both types across Kent, always ensuring your new space is beautifully designed, well-built, and energy-efficient.
Call us on 01732 523199 or email info@biggerlivinglofts.com to book your free consultation. Let’s make your dream loft a reality.
Explore our loft conversion guide to learn more.
FAQs
1. What is the difference between a dormer and a Velux loft conversion?
A dormer involves extending your roof outward to create more headroom and floor space. A Velux conversion preserves your existing roofline and incorporates roof windows for enhanced light and ventilation.
2. Which is cheaper: a dormer or a Velux loft conversion?
Velux conversions are typically cheaper, costing £30,000–£35,000, while dormers range from £40,000 to £50,000 due to the additional building work and materials required.
3. Do dormer loft conversions require more planning?
Yes, dormer conversions may require planning permission, depending on their size and your location. Velux conversions usually fall under permitted development rights.
4. Which loft conversion allows more natural light?
Velux conversions typically provide more natural light due to the large roof windows installed on the sloped surface, often covering a wider area of the ceiling.
5. Is a Velux conversion suitable for all types of roofs?
No, Velux conversions work best when you already have enough roof height and space. For low or steeply pitched roofs, a dormer may be a more practical option.