# Attic Conversion Cost Dublin | 2026 Prices, Dormers & Fees > Attic conversion cost in Dublin in 2026: €28,000–€75,000 for a habitable room, engineering €800–€2,500, steel and dormers explained, with sources. URL: https://structuralengineer.ie/guide/attic-conversion-cost-dublin/ Cost Guide # Attic Conversion Cost in Dublin (2026) What a habitable attic room costs in Dublin, where the money goes, and why dormers and trussed roofs move the price. By StructuralEngineer.ie · Reviewed by Joachim Louw, CEng MIEI · Updated 19 October 2026 [StructuralEngineer.ie](https://structuralengineer.ie/)'s summary of published 2026 figures: a habitable attic conversion in Dublin typically costs **€28,000–€55,000** without a large dormer and **€50,000–€75,000** for a semi-detached house with a dormer. Structural engineering is usually **€800–€2,500** of that, and storage-only conversions start at around €18,000. Attic conversion cost in Dublin is driven by three things: the roof type, the dormer, and what the room has to comply with to be called a bedroom. The ranges below come from Dublin-focused 2026 cost guides, listed under Sources. ## Typical costs at a glance | Item | Typical range | Notes | | --- | --- | --- | | Storage-only conversion | ~€18,000 | Not a habitable room | | Habitable room, no large dormer | €28,000–€55,000 | Velux-style rooflights | | Semi-detached with dormer | €50,000–€75,000 | Most common Dublin spec | | Truss removal and steel | €6,000–€14,000 | Within the totals above | | Structural engineering | €800–€2,500 | Calcs, drawings, inspection, sign-off | ## Where the money goes **Structure.** A new floor of C24 joists, because existing ceiling joists were sized for storage, plus steel or timber beams to replace any truss members that are cut, and trimming for the stair opening and the dormer. **Dormer.** Framing, roofing, cladding and windows. Rear and side dormers became exempted development within limits from July 2026. Front dormers still need permission. **Fire and stairs.** A protected route to the stair, fire-rated doors and a stair that meets Technical Guidance Document K. **Finishes and services.** Insulation to Part L, plasterboard, electrics, heating and flooring. ## What pushes the price up - **Trussed roofs**, standard from the 1970s on, need more replacement structure than older cut roofs - **Low headroom** means a bigger dormer or lowering the ceiling below - **Hip roofs** need a hip-to-gable conversion, with a new gable wall that needs checking at its foundation - **Water tanks and chimneys** in the way have to be relocated or supported - **Access** for steel through a finished house ## How to keep it under control Get the structural design done before builders price the job. Every builder then prices the same floor, steel and dormer, and you avoid “we’ll see when we open it up” extras. The engineer also confirms early whether the headroom works, before you pay for drawings of a room that can’t be built. ## Bottom line Budget €28,000–€75,000 for a habitable attic room in Dublin in 2026, depending mostly on the dormer and the roof type, with €800–€2,500 of it going to engineering. To get a fixed engineering fee and an early answer on headroom, call [01 270 9764](tel:+35312709764). Want a fixed fee for your job? Call 01 270 9764. Callback the same working day. Fixed fee confirmed in writing before the visit. [Call 01 270 9764](tel:+35312709764) [Request a fixed quote](https://structuralengineer.ie/contact/) ## Frequently asked questions **Is a storage-only attic conversion cheaper?** Yes. Published Dublin figures put storage-only conversions at around €18,000. That doesn't include the new floor structure, fire protection and stairs a habitable room needs. It can't be sold as a bedroom, and buyers' surveyors check. **Does a dormer add much to the cost?** A dormer adds roof structure, steel or timber trimming, cladding and waterproofing, so it moves a project toward the upper end of the range. It is often what makes the headroom work, which is why many Dublin conversions include one. **How much of the attic budget is engineering?** Typically €800–€2,500 for calculations, drawings, inspection and sign-off, a small share of a €28,000–€75,000 project. It decides how much structure, especially steel, the builder installs. Sources - [calculateroofcost.ie: Attic conversion cost Dublin 2026](https://www.calculateroofcost.ie/attic-conversion-cost-dublin/) - [Premier Builders: Attic conversion prices in Dublin, 2026](https://premierbuilders.ie/attic-conversions-prices/) - [Constructors.ie: Attic conversion cost and regulations](https://constructors.ie/blog/attic-conversion-cost-ireland-regulations-guide) Get a fixed engineering fee Two short steps. We call back the same working day. Prefer to talk? [Call 01 270 9764](tel:+35312709764). A live person answers during office hours. [Related service Attic Conversions Floor joist upgrades, truss alterations and dormer steel for habitable attics. See the service](https://structuralengineer.ie/attic-conversion-structural-engineer/) Talk it through 01 270 9764 Mon–Fri 8:00–18:00 [Call now](tel:+35312709764) ### More guides - [Attic Conversion Regulations in Ireland (2026) What it takes for an attic to be a legal habitable room: structure, headroom, fire, stairs and the July 2026 dormer exemption.](https://structuralengineer.ie/guide/attic-conversion-regulations-ireland/) - [How Much Does a Structural Engineer Cost in Dublin? (2026) Typical 2026 fees by job type, the three ways engineers charge, and what a complete quote should include, with sources for every figure.](https://structuralengineer.ie/guide/structural-engineer-cost-dublin/) - [Cost to Remove a Load-Bearing Wall in Dublin (2026) Engineer's fee, steel, propping and making good, with the factors that move the price and sources for every figure.](https://structuralengineer.ie/guide/load-bearing-wall-removal-cost/) - [Garage Conversion Cost in Dublin (2026) What it costs to turn an integral or attached garage into a room in Dublin, and where the structural money goes.](https://structuralengineer.ie/guide/garage-conversion-cost-dublin/)