Window Replacement guides, calculator & reference
Every window replacement cost guide, specification comparison, interactive calculator, FAQ and technical glossary on windowreplacement.ie in one place.
Browse the guides below or jump straight to the interactive calculator on the homepage.
Free, no obligation. One vetted installer covering your county replies, not five.
Core window replacement guides
Detailed guides covering prices, specifications and what to check before you book.
Full-house window replacement cost3-bed semi-detached €4,500 to €7,800, 4-bed detached €6,800 to €11,900, single window €420 to €780, and what moves your quote.See all prices →
Triple glazing vs double glazingWhy 40mm–44mm argon triple glazing (0.8 W/m²K) eliminates cold downdraughts beside sofas and beds for only +12%–15% more.Triple glazing guide →
A-rated uPVC casement & flush sashMulti-chamber uPVC frames from €4,500 to €7,800 for a full 3-bed semi-D, available in smooth white, Anthracite Grey and heritage flush sash.uPVC windows guide →
Aluclad timber-aluminium windowsWarm factory-lacquered Nordic pine or oak inside with maintenance-free powder-coated aluminium armour outside.Aluclad guide →
Sliding sash window replacementDouble- and triple-glazed spring-balanced sash windows (€950 to €1,750 per window) for Georgian, Victorian and country cottages.Sash window guide →
Composite front doors & sidelightsSolid-core PAS 24 high-security composite entrance doors (€1,850 to €3,200 supplied & fitted) with triple-glazed sidelights.Composite doors guide →Calculators, FAQ and glossary
| Resource | What's inside | How it helps |
|---|---|---|
| Interactive Cost Calculator | Live price range | Select your specification options to get an instant Irish guide price. |
| Master FAQ Hub | 11 questions answered | Straight answers on pricing, preparation, timelines, rules and aftercare. |
| Technical & Trade Glossary | 15 terms defined | Plain-English definitions of every window replacement specification and standard. |
| All 26 Counties Index | 26 county pages | Local housing data and one vetted window and door installer covering your county. |
Real examples and installation detail
Get a window replacement quote for your home
Pick your job, house size and county. Your enquiry goes to one vetted window and door installer covering your county, who measures up and gives you a fixed written price.
Related 2026 Ireland Specialist Cost & Technical Guides
Cross-referenced Irish pricing benchmarks, SEAI/Revenue grant rules, and county specifications from partner reference hubs:
- Aluclad Windows Ireland (alucladwindows.ie) — 2026 Ireland Cost & Spec Guides: Aluclad windows in all 26 counties of Ireland: our supplied-and-fitted price guide for Scandinavian timber-aluminium alu-clad windows (€1,100 to €2,00
- Casement Windows Ireland (casementwindows.ie) — 2026 Ireland Cost & Spec Guides: Casement windows in all 26 counties of Ireland: our supplied-and-fitted price guide for side-hung, top-hung and flush casement windows in uPVC (€350 t
- Dormer Windows Ireland (dormerwindows.ie) — 2026 Ireland Cost & Spec Guides: Dormer windows in all 26 counties of Ireland: our supplied-and-fitted price guide for dormer bungalow window replacement (€450 to €1,250 per window, o
- Bifolding Doors Ireland (bifoldingdoors.ie) — 2026 Ireland Cost & Spec Guides: Bifolding doors in all 26 counties of Ireland: our supplied-and-fitted price guide by panel count (2-pane to 6-pane thermally broken aluminium and alu
- Driveway Gates (drivewaygates.ie) — 2026 Ireland Cost & Spec Guides: Driveway gates in Ireland: our fitted price guide for swing, sliding, manual and electric gates in steel, aluminium and timber, gate motors and repair
Window replacement guides & price breakdowns
Straight answers to what people ask most: itemised costs, specifications, planning or grants, and what to check before you book.
More guides & resources: All guides & calculator hub · Technical & trade glossary · Frequently asked questions · All areas covered · About this site
Questions homeowners ask
How much does it cost to replace all windows in a 3-bed semi-detached house in Ireland?
Supplying and fitting 8 to 10 A-rated uPVC windows in a typical 3-bed semi-detached house in Ireland costs €4,500 to €7,800 in smooth white, €5,400 to €9,200 in dual-colour foiled uPVC (such as Anthracite Grey outside and white inside), or €10,500 to €16,800 in triple-glazed Scandinavian aluclad, including removal of old frames, reveal plastering and 13.5% VAT.
Is triple glazing worth the extra cost over double glazing in Ireland?
Yes. Upgrading a full house from A-rated double glazing (1.2 W/m²K) to 40mm–44mm argon triple glazing (0.8 W/m²K) typically adds just 12% to 15% (€600 to €1,100 on a 3-bed semi-detached house), raises internal glass surface temperature to ~18.4°C in winter, stops morning condensation and cuts street noise.
Can I get the SEAI grant for replacing my windows and doors?
Under SEAI rules, the Windows Grant (€1,500 apartment, €3,000 mid-terrace, €3,500 semi-detached, €4,000 detached) and Doors Grant (€800 per door for up to 2 doors) are available for pre-2011 homes achieving Uw ≤ 1.4 W/m²K as part of a whole-house upgrade reaching at least a B2 BER and Heat Loss Indicator (HLI) ≤ 2.0. If your home only needs windows and doors, booking directly with an independent installer often costs less out of pocket than a One Stop Shop package.
How long does a full-house window replacement take?
Once your windows are laser-measured at survey, custom factory manufacture takes 3 to 6 weeks. On-site installation in a lived-in 3-bed semi-detached house takes 2 days (or 3 days for a large 4–5 bed detached house), fitting room by room so your home is never left open overnight.
Window replacement across all 26 counties
Requests from all 26 counties go to one vetted local specialist who covers your county — from Dublin, Cork, Galway and Limerick to Kildare, Meath, Wicklow, Waterford and Donegal. Pick your county below for local prices, specifications and advice. Compare all areas covered →
Want a measured written price for your windows?
One vetted installer covering your county visits to laser-measure every opening, show you frame and handle samples, and give you a fixed written quote.