When planning an attic conversion in Ireland, the first big decision is whether to go with a Velux (rooflight) conversion or a dormer. Both are popular choices ā but they suit different homes and different budgets. Here's a straight comparison.
Side by Side Comparison
| Feature | Velux Conversion | Dormer Conversion |
|---|---|---|
| Cost | ā¬15,000 ā ā¬22,000 | ā¬25,000 ā ā¬40,000 |
| Headroom | Limited to existing roof pitch | Full height throughout |
| Floor space | Unchanged | Significantly increased |
| Natural light | Excellent (roof windows) | Very good (vertical windows) |
| En-suite possible? | Sometimes (space dependent) | Yes ā easily |
| Planning permission | Usually exempt | Usually exempt (rear only) |
| Build time | 3ā5 weeks | 6ā10 weeks |
| Value added | ā¬20,000 ā ā¬35,000 | ā¬50,000 ā ā¬75,000 |
When to Choose Velux
A Velux conversion is the right choice when:
- Your attic already has good headroom (2.2m+ at the ridge)
- Budget is the primary consideration
- You want a home office or occasional guest room rather than a primary bedroom
- You want minimal disruption and a fast turnaround
- The existing footprint is sufficient for your needs
š Velux wins on: Cost, speed, simplicity and natural light. Ideal for high-pitched roofs where existing headroom is already good.
When to Choose Dormer
A dormer conversion is the right choice when:
- You want a full double bedroom with comfortable headroom throughout
- An en-suite bathroom is required
- Your roof pitch is relatively shallow (limiting headroom)
- You want maximum return on investment
- The room will be used as a primary bedroom
š Dormer wins on: Space, usability, en-suite potential and property value added. Best for creating a proper bedroom.
Can I Have Both?
Yes ā and many Dublin homeowners do. A rear dormer combined with a front Velux gives you the best of both: maximum space and headroom from the dormer, plus excellent natural light from the Velux. This combination is very popular on standard Dublin semi-detached houses.
š” If your roof is a relatively shallow pitch (common in 1960sā1980s Dublin housing), a dormer is almost always the better choice as the Velux option won't give enough standing headroom.
How to Decide
The easiest way to decide is a free survey. We measure your ridge height, assess your roof pitch, discuss how you want to use the space and recommend the best option for your specific property. There's no obligation and it takes about 30 minutes.
Not Sure Which is Right for You?
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