The average cost of uPVC double-glazed windows in Ireland is approximately €600 to €1,200 per window fitted, while a standard composite door costs between €800 and €1,500 fitted, according to the Sustainable Energy Authority of Ireland (SEAI, 2026).
Prices vary depending on material, uPVC is generally cheapest, aluminium mid-range, and timber most expensive. Labour, glazing type (A-rated versus C-rated), and property size also affect totals. These figures exclude SEAI grants, which can reduce costs by up to €2,400 for qualifying homes.
Material options directly affect the final price
uPVC windows are the most affordable, typically costing €450–€900 per window fitted. Aluminium windows range from €700–€1,500 per window, while timber windows cost €1,000–€2,000 or more. For doors, uPVC composite styles start at €800 fitted, aluminium doors average €1,200–€2,000, and solid timber doors can exceed €2,500. The Irish Building Regulations 2023 require a minimum U-value of 1.4 W/m²K for windows and 1.6 W/m²K for doors, which influences glazing choices and costs.
SEAI grants can significantly reduce your outlay
The SEAI offers a grant of up to €2,400 for replacing windows and doors in homes built before 2011, provided the new units meet minimum energy standards. For a typical three-bedroom semi-detached house, this could cover 30–50% of total costs. The grant is paid after installation and inspection by a registered SEAI contractor. Check eligibility at SEAI, 2026. Without a grant, a full replacement for a three-bed home can cost €8,000–€15,000.
Installation and additional extras add to the bill
Fitting costs are usually included in per-unit prices, but complex jobs, such as non-standard openings, Georgian bars, or triple glazing, add €100–€300 per window. Lead times average 4–8 weeks. Always obtain at least three itemised quotes from TrustMark-registered or SEAI-accredited installers. Remember that cheaper quotes may use lower-grade hardware or thinner frames, so compare U-values and warranties (typically 10 years) before deciding.
A worked example
For a typical 3-bedroom semi-detached house in Dublin built in the 1980s, replacing 10 uPVC double-glazed windows and one composite front door costs roughly €9,500 fully fitted after an SEAI grant of €2,400. The Energy Saving Trust’s Irish counterpart confirms that upgrading from single glazing to A-rated double glazing cuts heat loss by up to 74%, saving an average household around €300 per year on heating bills. At that saving rate, the payback period is about 32 years, though the real value comes from increased comfort, reduced condensation, and a higher BER rating that can add up to 5% to your property value. The 25-year lifetime savings on energy alone total approximately €7,500, not accounting for future energy price rises. SEAI grant eligibility requires a BER assessment and a registered contractor.
| Item | Figure |
|---|---|
| Upfront cost after grants | €9,500 |
| Yearly savings | €300 |
| Payback period | 32 years |
| 25-year lifetime savings | €7,500 |
What homeowners often get wrong
The most common mistake is assuming all double glazing is the same performance level. Here are three frequent errors that cost Irish homeowners money and comfort.
- Choosing the cheapest U-value Many buyers pick the minimum legal U-value of 1.4 W/m²K, but opting for 1.0 W/m²K or lower saves an extra €100 per year on heating. The mistake adds €3,200 in wasted energy costs over 25 years.
- Ignoring SEAI grant eligibility Homeowners often proceed without checking if their property qualifies for the €2,400 grant. Missing this deadline means losing a direct reduction that could cover 25% of the total cost.
- Skipping professional installation for price Using an uncertified fitter to save €500 can void the SEAI grant and the manufacturer’s warranty. A failed installation leads to draughts and condensation, costing €1,000 in repairs later.
Quick reference
- uPVC windows in Ireland cost €450 to €900 per window fitted, with aluminium and timber options costing significantly more.
- The SEAI grant covers up to €2,400 for window and door replacements in homes built before 2011.
- Irish Building Regulations 2023 require a minimum U-value of 1.4 W/m²K for windows and 1.6 W/m²K for doors.
- Upgrading from single glazing to A-rated double glazing can reduce heat loss by up to 74%.
- Always use an SEAI-registered contractor to qualify for the grant and maintain warranty validity.
Frequently Asked Questions
A standard uPVC double-glazed window costs €600–€1,200 fitted, and a composite door costs €800–€1,500 fitted, according to the Sustainable Energy Authority of Ireland (SEAI, 2026).
Yes, the SEAI offers a grant of up to €2,400 for replacing windows and doors in homes built before 2011. The grant is paid after installation by a registered SEAI contractor.
uPVC is the cheapest material for windows and doors in Ireland, with windows from €450 and doors from €800 fitted. Aluminium and timber are more expensive options.
