Guide for homeowners · Funding
Insulation grants in Northern Ireland: the 2026 guide
By Conor Hamilton, Building & Renovation Contributor · 9 minute read
Published 4 July 2026 · Last reviewed 5 July 2026
Grant schemes in NI change often. This guide is general information only, not advice: it reflects our team’s reading of the official sources linked below as at the review date above. Always confirm the current position with the NI Housing Executive, nidirect or the Department for Communities before you apply or spend money.
Edited by Mark Crawford, Digital Content Editor.
Insulation is the most commonly funded home improvement in Northern Ireland, because it is the cheapest way to cut bills in an oil-heavy housing stock. In mid-2026 two routes are worth your time: NISEP, which is open now, and the Affordable Warmth Scheme, which remains the main government route until the new £150 million Warm Healthy Homes Fund opens, expected from April 2027. This guide covers who qualifies, what each route funds, and how to apply without losing the grant.
Which insulation grants are open in NI right now?
The honest answer, as of July 2026, is that the landscape is mid-transition, and the table below reflects that. Do not rely on an older article that says the Affordable Warmth Scheme is simply open or simply closed: it is being replaced, but its successor has not opened yet.
| Route | What it covers | Who it is for | Status (July 2026) |
|---|
| NISEP (NI Sustainable Energy Programme) | Loft and cavity wall insulation, some heating measures, via approved scheme managers. | Owner-occupiers and tenants; priority (fully funded) places are means-tested, some part-funded places for others. | Open. Annual funding, first-come each scheme year, so apply early. |
| Affordable Warmth Scheme | Insulation, heating and related energy measures for the least efficient homes. | Low-income owner-occupiers and some private renters (gross household income threshold; disability benefits not counted). | Open, and still the main government route in mid-2026. Run by the NI Housing Executive and due to run until March 2028 while the Warm Healthy Homes Fund takes over. Confirm current openings with NIHE. |
| Warm Healthy Homes Fund | Whole-house, fabric-first energy upgrades: insulation first, then heating. | Low-income households; final criteria under consultation until 19 August 2026. | Not open yet. Expected from April 2027 as the successor to Affordable Warmth, with around £150m planned over its first five years. |
| Energy supplier and council schemes | Periodic local insulation offers, often NISEP-funded and rebadged. | Varies by scheme and area. | Check what is running in your council area before paying full price. |
Sources: NI Housing Executive grants pages; nidirect getting help with home improvement costs; Department for Communities Warm Healthy Homes Fund (consultation open to 19 August 2026, fund expected from April 2027); NISEP scheme guidance. A July 2026 snapshot: confirm the live position before applying.
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Grants by measure: loft, cavity and solid wall
- Loft insulation grants. The quickest, cheapest win, and the measure most commonly funded through NISEP. Fully funded for qualifying lower-income households, part-funded places on some schemes for everyone else. Even unfunded, a loft top-up is typically a few hundred pounds and pays back fast in an oil-heated home.
- Cavity wall insulation grants. Funded through the same NISEP and Affordable Warmth routes where the walls are suitable. A surveyor confirms suitability first; unsuitable or poorly filled cavities cause damp problems, which is one more reason to stay inside an approved scheme.
- Solid wall insulation grants (internal or external). The dearest measure, so support is targeted at the hardest-to-heat homes. Affordable Warmth has carried a higher cap for solid-wall measures, and the incoming Warm Healthy Homes Fund takes a fabric-first, whole-house approach that is built for exactly these properties.
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Is there a window replacement grant in NI?
Not as a standalone scheme, and any article promising a dedicated NI window grant is overselling it. Replacement windows and doors can, however, be funded as part of a wider package under the means-tested energy schemes where new glazing improves a hard-to-heat home, and the whole-house approach of the incoming Warm Healthy Homes Fund points the same way. If you do not qualify, the job is still worth pricing properly: our windows, doors and double glazing cost guide shows fair NI prices per unit and whole-house for 2026.
Who qualifies for an insulation grant in NI?
Almost all of it is means-tested, on one of two triggers: a gross household income threshold, or receipt of a qualifying benefit. Affordable Warmth has used a gross income line and does not count disability-related benefits (PIP, DLA, Attendance Allowance, Carers Allowance) as income, which brings more households inside the line than people expect. NISEP priority places work similarly. If your income is above the thresholds you may still get a part-funded NISEP place, and the measure is often worth doing at full price anyway.
How to apply, and how people lose the grant
- Check what is open today at the NI Housing Executive grants pages or nidirect. Scheme names are changing through 2026 and 2027.
- Confirm your eligibility against that specific scheme’s current criteria.
- Apply and wait for written approval. Do not start work first: paying an installer to begin before approval is the most common way people forfeit funding.
- Use the scheme’s approved installer, or a registered tradesperson who can certify the work to the scheme standard.
The full picture across every NI grant, including heating, repairs and adaptations, is in our NI home improvement and energy grants guide. If it is the Warm Home or Affordable Warmth scheme names you were searching for, our Warm Homes Scheme NI guide explains exactly what replaced what, and what to do this year.
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Why insulation matters more in NI than anywhere else in the UK
Around two thirds of NI homes heat with oil, the highest share in the UK, so heat loss costs NI households more per degree than it costs anyone else. That is why insulation is always the first measure the schemes fund, before boilers or heating controls. If your boiler is also due, read our oil boiler replacement cost guide before committing, because insulating first can let you fit a smaller, cheaper boiler.
What to do next
Four steps before you sign anything.
1
Check what is open now on the NIHE or nidirect pages linked above.
2
Check your income or benefit eligibility for that specific route.
3
Get written approval before any work starts, never pay a trade to begin early.
4
Not eligible? Post the job free below and vetted NI installers will quote.
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About this guide. NI Trades is a tradesperson directory, not a government body or an advice service, and nothing on this page is financial, legal or benefits advice. The scheme details above reflect our understanding of publicly available government information at the review date shown; schemes, criteria and dates change, sometimes at short notice, and we may not catch every change immediately. Treat this page as a starting point, do your own research, and rely on the official sources (NI Housing Executive, nidirect, Department for Communities) for any application decision.
Frequently asked questions
What insulation grants are available in Northern Ireland in 2026?
Two routes matter in 2026. NISEP, the NI Sustainable Energy Programme, funds loft and cavity wall insulation through approved scheme managers and is open now, with fully funded places for lower-income households. The NIHE-run Affordable Warmth Scheme remains the main government route for insulation and heating in the least energy-efficient homes until its replacement arrives. Its successor, the £150 million Warm Healthy Homes Fund, is under public consultation until 19 August 2026 and is expected from April 2027. Scheme status changes often, so confirm what is open with the NI Housing Executive or nidirect before you apply.
Who qualifies for a house insulation grant in NI?
Most NI insulation funding is means-tested, either on gross household income or on receipt of a qualifying benefit. The Affordable Warmth Scheme has used a gross household income threshold and helpfully does not count disability-related benefits such as PIP, DLA, Attendance Allowance and Carers Allowance as income. NISEP schemes reserve their fully funded priority places for lower-income and vulnerable households, with some part-funded places for everyone else. Exact thresholds vary by scheme and scheme year, so always check the current criteria for the specific route you are applying to.
Can I get a grant for solid wall insulation in NI?
Solid wall insulation, internal or external, is the most expensive common measure, so grant support is more limited and targeted at the hardest-to-heat homes. Affordable Warmth has supported solid-wall measures at a higher cap than standard measures, and the incoming Warm Healthy Homes Fund takes a fabric-first, whole-house approach that is expected to prioritise exactly this kind of work in the least efficient properties. If your home has solid walls, get your application in through the current open route and confirm the position before commissioning anything privately.
Are there window replacement grants in NI?
There is no standalone window replacement grant in Northern Ireland. However, replacement windows and doors can be funded as part of a wider energy-efficiency package under the means-tested schemes, where new glazing is judged to improve the efficiency of a hard-to-heat home, and the whole-house approach of the incoming Warm Healthy Homes Fund makes that more likely, not less. If you do not qualify, focus on getting the price right instead: our windows and doors cost guide shows what a fair NI price looks like in 2026.
How do I apply for an insulation grant in Northern Ireland?
Start at the NI Housing Executive grants pages or nidirect and confirm which scheme is currently open, because names and routes are changing through 2026 and 2027. Check your eligibility against that specific scheme, apply, and wait for written approval before any work starts. Paying an installer to begin early is the most common way people forfeit a grant. Grant-funded insulation must be installed to the scheme standard, usually by an approved or registered installer, so the choice of tradesperson is part of the process, not an afterthought.
Is loft insulation worth it without a grant in NI?
Usually yes. Topping up loft insulation is one of the cheapest energy improvements there is, typically a few hundred pounds for a standard NI semi, and it pays back quickly in an oil-heated home. Cavity wall insulation is similarly cost-effective where the walls are suitable. If you do not qualify for funded work, get two or three written quotes for the measure alone; it is a fast, low-disruption job for a competent installer.
About the author
Conor HamiltonBuilding & Renovation Contributor · Newtownards, Northern Ireland
Conor writes the NI building and renovation cost benchmark guides for NI Trades. He draws on a civil-engineering background and on quotes from working FMB, OFTEC and NICEIC tradespeople across Northern Ireland to keep the price ranges realistic. He holds a BEng (Hons) in Civil Engineering from Queen’s University Belfast.
BEng (Hons) Civil Engineering, Queen’s University Belfast