SEAI now grant-aids replacement windows and external doors as part of its home energy upgrade supports. The window grant scales with house type, and the external door grant covers up to two doors per home. SEAI offers individual applications as well as a managed One Stop Shop route.
Route correction, 1 October 2026: this page previously described these grants as One Stop Shop-only. See SEAI’s current windows and doors criteria for the individual route, insulation requirements and post-works BER conditions. The remaining cost and specification guidance awaits a full editorial review.
How much is the window grant?
Older single-glazed or early double-glazed windows are a major source of heat loss. Replacing them with high-performance glazing improves comfort and your BER. The grant value depends on your house type, since a detached home has far more window area than an apartment.
| House type | Window grant |
|---|---|
| Detached | €4,000 (manual, 2026-06-12) |
| Semi-detached | €3,000 (manual, 2026-06-12) |
| Mid-terrace | €1,800 (manual, 2026-06-12) |
| Apartment | €1,500 (manual, 2026-06-12) |
Source: Source: SEAI, source date 12 June 2026 (manually researched) .
How much is the external door grant?
The external door grant is a flat amount per door, capped at two doors per home.
| Measure | Grant |
|---|---|
| External doors (max 2) | €800 (manual, 2026-06-12) |
Source: Source: SEAI, source date 12 June 2026 (manually researched) . If your property has three or more external doors, you still claim for a maximum of two.
Eligibility
To qualify for the window and door grants:
- Your home must have been built and occupied before 2011.
- You must own the property (owner-occupiers and landlords qualify).
- Use a registered contractor for an individual application, or a One Stop Shop to manage it.
- Check the required attic/wall insulation, window and door performance, ventilation and post-works BER criteria on the official scheme page.
- You cannot have already claimed the same measure for this home.
For the full set of rules across all measures, see our SEAI grant eligibility guide.
Choose how to manage the application
You can apply yourself using a registered contractor, or use a One Stop Shop. The individual route normally pays after completion and submission of the required documents; the managed route deducts the grant upfront. Obtain the grant offer before starting works and confirm the payment arrangement in writing.
Read our One Stop Shop vs individual grants comparison to separate the choice of scheme from the service you are buying.
What it actually costs
The grant offsets part of the bill, not the whole thing. Replacing windows across a typical home runs well above the grant value, so treat the grant as a contribution rather than full funding. Our window replacement cost guide gives realistic price ranges by house size and glazing type, so you can budget the net figure after the grant.
A new BER after the works will capture the improvement; see BER ratings for how the rating is calculated.
Tips before you commit
- Get comparable quotes from registered contractors or One Stop Shops; pricing and lead times vary.
- Prioritise the worst-performing windows first if budget is tight.
- Consider doing windows alongside insulation so you only disturb the home once.
- Confirm the door grant covers your chosen doors before ordering.
Check what you can claim
Window and door grants depend on your house type and age, so confirm your numbers before contacting a provider.