You manage it
The individual grants route, in order:
- Find a registered contractor and get quotes
- Apply to SEAI for a grant offer
- Get the work done
- Arrange a post-works BER
- Submit the evidence
SEAI pays the grant to you afterwards, and may inspect.
External wall insulation in Dublin
External wall insulation wraps the outside of the house in insulation and a new render finish. SEAI pays €8,000 for a detached home, €6,000 semi-detached or end of terrace, €3,500 mid-terrace and €3,000 for an apartment. Every external wall has to be done, and partial jobs don't qualify.
It is the measure that suits Dublin’s solid-wall houses, where there is no cavity to fill. It is also the one that occasionally runs into planning, so the sequence below matters.
- Free, and no obligation
- SEAI-registered contractors only
- Grant figures checked 15 August 2026
What SEAI pays, by house type
The grant is a fixed amount, not a percentage. It does not rise with the size of the house or the price of the quote, which means the bigger the job, the smaller a share of it the grant covers.
A detached house gets more than twice what a mid-terrace gets, and the reason is surface area rather than income: there is simply more wall to wrap. The house type is the first thing any contractor will ask.
Source: SEAI wall insulation grants. Amounts change. Confirm before you commit.
The grant, by house type
| Home | Grant |
|---|---|
| Detached house | €8,000 |
| Semi-detached or end of terrace | €6,000 |
| Mid-terrace house | €3,500 |
| Apartment | €3,000 |
Does your house qualify?
Four conditions, and the last one catches more people than the other three put together.
- Built and occupied before 31 December 2010. There's no upper age limit, so most of Dublin's stock is fine.
- The home needs its own MPRN, the meter number on your electricity bill.
- Every external wall gets insulated. SEAI calls this a whole-surface solution and partial jobs don't qualify. More on that below, because it's the rule that most often rules the measure out.
- Grant approval has to be in place before the work starts. SEAI states this plainly on its grants page. Start early and you have spent your own money.
It isn't only owner-occupiers
SEAI lists these as eligible applicant types too:
- Owner management companies
- Registered charities
- Holiday homes
- Approved Housing Bodies
- Non-private and commercial landlords of tenanted properties
How the money actually reaches you
SEAI runs three separate routes, and which one you're on changes who holds the money, who picks the work, and how long it takes.
A One Stop Shop manages it
They apply on your behalf and run the project, aiming at a minimum BER B rather than one measure. The grant is deducted from your price up front, so you never handle it, and you're buying a managed programme, not a wall.
Free upgrades
The Warmer Homes Scheme fully funds certain measures for households that meet the eligibility rules. The catch: an SEAI surveyor decides which measures your home gets, and an SEAI contractor installs them. You can't apply for external wall insulation specifically.
Routes and process from SEAI's home grants pages, checked 15 August 2026.
What the job actually involves
Insulation boards are fixed to the outside of every external wall, then covered with a reinforced base coat and a new render or finish.
The house ends up 100mm or so thicker on the outside. That is why the detailing around windows, sills, eaves and the roofline is most of the skill in the job.
Four things that follow from that, before the quotes arrive:
- Your rooms stay the same size. This is the main reason to choose it over internal dry lining, which takes roughly 60 to 100mm off each external wall.
- Anything fixed to the outside may need to move: meter box, cables, downpipes, vents, satellite dish. Moving the electricity connection is an ESB Networks service alteration, arranged separately from the insulation, and SEAI notes that fees may apply.
- The house looks different afterwards. On a red-brick terrace that is the whole objection, and it is why internal insulation still gets specified in conservation areas.
- A post-works BER assessment is required before SEAI pays anything.
Where this sits against the others
The grant is a fixed amount rather than a percentage, and this is the dearest measure on the list, so it is the one the grant reaches least of. Still the most effective thing you can do to a solid wall — just rarely the thing to do first.
What the wrap does to the wall
Solid wall
Pre-1945 stock, mostly
Nothing to inject.
External insulation
Rooms keep their size
Wrapped, then rendered.
Internal dry lining
Rooms lose 60–100mm
Boarded inside.
What it actually costs
| Home | Median cost | Grant | You pay | Grant covers |
|---|---|---|---|---|
| Detached house | €26,500 | €8,000 | €18,500 | 30% |
| Semi-detached or end of terrace | €23,219 | €6,000 | €17,219 | 26% |
| Mid-terrace house | €14,000 | €3,500 | €10,500 | 25% |
| Apartment * | €11,300 | €3,000 | €8,300 | 27% |
* SEAI notes this figure is based on five completed homes for January-June 2026. Costs from SEAI's published median costs, checked 15 August 2026. SEAI calculates them from the figures registered contractors and One Stop Shops submit when a grant is paid, so they are what people actually paid rather than what anyone advertises.
Quotes vary widely around that midpoint. Wall area, access, scaffolding, the finish you pick and how much detailing the house needs all move the number.
Two contractors can quote very differently for the same house. Use the median to sanity-check a quote, not to predict one.
Two things that stop the grant
The whole-surface rule
SEAI will not part-fund a partial job. Every external wall has to be insulated for the grant to apply.
On a mid-terrace where the owner wants to keep an original brick frontage, that usually takes external insulation off the table, and internal dry lining becomes the grant-eligible route instead.
Planning permission, which is a Dublin-shaped problem
Cavity and internal insulation need no planning permission. External wall insulation is the one measure where the question is real, because the wrap changes the outside face of the building.
Permission generally comes into it where the house is either:
- a protected structure, or
- inside an Architectural Conservation Area.
Dublin has an unusual amount of both, and there is a cruel overlap. The Victorian and Edwardian red-brick terraces through Rathmines, Ranelagh, Phibsborough and Drumcondra are exactly the solid-walled houses that most need external insulation — and exactly the ones most likely to be constrained from having it on the front.
Four authorities cover the county, so check with the right one before you commit to anything. Ask specifically about your address rather than your area, because conservation boundaries run down the middle of streets.
Where the front is constrained, the usual answer is internal dry lining. SEAI itself names it as the option "when you don't have a cavity wall and external insulation is not possible (for protected structures)".
It needs no permission. It costs you a little room width, and it is disruptive in a way the external job is not — rooms cleared, skirting boards and sockets off, dust everywhere.
SEAI lists planning permission and an ESB Networks service alteration as the two things external wall insulation "may require". See its guide to insulation upgrades, checked 15 August 2026.
The 25% building regulations threshold
If the work alters more than a quarter of the home’s surface area — which a full external wrap generally does — extra building regulations apply.
The home must then either reach a B2 BER, or already have a heating system and attic insulation that meet the regulation standard.
In practice this is why external wall insulation is so often quoted alongside attic insulation. The attic work is cheap, and it is frequently what gets the house over the line.
Who to ask about planning
Four authorities cover County Dublin. Yours depends on the address, not the postal district.
- Dublin City Council
- Dún Laoghaire-Rathdown County Council
- Fingal County Council
- South Dublin County Council
The question to ask is whether your specific address is a protected structure or sits inside an Architectural Conservation Area. Both answers are on file and neither costs anything to check.
No cost, no obligation
Get quotes for external wall insulation
Tell us about the house. We pass it to SEAI-registered contractors working in Dublin, and they come back to you with quotes. We're not a contractor and we never charge homeowners.
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External wall insulation questions
8 questions
What are the downsides of external wall insulation?
It's the most disruptive of the wall measures and the most visible. The house gets about 100mm thicker on the outside, which changes how it looks. On a red-brick terrace that alone rules it out for a lot of people. Anything fixed to the outer wall may have to move, including the electricity meter. It can need planning permission where internal insulation would not. And because SEAI requires every external wall to be done, you can't stage it a wall at a time to spread the cost. The upside it keeps: your rooms stay the same size, which internal dry lining can't offer.
Who is entitled to free external wall insulation?
Nobody can apply for free external wall insulation directly. SEAI's Warmer Homes Scheme fully funds certain measures for households meeting its eligibility rules, but an SEAI surveyor decides which measures your home gets and an SEAI contractor installs them. So free upgrades are real, and external wall insulation may or may not be among the ones chosen for your house. Everyone else is on the grant routes, where you pay the balance.
How much is the external wall insulation grant in Dublin?
SEAI pays a fixed amount by house type: €8,000 detached, €6,000 semi-detached or end of terrace, €3,500 mid-terrace and €3,000 for an apartment. The amount doesn't change with the size of the job. Set against SEAI's published median costs, that works out at roughly a quarter to a third of what the job actually runs to.
Do I need planning permission for external wall insulation?
Often not, but it is the one insulation measure where the question is real, because the wrap changes the external appearance of the building. Permission is generally needed where the house is a protected structure or sits in an Architectural Conservation Area, and much of inner Dublin does. Ask your local authority before you sign anything.
Can I insulate only the back and gable walls?
Not with a grant. SEAI requires a whole-surface solution, meaning every external wall insulated. This is the rule that most often catches people out on a terrace where the front is red brick they want to keep.
Will it take space off my rooms?
No. External wall insulation goes on the outside, so your internal dimensions are untouched. That is its main advantage over internal dry lining, which takes roughly 60 to 100mm off each external wall.
Why does the meter box have to move?
The wrap adds thickness to the wall, so anything fixed to the outside may need to come forward: the electricity meter, cables, downpipes, vents. Moving the electricity connection is an ESB Networks service alteration and it is arranged separately from the insulation work. Ask about it when you get quotes.
I already have cavity wall insulation. Can I still get this grant?
Yes. SEAI now allows a second wall insulation measure: if you previously received a cavity wall grant you can apply for external wall insulation. If you previously received an external wall grant, you cannot apply again. If the cavity fill is wet or slumped it usually has to come out first. See cavity wall insulation removal.