Cork City
16.2% of homes built before 1945, 57 conservation areas. Sunday's Well, Shandon and around.
Insulation grants in Cork County
Cork County is older than Cork City, which surprises most people who live in it. 18.8% of its homes predate 1945 against the city’s 16.2%, and 16,388 of them predate 1919 — stone farmhouses and town-centre buildings rather than city terraces. At the same time its single largest group of homes, 35,163 of them, went up between 2001 and 2010.
That is a barbell: very old and very new, with an unusually thin middle. It means the right measure here depends far more on the individual house than it does anywhere in Dublin.
- Free, and no obligation
- SEAI-registered contractors only
- Grant figures checked 15 August 2026
What Cork County is built from
Only 9.6% of the county’s homes date from 1946 to 1970 — the decades that fill out the middle of Dublin’s housing profile. Cork County largely skipped them and built instead through the 1990s and 2000s.
The 35,163 homes from 2001 to 2010 are cavity-walled, built to a building regulation that already required insulation, and are usually candidates for a cavity top-up and attic work rather than anything structural.
The 16,388 pre-1919 homes are the opposite problem and a genuinely different one from a Dublin terrace. Solid stone or rubble walls, often with lime mortar, where a conventional impermeable insulation can trap moisture that the wall previously breathed out. That is a survey question before it is a grant question.
The census records when a home was built, not what its walls are made of. Age is a good proxy; the actual test is a borescope through one drilled hole.
When Cork County was built
| Built | Homes | Share |
|---|---|---|
| Pre 1919 | 16,388 | 12.8% |
| 1919 - 1945 | 7,597 | 6.0% |
| 1946 - 1960 | 6,461 | 5.1% |
| 1961 - 1970 | 5,716 | 4.5% |
| 1971 - 1980 | 13,920 | 10.9% |
| 1981 - 1990 | 10,905 | 8.5% |
| 1991 - 2000 | 17,799 | 14.0% |
| 2001 - 2010 * | 35,163 | 27.6% |
| 2011 - 2015 | 4,303 | 3.4% |
| 2016 or later | 6,580 | 5.2% |
* the largest single group. Percentages are of 127,590 households, and exclude the small number the census records as "not stated".
Planning permission, and why the answer is local
Only external wall insulation raises this, and only where a home is a protected structure or sits inside an Architectural Conservation Area. Each local authority designates its own in its own development plan, and the two County Cork authorities have drawn them very differently.
Cork County Council lists 50 conservation areas in the Cork County Development Plan 2022–2028. They cover whole town centres rather than individual streets, averaging six times the size of a Cork City designation.
Cork County designates conservation at the scale of whole town centres, which is a different proposition from a named terrace.
Ask about your specific address. These boundaries run down the middle of streets and two neighbours can get different answers.
Conservation areas in Cork County
50 listed by Cork County Council in the Cork County Development Plan 2022–2028
Among them, the largest of the 50; Castlemartyr and Castlebernard are the two biggest by area:
- Kinsale
- Youghal
- Clonakilty
- Cobh
- Midleton
- Mallow
- Fermoy
- Skibbereen
The full list and the maps are published by the council. Start at Cork County Council.
Which measure, and what it leaves you to pay
The county’s 50 conservation areas cover 39.59 square kilometres between them — an average of 0.79 km2 each, against 0.12 km2 in the city. These are not streets, they are towns: Kinsale, Youghal, Clonakilty, Cobh, Midleton, Mallow, Fermoy and Skibbereen among them.
So if you live centrally in a historic Cork town, the likelihood that external wall insulation is a planning question is much higher than the raw count of areas suggests. Ask the council before you sign anything.
Outside the town centres, and on the boom-era estates in particular, none of that applies and the usual cavity-and-attic route is open.
Grant amounts are national and do not vary by address. Read from seai.ie, checked 15 August 2026.
What applies in Cork County
- External wall insulation
- €17,219
- Internal wall insulation
- €6,343
- Cavity wall insulation
- €285
- Attic insulation
- €601
What a semi-detached home pays after the grant, at SEAI's median installed cost. A county of two housing stocks, so both the solid-wall pair and the cavity pair are common. Which set applies depends on whether the house went up before the war or during the boom.
The other County Cork authority
No cost, no obligation
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Cork County insulation questions
5 questions
Do I need planning permission for external wall insulation in Cork County?
Cork County designates conservation at the scale of whole town centres, which is a different proposition from a named terrace. Cork County Council lists 50 conservation areas in the Cork County Development Plan 2022–2028, covering whole town centres rather than individual streets, averaging six times the size of a Cork City designation. Ask about your specific address rather than your area.
Which insulation measure suits homes in Cork County?
The county’s 50 conservation areas cover 39.59 square kilometres between them — an average of 0.79 km2 each, against 0.12 km2 in the city. These are not streets, they are towns: Kinsale, Youghal, Clonakilty, Cobh, Midleton, Mallow, Fermoy and Skibbereen among them. The largest single group of homes here, 27.6% of the total, was built in 2001 - 2010. A borescope through one drilled hole settles what your own wall is.
Is my Cork County home old enough to qualify?
SEAI requires the home built and occupied before 31 December 2010, with its own MPRN. 89.3% of homes in Cork County clear that — 113,949 of 127,590 households. The 8.5% built since do not, and they went up to a considerably better standard to begin with.
What was Cork County mostly built in?
2001 - 2010, which accounts for 27.6% of its housing and is the single largest group. Only 9.6% of the county’s homes date from 1946 to 1970 — the decades that fill out the middle of Dublin’s housing profile. Cork County largely skipped them and built instead through the 1990s and 2000s.
Does the grant change depending on where I live?
No. SEAI sets amounts by measure and dwelling type, not by address — €6,000 on a semi-detached external wall job anywhere in the country. What changes locally is which measure your house can take. So if you live centrally in a historic Cork town, the likelihood that external wall insulation is a planning question is much higher than the raw count of areas suggests. Ask the council before you sign anything.