How Much Does It Cost to Renovate a House in Ireland in 2026? Full Breakdown by Room, Region and Spec

The headline number

The honest answer to “how much does it cost to renovate a house in Ireland in 2026?” is a band, not a figure. The SCSI Nov 2025 mean for residential renovation runs €2,250 – €3,150 per m² ex-VAT, with regional spread of roughly ±35% on either side. For the typical Irish 4-bedroom semi at 125–155 m², that lands the headline at roughly €295,000 – €465,000 ex-VAT for a structural renovation with kitchen, bathroom and BER upgrade — before professional fees, VAT or any extension.

That number is unhelpful on its own. The four axes that actually drive the cost are scope (refresh vs gut), spec (budget vs mid vs premium), region (a Foxrock semi is not a Mayo semi) and the property’s period (Georgian Dublin terraces hide costs that 2005 semis do not). This guide breaks each of those out with current 2026 numbers and explains which one moves your budget the most.

Everything below is in 2026 money, ex-VAT, calibrated on the SCSI Nov 2025 dataset, the CSO Construction Output Price Index Q1 2026, and Engineers Ireland day-rate guidance. We update these quarterly. The same calibration powers our renovation cost calculator — if you want a single tailored number rather than a range, run it through there once you have read the rest of this guide.

Cost by scope — the single biggest driver

Scope is the variable that swings your budget the most. A “moderate refresh” on a tidy 2005-built south-Dublin semi can be done for €85k. The same property, gutted to block and rebuilt to B2-rated mid-range spec, lands around €395k. Same house. Same square metres. Four-and-a-half-fold cost range.

The four scope tiers we use match SCSI conventions and the way mainstream Irish contractors actually price work. Pick the one that matches your brief honestly — most homeowners under-estimate scope at the start of a project, and the contingency is what closes the gap.

Two notes on the table. First, the bands overlap at the edges — a high-end structural renovation in South County Dublin can cost more than a low-end full gut in Connacht. Second, the per-m² figure assumes you are renovating the whole property; renovating only the kitchen and one bathroom costs more per m² than doing the whole house, because the fixed-cost overheads (skip hire, scaffold, contractor mobilisation, site setup) are absorbed by a smaller renovated area.

Cost by spec tier — what your finishes actually move

Most homeowners are surprised by how little the spec tier moves the headline. Once the structural work is done, the spec choice (Howdens or Cawley Furniture or Newcastle Design) accounts for a smaller proportion of the budget than people assume — typically 15–25% of total project cost. The structure, services and BER upgrade are the dominant lines.

The headline finding from running our manual calculator on the first 4,500 Irish user submissions: moving up one spec tier on a full-gut project adds roughly 24% to the total budget. Moving up two tiers adds roughly 58%. The dominant move is structural and services; finishes are the long-tail.

Cost by region — the postcode premium

The regional spread for an Irish renovation is wider than most homeowners expect. South County Dublin labour day-rates in 2026 run roughly 25–35% above the SCSI national mean; rural Connacht and Ulster run 15–25% below. The materials cost is broadly uniform; the labour, scaffold, parking, congestion penalty in Dublin City and waste disposal lines are where the regional gap actually opens up.

Cost by room — the per-room reference table

The most-asked SEO question we see in our search-console data is variations of “how much does a kitchen renovation cost Ireland”, “how much for an attic conversion Dublin”, and “how much is a rear extension Cork”. Here are the 2026 mid-range bands ex-VAT, calibrated on the SCSI Nov 2025 dataset and Engineers Ireland guidance.

The eight hidden costs nobody quotes for

Every cost article you have read so far quotes the trade work. The hidden costs — the ones that turn a €315k budget into a €390k actual outturn — are the costs your builder will not include in the headline quote because they are client-side spends. Eight of these recur on almost every Irish renovation we see.

1. Professional fees. Architect or architectural technologist 6–10% of build cost for full service (RIAI Conditions of Engagement). Structural engineer €1,500–€3,500 per calculation package. BCAR Assigned Certifier and Design Certifier €2,500–€6,500 combined. Building Control / Commencement Notice fees €30 + €2.40 per m². Pre-purchase Engineers-Ireland-certified building survey €450–€950 if you haven’t had one. Total professional fee package on a typical Irish structural reno: €18,000–€32,000 on top of the build figure.
2. VAT. Reduced rate 13.5% on most labour and materials supplied as part of a residential renovation in Ireland. Critically, materials bought separately by the homeowner (DIY) attract the standard 23% rate; let the contractor purchase the materials on your behalf and the whole package becomes 13.5%. The Home Renovation Incentive (HRI) ended Dec 2018 and has not been reinstated. Confirm 13.5% in writing with your contractor before invoicing.
3. Planning & BCAR. Householder planning application €65. Section 5 declaration €80. Retention application €34. Combined BCAR Assigned Certifier + Design Certifier package €2,500–€6,500 (see above). Add €1,500–€3,500 for a planning consultant if you are in an Architectural Conservation Area or working on a Protected Structure on the Record of Protected Structures.
4. SEAI grant timing and bridging cost. The Better Energy Homes grant, Solar Electricity Grant, EV Charger Grant and One Stop Shop payments are typically reimbursed 8–16 weeks after works completion, not at the start. You fund the work upfront and reclaim. Realistic bridging cost on an SEAI-grant-eligible whole-home upgrade: €8,000–€18,000 of working capital for 3–4 months.
5. Temporary accommodation. If the renovation makes the property uninhabitable for any length of time (full gut typically 5–8 months), you need somewhere to live. Rental on the equivalent property in the same area in Dublin runs €2,400–€4,500/month for a family-sized house. Six months at €3,200 is €19,200 minimum. Outside Dublin, €1,800–€2,800/month typical.
6. Skip hire and waste disposal. Builders include some skip hire in their quote; most do not include sufficient for a full strip. Realistic skip budget for a 4-bed full strip-out in Dublin: 3–6 large skips at €425–€650 each. Total €1,800–€4,500.
7. Insurance. Building works exceeding €100,000 typically void a standard home insurance policy in Ireland. You need either a notified renovation policy (premium roughly €1,200–€2,800 for a 6–9 month build) or a Contractor’s All Risks (CAR) policy if you are RIAI-contracting. Either way, budget €1,800 minimum, and check the policy explicitly covers the works.
8. Soft furnishings, white goods, and the “moving-back-in” spend. The bit nobody warns you about. New blinds, new curtains, fridge-freezer, washing machine, oven, hob, dishwasher, tumble dryer, bathroom mirrors, bathroom accessories, light fittings (often excluded from the electrical quote), the cost of re-establishing broadband (Eir / Virgin / Sky), re-keying the locks, painting the rooms you said you’d do yourself. Realistic total for a 4-bed: €10,000–€18,500.

Sum the hidden-cost lines and you typically add 22–32% to the headline build figure before VAT. Build that into your budget from day one. Our calculator surfaces these as a separate line so you cannot accidentally ignore them.

How to read an Irish contractor’s quote

A well-formed Irish contractor’s quote has eight things. Walk down this checklist for any quote you receive; if a quote is missing more than two of them, send it back for revision before signing.

• Itemised line items, not lump sums. A quote that reads “Build to drawings, €215,000” is not a quote, it is a guess. You want lines for groundworks, structural steels, electrics, plumbing, second-fix carpentry, decorating, scaffold, skips, etc., each with a separately stated value.
• Explicit contingency line. Industry standard is 10% minimum. If the quote doesn’t state contingency, ask the contractor to break it out.
• VAT treatment stated. “Quote inclusive of VAT at 13.5%” or “Quote exclusive of VAT” on the first page. The 13.5% reduced rate applies because the contractor is supplying labour and materials together; you should never see 23% on a labour line.
• Provisional sums itemised. If the kitchen units are not yet chosen, the quote should include a Provisional Sum for kitchen supply (e.g. “PS €28,000 for kitchen supply, ex-VAT”) which gets reconciled at the actual order value.
• Payment schedule with stage gates. Never pay more than 10% deposit. A typical schedule on a 6-month project runs 10% on signature, then 6–8 monthly stage payments on certified work, and a 5% final retention held for 6 months after practical completion.
• Programme attached. A week-by-week Gantt is ideal; a milestone date table is the minimum.
• Contract terms stated. RIAI Domestic Building Agreement is the standard for smaller renovations. RIAI Yellow Form for larger contracts. Avoid bespoke contractor terms; they almost always disadvantage you.
• BCAR Assigned Certifier and Tax Clearance. If the work requires planning permission or exceeds 40 m² extension, the contractor must name the Assigned Certifier on the quote. The contractor must also provide a current Tax Clearance Certificate and a C2 certificate of subcontractor compliance.

What about SEAI grants?

Several Irish SEAI grants meaningfully reduce renovation cost in 2026, particularly the energy-efficiency stack. The One Stop Shop service bundles multiple grants into a single application for whole-home upgrades. Headline 2026 grant rates:

• Air-source heat pump: up to €6,500 (One Stop Shop) or €4,500 (Better Energy Homes).
• External Wall Insulation: up to €11,000 for a detached property (2026 rate).
• Cavity wall insulation: up to €1,700.
• Attic insulation: up to €1,500.
• Solar PV: up to €1,800.
• Whole-home BER A bonus: additional €2,000 on top of stacked grants if you reach A rating.

Full breakdown of which grants stack and how to claim each one is in our dedicated SEAI grant finder. A typical Dublin whole-home upgrade qualifying for a BER B2 result attracts €18,500 – €28,500 of stacked grant offset in 2026.

How long should a renovation take?

Headline rule of thumb for 2026: budget 10 weeks of preparation for every €100k of build cost (architect / planning / structural / tendering / BCAR), then a build phase of roughly 4 weeks per €25k for fast-tracked structural work, or 4 weeks per €18k for a full gut where you are stripping and rebuilding inside an existing envelope.

A typical structural renovation of a Dublin 4-bed semi (build cost €265k, no extension): 14 weeks pre-construction (including the 8-week planning permission window), 28 weeks on site, 4 weeks snagging and final account. Total 46 weeks — roughly 11 months from architect instruction to moving back in. A full gut with a rear extension on the same property runs 16–22 months end to end.

Detailed week-by-week schedules for each project size are in our Irish renovation timeline guide.

Putting it all together

The price you actually pay for an Irish renovation in 2026 is the sum of: SCSI-mean build cost for your m² × regional uplift factor × spec tier multiplier, plus 25% professional fees and BCAR, plus 13.5% VAT, plus 10–15% contingency, plus the eight hidden lines above, minus any SEAI grants you stack.

For a typical South County Dublin 4-bed structural-plus-BER-B2 renovation in 2026, that arithmetic lands roughly: €295,000 build · +28% regional uplift = €378,000 · +13.5% VAT = €429,000 · +15% professional fees + BCAR = €493,000 · +12% contingency = €552,000 · +€15,000 hidden costs · −€18,500 SEAI grants = roughly €548,500 fully loaded. The headline SCSI number got you to €295k; the realistic out-turn was 85% higher.

This is why we built the calculator to walk you through every line. The arithmetic isn’t hard. The discipline of doing it explicitly is what stops an Irish renovation budget overrunning.

Frequently asked questions

How much does it cost to renovate a 4-bedroom house in Ireland in 2026?

Typical 4-bedroom semi (125–155 m²) in 2026: €110,000–€175,000 for a moderate refresh, €215,000–€315,000 for a structural renovation with kitchen/bathroom replacement and BER upgrade to B2, and €375,000–€515,000 for a full gut to mid-range spec including new electrics, plumbing, heat pump, MVHR, triple-glazed windows and external wall insulation. South County Dublin (D4, D6, D14, D18) runs roughly +20 to +30% on these bands; rural Connacht and Ulster roughly −15 to −25%. See the regional table above.

What is the average Irish renovation cost per square metre in 2026?

SCSI Nov 2025 mid-range for residential renovation sits at €2,250–€3,150 per m² ex-VAT nationally, with regional spread of roughly ±35%. The figure includes labour, materials and a 10% contingency; it excludes professional fees (architect 6–10%, structural engineer €1,500–€3,500, BCAR Assigned Certifier €2,500–€6,500), VAT (13.5% on most renovation labour and materials in Ireland under the reduced rate), the SEAI grant offsets (deducted from the gross), and any planning application costs.

How much VAT do I pay on a house renovation in Ireland?

Ireland applies the reduced 13.5% VAT rate to most labour and materials supplied as part of a residential renovation. Materials bought separately by the homeowner (DIY) attract the standard 23% rate; let the contractor purchase the materials on your behalf and the whole package becomes 13.5%. Two further reliefs apply: the Home Renovation Incentive (HRI) was withdrawn after Dec 2018 and has not been reinstated as of 2026; the Help to Buy scheme applies only to new-build dwellings under €500k. Confirm the rate with your contractor in writing before invoicing.

How much does an extension cost in Ireland in 2026?

Single-storey rear extension to mid-range spec: €2,450–€3,250 per m² ex-VAT including foundations and finishes (SCSI Nov 2025 + Engineers Ireland day-rate guidance, restated). Two-storey extension: €2,100–€2,950 per m² (the foundation per-m² cost falls because the same slab supports more floor area). Attic conversion with dormer: €58,000–€110,000 for a typical 4-bed Dublin semi including BCAR compliance. Add 10–15% if architect-designed and structurally engineered. Add another 15–25% for kitchen-extension fit-out.

Do I need planning permission for a house renovation in Ireland?

Most internal renovations do not require planning permission and may be exempted development under the Planning and Development Regulations 2001 (as amended). However: any change of use, anything that materially affects the external appearance, any first-floor or attic extension beyond 12 m², any rear extension beyond 40 m², any structure within an Architectural Conservation Area or affecting a Protected Structure, and any work on shared boundary walls in apartments DOES require permission. Apply for a Section 5 declaration from your local authority (€80) if you are uncertain — it confirms in writing whether the work is exempt. Householder planning application is €65.

What is BCAR and do I need to comply?

Building Control (Amendment) Regulations 2014 (BCAR) impose a statutory inspection regime on any work that requires planning permission, plus any extension over 40 m². You must appoint an Assigned Certifier (chartered architect, surveyor or engineer registered with the Building Control Authority) and a Design Certifier; you must file a Commencement Notice and (typically) opt-in to the statutory inspection plan; and you must lodge a Certificate of Compliance on Completion. The combined professional fee package runs €2,500–€6,500 over and above the build cost and is non-negotiable for any qualifying works.

This guide is part of an Ireland-wide reference covering planning permission, SEAI grants, contractor quote analysis and timeline planning. Explore the rest of the guides library or jump straight to the renovation calculator.