Windows in Loft Conversions: Choosing the Right Option for Light, Ventilation & Style
- Catherine Allen
- May 17
- 3 min read
When planning a loft conversion one of the most important design decisions you’ll make is how to bring in natural light. The right windows can completely transform your loft space making it feel bigger, brighter and more connected to the rest of your home.
At The Loft Build Company we guide every client through their loft conversion windows options to ensure the final result looks beautiful, functions perfectly and meets all regulations. From traditional dormers to sleek skylights in loft conversions, this article explores your window choices along with the pros, cons and what to consider.
Why Are Loft Conversion Windows So Important?
Windows serve more than one purpose in a loft conversion. Beyond bringing in natural light, they:
Provide essential ventilation
Create a sense of space and openness
Can act as emergency escape routes (a building regulation requirement in some cases)
Frame views and add architectural style
Different types of loft conversion windows offer different benefits and the best option will depend on your roof structure, budget and the overall design of the conversion.
1. Skylights in Loft Conversions (Velux Windows)
Skylights commonly referred to as Velux windows (named after the brand) are fitted directly into the slope of your roof. They’re ideal for lofts that don’t alter the roofline such as Velux conversions and can be placed in bedrooms, bathrooms and stairwells for extra light.
Pros:
✔ Let in a large amount of natural light
✔ Cost-effective and quick to install
✔ Don’t usually require planning permission
✔ Great for ventilation and passive heating in cooler months
Cons:
✘ Limited view (as they’re on an angled roof)
✘ Can cause overheating in summer without blinds or ventilation
✘ May require motorised opening options if positioned high up
At The Loft Build Company we recommend combining skylights with blackout blinds and vented glazing for optimal comfort.
2. Dormer Windows
Dormer windows are built into an extension of the roof, creating a vertical window that juts out from the sloped roofline. They are often used in dormer loft conversions which add headroom and usable floor space.
Pros:
✔ Add floor area and headroom
✔ Allow for larger, traditional windows with wider views
✔ Versatile styling options (pitched, flat-roofed, or L-shaped)
Cons:
✘ Typically more expensive due to structural changes
✘ May require planning permission
✘ More visible from the outside - needs to match existing architecture
Dormers are perfect if you’re aiming for a more permanent, room-like feel and want windows that mirror the rest of the home.
3. Gable-End Windows
If your property has a gable wall then adding a large window can be a striking design feature often seen in gable or hip-to-gable conversions.
Pros:
✔ Beautiful aesthetic, especially for large, triangular windows
✔ Floods the space with light
✔ Adds a modern architectural statement
Cons:
✘ May not suit all property styles
✘ May require structural changes and planning permission
4. Juliet Balconies and French Doors
Want to bring the outdoors in? Juliet balconies, often combined with floor-to-ceiling French doors, offer stunning views and lots of daylight, while maintaining safety.
Pros:
✔ Dramatic visual impact
✔ Excellent ventilation
✔ Adds a luxury feel to bedrooms
Cons:
✘ Typically more costly
✘ Requires structural support and compliance with safety regulations
What to Consider When Choosing Loft Conversion Windows
When designing loft conversion windows we always recommend clients consider the following:
Orientation: South-facing windows get the most sunlight (and heat); north-facing offer more diffused light.
Ventilation: Skylights are excellent for passive airflow; dormers allow for larger openings.
Privacy: Skylights offer privacy in overlooked areas, ideal for urban homes.
Planning Permission: Many window types are allowed under permitted development, but dormers or large openings may need formal approval.
Building Regulations: Some windows may be required to serve as emergency exits. We ensure all installations are fully compliant.
The Loft Build Company Difference
At The Loft Build Company Emmet and the team don’t just install windows, we design them with purpose. From your very first consultation we’ll help you choose the right type, size and position for maximum light, functionality and aesthetic appeal.
We also work with premium glazing suppliers and offer optional upgrades like smart blinds, thermal glass and anti-glare coatings to ensure comfort all year round.
Ready to Brighten Up Your Loft?
Check out our full Loft Conversion Types or explore recent projects
Got a question about Velux windows, dormers or planning permission? Contact us for expert advice and a no-obligation quote today.
0208 129 0976
