Replacing windows is a major home upgrade—important for energy efficiency, comfort, property value, and “curb appeal”. But how much does window replacement cost in Ireland in 2025? Below is a breakdown of average costs, what influences the price, and how to budget wisely.
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Window Replacement Costs – Key Summary
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Typical cost range per window: €450 – €1,700
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Lower end: uPVC casement windows with standard double glazing
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Higher end: Large sash windows, aluminium or timber frames, bay and bow windows, or triple glazing
For most homeowners, replacing an average-sized casement window will cost between €450 and €1,200, while premium or large windows can push toward €1,500–€1,700+ each.
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Instead of spending time searching, we make it easy to find local services for:
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Cracked or broken glass
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Fogged or misted double glazing
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Draughty seals and leaks
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Hinges, locks, and handles that don’t work properly
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Wooden sash window refurbishment
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Door glass and frame repairs
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Full window and glazing installations
We don’t carry out the work ourselves — we link you with Dublin-based businesses who do. Whether it’s a small residential fix, a bigger repair, or a full installation, you’ll find services ready to help.
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Cost by Material, Window Type, and Size
Per window costs (including installation):
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uPVC casement: €450 – €560
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Wooden casement: €800 – €1,000
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Aluminium casement: €850 – €1,000
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uPVC sash: €800 – €1,000
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Wooden sash: €1,250 – €1,700
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Larger or specialty windows: €1,500 – €3,500+
Whole-house examples:
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3-bed semi-detached house (around 9 windows) with uPVC: €3,500 – €4,000
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Same house with timber or sash windows: €7,200 – €15,300
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Detached house with 12–15 uPVC windows: €5,900 – €6,600
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8 windows replaced (mixed materials): €3,500 – €10,000
What Drives the Cost?
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Window size and shape – Larger or custom designs like bays and bows are more expensive.
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Material – uPVC is cheapest, wood and aluminium are pricier.
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Glazing type – Triple glazing, low-E coatings, or acoustic glass add €100–€200+ per window.
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Installation complexity – Removing old units, repairing frames, or difficult access adds cost.
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Extras and finishing – Plastering, trims, sealing, or hardware can add €50–€200 per window.
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Bulk installations – Replacing multiple windows at once lowers per-window cost.
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Grants – SEAI energy grants can reduce overall spend.
Related: Is it better to fix a new window or replace it?
Typical Costs for Glass and Glazing Types
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Double glazing: €100 – €180 per m² (plus labour)
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Triple glazing: €150 – €250 per m² (+ €50–€75 per m² for fitting)
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Low-E glass / coated glass: €120 – €200 per m² (+ €45–€65 per m² for fitting)
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Laminated or safety glass: €90 – €150 per m² (higher installed cost depending on spec)
Example Budgets
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Small bathroom window (standard uPVC, double glazed): €450 – €800
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Four standard bedroom windows (uPVC casement): €1,800 – €2,500
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Large bay or living room window (aluminium or timber): €1,500 – €3,500+
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Full house (9–15 windows, mix of materials): €6,000 – €15,000+
Hidden Costs to Consider
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Removing and disposing of old windows
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Repairs to walls, frames, or sills
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Internal finishing (plaster, paint)
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External trims and sealing
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Upgraded locks and handles
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VAT and possible permits
These extras can add €50–€200 per window depending on the situation.
Tips to Save Money
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Get at least three quotes from local installers.
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Stick to standard window sizes where possible.
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Use uPVC for cost efficiency and reserve timber/aluminium for premium finishes.
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Replace multiple windows at once for bulk discounts.
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Check for SEAI grants on energy-efficient upgrades.
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Watch for off-season discounts from suppliers.
Frequently Asked Questions
How much does it cost to replace one window in Ireland?
Replacing a standard uPVC window costs €450–€800. Wooden or aluminium windows range from €850–€1,700.
How much does it cost to replace all the windows in a 3-bed semi-detached house?
Replacing 9 windows with uPVC double glazing costs €3,500–€4,000. Using timber or sash windows costs €7,000–€15,000+.
Is it cheaper to repair windows or replace them?
Repairs are usually cheaper—for example, replacing a fogged double-glass unit instead of the entire frame. Replacement is best when frames are damaged or energy upgrades are needed.
Is triple glazing worth it in Ireland?
Triple glazing costs €150–€250 per m², about 20–30% more than double glazing. It offers better insulation and noise reduction, but high-quality double glazing is still sufficient for many homes.
Are grants available for window replacement in Ireland?
Yes. The SEAI Home Energy Grants help with energy-efficient upgrades, including new windows. Check the SEAI website for current eligibility.
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