Casement windows in Donegal
Casement window supply and fitting across Co. Donegal, covering Letterkenny, Buncrana, Ballybofey, Carndonagh. A white A-rated uPVC casement window is €350 to €850 supplied and fitted, a flush sash casement is €750 to €1,300, and a typical Donegal 3-bed semi (13.89 m² median BER window area) runs €4,500 to €8,800 before the €3,000 SEAI grant.
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- €350 to €850per white uPVC casement window, supplied & fitted
- 59%of pre-2011 Donegal BER homes have older double glazing
- 13.89 m²median window area on a Donegal semi-D BER
- 2,211heating degree days near Letterkenny
What casement windows cost in Co. Donegal
On SEAI's BER register for pre-2011 homes in Co. Donegal, a typical semi-detached house has a median 13.89 m² of window area and a detached house has 22.08 m². At our installed guide prices per window and per square metre, replacing all casement windows in Co. Donegal typically costs:
| Casement frame & glass | Single window (fitted) | Donegal semi-D (13.89 m²) | Donegal detached (22.08 m²) |
|---|---|---|---|
| White uPVC casement (double glazed, Uw ≤ 1.4) | €350 to €850 | €6,250 to €10,418 | €9,936 to €16,560 |
| Coloured or triple-glazed uPVC (Uw 0.8) | €550 to €1,100 | €9,028 to €13,196 | €14,352 to €20,976 |
| Flush sash casement (timber-look exterior) | €750 to €1,300 | €10,418 to €15,001 | €16,560 to €23,846 |
| Thermally broken aluminium casement | €700 to €1,550 | €12,501 to €19,446 | €19,872 to €30,912 |
Our sums from Co. Donegal's median BER window area, inclusive of 13.5% supply-and-fit VAT. Subtract €3,000 (semi-D) or €4,000 (detached) if claiming the 2026 SEAI Windows Grant.
BER glazing figures and towns in Co. Donegal
- 59%older double glazing on pre-2011 Donegal BERs (10th of 26)
- 5.7%still with single glazing
- 30%of Donegal homes built 1981–2000 (CSO Census)
- 70%detached houses in the county
Across Co. Donegal, 64% of pre-2011 homes on the BER database still have older double glazing (U-value 2.5 to 4.0 W/m²K) or single glazing (4.0+ W/m²K), with a county median window U-value of 2.7 W/m²K. Because 30% of Donegal homes were built between 1981 and 2000 and 33% before 1981, thousands of early aluminium and first-generation uPVC casements now have dropped friction hinges, perishing rubber gaskets and misted double-glazed units.
Near Letterkenny, a normal year brings 2,211 heating degree days (the coldest of the 26 county towns). Replacing 2.7+ W/m²K windows with A-rated casements at 1.2 W/m²K (double) or 0.8 W/m²K (triple) cuts window heat loss by 55% to 70%.
Main towns covered in Co. Donegal (Census 2022 population): Letterkenny (22,549), Buncrana (6,971), Ballybofey (5,406), Carndonagh (2,768), Donegal (2,749), Bundoran (2,599).
Casement Window coverage across every town in Co. Donegal
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Local casement window coverage across Co. Donegal includes Letterkenny, Buncrana, Ballybofey & Stranorlar, Donegal Town, Ballyshannon, Bundoran, Carndonagh, Gweedore & Derrybeg, as well as Lifford, Moville & Greencastle, Killybegs, Ramelton & Milford, Dungloe, Raphoe & Convoy, Muff & Burnfoot, Ardara & Glenties and surrounding rural townlands.
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Donegal casement window questions
How much do casement windows cost in Donegal?
In Co. Donegal, a white A-rated uPVC casement window costs €350 to €850 supplied and fitted, a flush sash casement costs €750 to €1,300, and an aluminium casement costs €700 to €1,550. A typical Donegal semi-D (13.89 m² of window) runs €6,250 to €10,418 in uPVC.
Can I get the SEAI Windows Grant in Donegal?
Yes. The 2026 SEAI Windows Grant applies across Co. Donegal: €4,000 for a detached house, €3,000 for a semi-D or end-terrace, €1,800 for a mid-terrace, and €1,500 for an apartment on pre-2011 homes meeting the BER heat-loss requirement.
Which towns in Co. Donegal are covered?
All of Co. Donegal, including Letterkenny, Buncrana, Ballybofey, Carndonagh, Donegal and surrounding areas. Your request goes to one vetted window company covering your county.
Should I pick double or triple glazed casement windows in Donegal?
With 2,211 heating degree days near Letterkenny, triple-glazed casement windows (0.8 W/m²K, €550 to €1,100 per window) are strongly recommended for north- and east-facing rooms, exposed rural sites and homes upgrading to a heat pump.
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