How Much Does Window Replacement Cost in Ireland? (2026 Price Guide)

While the table above gives a quick sense of costs, your final bill will depend on several key choices. Here’s what typically impacts pricing most for Irish window replacement in 2026:

• Material: uPVC is the most budget-friendly and low-maintenance, followed by aluclad (timber with aluminium exterior), full aluminium, and then timber at the highest end.
• Glazing: Standard double glazing is now the norm, but opting for triple glazing adds €100–€200 per window, delivering energy gains especially in exposed locations.
• Window style: Simple casement windows are cheapest. Sliding sash, bay, bow, and specialised designs cost more due to their complexity and size.
• Size and quantity: Larger windows and more openings increase the total; a typical 3-bed semi with 8–10 windows is a useful benchmark for full house projects.
• Installation complexity: Hard-to-reach windows or those requiring changes to the structure (like altering window openings) will add to the labour and potentially require additional trades.

For homeowners looking to upgrade every window, budgeting by the size and style of your property is essential. In Ireland, the average price for a full window replacement in a standard 3-bedroom semi-detached house is now between €12,000–€15,000, covering 8–10 windows. This includes supply and professional installation. Larger detached homes, windows with more intricate designs, or upgrades to high-performance glazing will push costs higher.

Where you live matters. Labour and operational costs in Dublin are typically higher than the rest of the country, so expect the price per window to be at the upper end of the ranges shown if you’re in the capital or major urban centres. Rural and smaller-town installations may benefit from slightly lower rates. Still, getting at least three written quotes is always wise to check your local market.

Window replacement grants from the SEAI (Sustainable Energy Authority of Ireland) can cover a significant portion of your costs in 2026. Currently available grants are as follows:

• Detached house: Up to €4,000
• Semi-detached or end-terrace: Up to €3,000
• Mid-terrace: Up to €1,800
• Apartment/duplex: Up to €1,500

You’ll need to meet certain qualifying conditions, such as having a home built and occupied before 2011, ensuring your attic and wall insulation are rated Good or Very Good, using windows with a U-value of 1.4 W/m²K or better, and completing a BER (Building Energy Rating) assessment. Work must be completed by an SEAI-registered contractor to claim grant funding.

• VAT is usually charged at 23%; however, some energy-efficiency upgrades may attract a reduced rate. Always check your quote for clarity.
• Factor in any necessary internal or external repairs, like plastering around openings, which may not be included in your initial window quote.
• Apply for SEAI grants as early as possible because funds are limited and the process can take time.
• Always check that your installer is SEAI-registered. This is vital not only for grants but also for peace of mind regarding standards and warranties.
• Choose windows with low U-values for long-term savings and comfort, particularly if you plan further energy improvements such as a heat pump or external insulation.