How much is the windows grant in 2026?
€4,000 for a detached house, €3,000 for a semi-detached or end-of-terrace house, €1,800 for a mid-terrace and €1,500 for an apartment.
SEAI windows and doors grant guide
Windows and doors grant in Ireland (2026)
What the SEAI windows and doors grant pays, the insulation rule that decides who qualifies, what the new windows must meet and how to apply.
Quick answer: SEAI pays up to €4,000 for replacement windows in a detached house (€3,000 semi-detached or end of terrace, €1,800 mid-terrace, €1,500 apartment) and €800 per external door, up to two doors. The home must have been built and occupied before 2011 and have good attic and wall insulation, and the new windows and doors must have a U-value of 1.4 or better.
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At a glance
| Windows grant | €4,000 detached · €3,000 semi-d or end of terrace · €1,800 mid-terrace · €1,500 apartment |
|---|---|
| Doors grant | €800 per external door, up to 2 doors (€1,600) |
| Windows, doors or both | You can apply for either grant or both. You don’t have to replace every window |
| Home must be | Built and occupied before 2011, with good attic and wall insulation |
| New windows and doors | U-value of 1.4 W/m²K or lower, replacing single or double glazing and inefficient doors |
| After the work | A post-works BER showing a Heat Loss Indicator of 2.3 or lower, or attic and walls rated Good or Very Good |
| Extensions | Covered if the extension was built before 1 January 2011 |
How much is the windows and doors grant?
| Home type | Windows | External doors |
|---|---|---|
| Detached house | €4,000 | €800 per door, up to 2 |
| Semi-detached or end of terrace | €3,000 | €800 per door, up to 2 |
| Mid-terrace | €1,800 | €800 per door, up to 2 |
| Apartment | €1,500 | €800 per door, up to 2 |
Source: SEAI windows and doors grant page, checked 25 September 2026. The grant can never be more than the cost of the work, and it is paid once per property.
The windows and doors grant opened in March 2026. You can claim the windows grant, the doors grant or both, and you don’t have to replace every window to qualify. The grant is paid once per property, so plan the whole job before you apply.
The insulation rule: does my home qualify?
SEAI only pays for new windows and doors in a home that already holds its heat reasonably well. Your home needs good attic and wall insulation. You can check this three ways:
- Earlier SEAI grants: if the home already had SEAI grants for attic and wall insulation, the insulation is in place.
- Your BER advisory report: if it rates your attic and walls as “Good” or “Very Good”, you meet the rule. Our BER guide shows how to find it with your MPRN.
- A BER assessor: they can review an older BER or do a pre-works assessment.
If your attic or walls fall short, you can insulate them in the same project, with their own attic and wall grants. All the grants are paid together once everything is finished.
Explore windows and doors in 3D, then compare grants, conditions and typical costs.
Check my grantsWhat the new windows and doors must meet
- Performance: a U-value of 1.4 W/m²K or lower (for example 1.3). The lower the U-value, the less heat escapes.
- Post-works BER: after the work, a BER must show a Heat Loss Indicator of 2.3 or lower, or attic and walls rated Good or Very Good. The post-works BER is grant-aided.
- Ventilation: any room with an open-flued appliance, such as an open fire, needs a permanent vent. Your contractor can advise.
- Safety: windows with a drop of more than 1.4m outside need restrictors, and escape windows must meet the emergency escape rules.
What do replacement windows and doors cost?
Prices vary a lot with the number and size of windows, frame material (uPVC, aluclad or timber), glazing and finishing. Get at least two written quotes that list each window and door, its U-value, the fitting and making-good work, and the grant the contractor is quoting against.
You pay the contractor in full and SEAI pays the grant into your account once the work is done and the paperwork is in. Some registered contractors take the grant off their price instead: you then name their bank account for the grant on SEAI’s payment form. Ask when you get quotes.
How to apply for the windows and doors grant
For planned work, apply and accept your SEAI grant offer before ordering materials or starting. SEAI also publishes a provision for windows or doors ordered or started on or after 27 January 2026, subject to the scheme requirements and use of a registered contractor. If you have already ordered or started, ask SEAI and your registered contractor to confirm how this applies to your case before relying on grant support.
Windows application timing checked against SEAI’s windows and doors guidance, its timing explainer and the application steps in its leaflet (PDF, page 5).
Check the insulation rule
Look at your BER advisory report or past SEAI grants. If you need to, plan attic or wall insulation into the same project.
Get quotes from SEAI-registered contractors
Choose a contractor registered for windows and doors, and get a written contract for the work, price, timing and warranty.
Apply online and accept your grant offer
For planned work, accept the offer before ordering materials or starting. If you have already ordered or started, confirm the timing provision above with SEAI and your registered contractor.
Get the windows and doors fitted
You have 8 months from the offer to finish the work.
Book a post-works BER
It must show a Heat Loss Indicator of 2.3 or lower, or attic and walls rated Good or Very Good.
Submit the paperwork and get paid
Send the signed Declaration of Works and Request for Payment. SEAI usually pays within 4 to 6 weeks and may inspect.
Your home in 3D
Explore the upgrades before you decide.
Select an upgrade on our 3D home to compare grant options, conditions and typical costs. When you are ready, choose the work you want and request a quote from one registered contractor who covers your county. The figures are guidance; your contractor checks the work and SEAI decides grant eligibility.
Frequently asked questions
How much is the grant for doors?
€800 per external door, for up to two doors, so up to €1,600.
Do I have to replace all my windows?
No. You don’t have to replace every window. The grant is paid once per property, and the post-works heat loss rule must still be met.
Can I get the grant for windows already fitted or ordered?
For planned work, apply and accept your grant offer before ordering materials or starting. SEAI publishes a specific provision for windows or doors ordered or started on or after 27 January 2026, subject to scheme requirements and use of a registered contractor. Ask SEAI and your registered contractor to confirm your individual case before assuming completed or ongoing work qualifies.
Does my home need to be insulated first?
Your home needs good attic and wall insulation, but you can do the insulation in the same project as the windows and doors. Each has its own grant.
Can I get the grant for windows in my extension?
Yes, if the extension was built before 1 January 2011. Extensions built after that date are not eligible.
Can HomeGrants help with windows and doors?
Yes. Open windows and doors in our 3D home explorer to review the grants, insulation conditions and typical costs. When you’re ready, request a quote from one SEAI-registered contractor who covers your county. Your installer checks the home and grant requirements; the explorer does not replace that assessment.
Related guides
Sources and review
We checked this guide against the official pages below on . Grant rules change, so the official source always has the final word.