The windows grant pays a fixed maximum by house type, up to €4,000 for a detached house. The doors grant pays €800 for each eligible external door, up to two doors. Before you order windows, check the property's grant history because the windows grant is available only once per property. For either measure, check the fabric condition in advance because it is confirmed after the works using the new Building Energy Rating (BER) or another route allowed by SEAI. This page covers only the homeowner-managed Better Energy Homes route. One Stop Shop, Warmer Homes and Solar PV use different rules.
Checked against SEAI's published guidance. Last checked 5 August 2026. Amounts are conditional maximums; your Letter of Offer is what counts. Version note: this is a new 2026 measure whose rules have already been revised, with the windows and doors section added to the contractor code in March 2026 and the current code and technical standard both reissued in July 2026, so recheck the current versions and your issued offer before ordering.
The windows amount is fixed by house type. Nothing is costed at application; the grant is capped later by what you actually spend, so if the eligible work costs less than the grant, you receive the lower figure.
| House type | Windows, standard maximum |
|---|---|
| Detached house | €4,000 |
| Semi-detached or end of terrace | €3,000 |
| Mid-terrace house | €1,800 |
| Apartment | €1,500 |
External doors are €800 per eligible door, for a maximum of two doors per property (€1,600). Windows and doors are separate measures: you can apply for either or both.
Unlike the insulation grants, no higher welfare or first-time-buyer band is published for windows or doors. Island homeowners may qualify for additional funding, but SEAI publishes no windows or doors figure for it; ask SEAI before the works. There is also no published cost dataset for this grant yet: SEAI's 2025 median-costs publication predates the measure, which only launched in March 2026.
Sources: SEAI Homeowner Application Guide, p. 5 · SEAI windows and doors grant page · SEAI island listing
SEAI's own FAQ is direct about this: you cannot replace windows in stages and get a grant each time. The windows grant is once-off, and grant history follows the property's Meter Point Reference Number (MPRN, the meter number on the electricity bill), not the owner, so a previous owner's windows grant blocks yours.
What that means in practice: decide the full scope before you claim, because windows left out of your one grant-aided job should not be planned around a second grant later. Whether SEAI will accept a first claim that deliberately covers only some windows is not settled in any published source; one homeowner reported private SEAI confirmation for a partial scope, but nothing published confirms it. If you want a partial scope, get SEAI's written confirmation first.
For doors, the published cap is two eligible doors per property. Whether a homeowner who claims one door can come back later for a second is not published either way; treat the remaining allowance as unconfirmed rather than banked.
Sources: SEAI windows and doors grant page, FAQs · SEAI Homeowner Application Guide, pp. 4 and 8
Sources: SEAI Homeowner Application Guide, pp. 4, 8 and 15–16 · SEAI Contractor Code of Practice v1.19, sections 5.6.1–5.6.3, pp. 35–36
The grant was announced on 27 January 2026 and applications opened on 2 March 2026. SEAI's current FAQ says homeowners who "commenced or ordered" a window or door upgrade since the 27 January announcement "will be eligible to apply", provided scheme requirements are met and a registered contractor did the work. Neither the FAQ nor SEAI's February 2026 blog publishes an end date for that wording.
Treat it carefully, because the published sources leave real gaps:
The date attaches to ordering or commencing the upgrade, not to any offer or application. If you are in this cohort, keep every dated record (quote, contract, deposit, delivery, invoice, photos) and ask SEAI for written confirmation of your own case before relying on the transition; that is prudent recordkeeping, not an official checklist, because SEAI has not published one.
Sources: Government announcement, 27 January 2026 · SEAI blog, 20 February 2026 · SEAI windows and doors grant page, FAQs 2 and 7
Payment requires one of three fabric routes: a Heat Loss Indicator (HLI) of 2.3 W/(K.m²) or lower on the post-works BER, or attic and walls rated "Good" or "Very Good" on a published BER Advisory Report, or existing SEAI grant-aided attic and wall insulation. Where the HLI route is not used, the contractor records the applicable alternative in the Declaration of Works Comment box. The route is confirmed after the works, so a home with poor insulation can fit new windows and then fail the fabric condition with the money already spent.
You can test your position in advance without a new BER: check the property's SEAI grant history for attic and wall insulation, and look at any existing BER Advisory Report for the "Good"/"Very Good" grades. If the position is still unclear, a BER assessor can review an older BER or carry out a pre-works assessment; SEAI recommends this but does not require it. The post-works BER is mandatory either way, and if your attic and walls are not up to standard, insulating them first is the safer sequence.
Sources: SEAI Contractor Code of Practice v1.19, sections 5.6.1–5.6.2, p. 35 · SEAI Homeowner Application Guide, p. 12 · SEAI windows and doors grant page, grant payment criteria
Each grant-aided replacement window must have an independently certified whole-window U-value of 1.4 W/m²K or lower, covering frame and glazing together, and each replacement external doorset must have an independently certified whole-doorset U-value of 1.4 W/m²K or lower. For windows the certification schemes SEAI's standard names are NSAI's Window Energy Performance and BFRC's Window Energy Rating. A brochure saying "A-rated" or "triple glazed" is not the required evidence; the certification is per unit type. The contractor code separately says that where any door is upgraded, all doors in the property must meet at least the technical standard; that is a performance rule, not a requirement to replace or grant-fund every door.
Keep the five homeowner documents separate, because they have different jobs:
Separately, the contractor must retain its own evidence file (survey photos, dimensions, checklists and installation photographs) for 18 months; ask them to confirm they hold it. SEAI does not publish this whole set as a routine attachment list for every claim, so follow the instructions on your issued offer and forms. Rooms with replaced windows must also stay adequately ventilated, and open-flued appliances keep their permanent air supply.
Sources: SEAI Domestic Technical Standards and Specifications v4.0, clauses 6.24–6.25, pp. 140–147 · SEAI Contractor Code of Practice v1.19, section 5.6.6, pp. 37–38
None of these makes you a certifier; they are things you can see, or ask the contractor to show you, before the Declaration of Works is signed. Every windows and doors defect on SEAI's inspection checklist is graded at its most serious level, and each one requires rework:
Sources: SEAI Better Energy Homes QADP v5.14, windows checklist, p. 43 · QADP v5.14, doors checklist, p. 26
An offer covering both measures produces a Declaration of Works for the windows, a separate one for the doors, the post-works BER Declaration of Works and the Request for Payment, all submitted together. The contractor's nominated person signs each measure form after the work is complete and compliant, then you sign; the assessor signs only the BER form. SEAI publishes no blank for the current windows or doors forms, so go by the fields on your issued personalised pack. Where your payment route relies on "Good/Very Good" insulation grades or prior grant-aided insulation rather than the HLI, the contractor records that in the form's Comment box.
If any form is incomplete or missing, the payment request is rejected and all the documentation is returned. For what each form contains in full, see the Declaration of Works reference.
Sources: SEAI Contractor Code of Practice v1.19, sections 5.6.1–5.6.6, pp. 35–38 · SEAI Homeowner Application Guide, pp. 17–21
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