Average cost breakdown
| Item | Low | Mid | High |
|---|---|---|---|
| Velux conversion | €25,000 | €35,000 | €48,000 |
| Dormer conversion | €42,000 | €58,000 | €72,000 |
| Hip-to-gable / full mansard | €60,000 | €78,000 | €95,000+ |
Factors affecting price
- Roof type and pitch
- Planning permission needs
- Staircase position
- En-suite addition
- Insulation standard
How to get the best quote
- Confirm planning early
- Get a structural engineer quote first
- Compare detailed quotes line by line
- Choose contractors with loft conversion portfolios
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