As an indicative range, a dormer attic conversion typically costs between €30,000 and €50,000. It sits above a simple Velux conversion in price because it involves building a structure out from the roof to gain headroom and floor space.
A dormer is a box-like extension that projects from the slope of the roof, creating a section of full-height ceiling and usable floor where the original roof would have sloped down. That extra volume is exactly what makes it more expensive than a Velux conversion at €18,000 to €30,000, but it is also what makes the finished room far more practical, especially on roofs that would otherwise be too shallow for comfortable standing height.
Where you land within the €30,000 to €50,000 range depends on:
- The size of the dormer and how much of the roof it spans.
- The structural work needed, including steel and floor reinforcement.
- The standard of windows, flooring and internal finish.
- Whether you add an en-suite, which typically adds €8,000 to €15,000.
Planning is also a consideration. Dormers, particularly to the front of a house, can require planning permission, so this should be checked early as it affects both cost and timeline.
A dormer is often the sensible middle option for homeowners in Meath who need real usable space without the cost of a hip-to-gable or mansard. For an indicative figure on your house, try our cost calculator, see local pricing in our Meath cost guide, or book a free assessment.