Pricing attic conversions Cork-wide, you’ll notice quotes ranging from under €20,000 to over €50,000. The gap comes down to three things: your roof structure, the conversion type, and the finish you want. Here’s a full cost breakdown from Smart Roofing Solutions before you call a builder.
Typical costs in 2026
| Conversion type | Typical cost |
|---|---|
| Velux only | €18,000 – €28,000 |
| Rear dormer | €28,000 – €45,000 |
| Add an en-suite | + €8,000 – €15,000 |
| Storage only | From €15,000 |
Expect €1,000–€1,600 per square metre. A standard 25–30 m² bedroom conversion on a Cork semi-D usually sits mid-range.
What each quote covers
- Survey (€300–€500): Checks head height, joists and roof condition.
- Structural work (€2,000–€15,000): Truss roofs need steel beams; this is the biggest variable.
- Flooring and insulation (€1,000–€3,500): Joists, boarding and insulation to code.
- Stairs (€1,000–€3,000): Required for a habitable room.
- Windows (€800–€2,000): Velux is cheapest; dormers add headroom.
- Electrics (€500–€1,500): Wiring, lighting and smoke alarms.
- En-suite (€8,000–€15,000): Plumbing and tiling.
- Finishes (€1,500–€4,000): Plastering and painting.
What moves the price
Your roof type matters most – a cut roof from before 1980 converts easily, while a modern truss roof needs steel replacement beams. Head height must reach 2.4m over half the floor area for a habitable room; short of that, you’ll likely need a dormer. Extras like an en-suite or fitted wardrobes can add 30% or more.
Planning permission
Storage-only Velux attic conversions cork are usually exempt. Dormers facing the road, front-facing windows, and bedroom conversions typically need permission. Check Citizens Information or Cork City or County Council before beginning work.
Is it worth it?
Yes, for most Cork homes. It costs roughly half an extension per square metre, and a well-finished conversion can add 15–20% to property value. Check SEAI grants if upgrading insulation.
Get three written quotes, confirm insurance, and ask if engineer certification is included before you commit. Most conversions take 2 to 8 weeks, depending on structural work and whether an en-suite is included.
Smart Roofing Solutions has over 20 years’ experience converting attics across Cork, Limerick and Kerry, with every job fully insulated and structurally certified. Request a free quote or call 021 2067713.
