Installers · Cork · SEAI registers read 25 Sep 2026
1,121 SEAI-registered contractors say they work in Cork
1,121 companies on SEAI’s registers say they work in Cork (read 25 September 2026). 189 are based in the county, 913 cover it from elsewhere and 19 are One Stop Shops from elsewhere. Firms often tick a whole province, so the count is regional. Registration is a fact about paperwork, not a review of their work.
A town terrace in High Street, Cork. Apartments built 1990–2004 are the commonest home sold or let in Cork.
Terrace houses in High Street, from Summerhill South, Cork · David Hawgood · CC BY-SA 2.0
1,121
Companies that say they work here
SEAI registers · read 25 Sep 2026
Published figure16th of 26 for companies
189
Based in Cork
The address on the register
Published figure2nd of 26 for firms based in the county
23
One Stop Shops that list it
SEAI One Stop Shop register
Published figure16th of 26 for One Stop Shops
277
Heat pump installers who say they work here
SEAI home energy register · read 25 Sep 2026
Published figure16th of 26 for heat pumps
Updated · registers read 25 Sep 2026 · How we know · Corrections
Where this sits · the grant steps
Every SEAI grant runs the same six steps. SEAI won't pay for work that starts before it approves.
- Assessa BER, or a home energy assessment
- Applyonline, before any work starts
- ApproveSEAI's offer lasts 8 months
- Worksby an SEAI-registered contractor
- Claimpost-works BER and forms
- Paid4–6 weeks after complete paperwork
- The idea behind itApply, approve, works and payment are different steps
- You are hereInstallers in Cork
- Next questionShould you manage it yourself or use a One Stop Shop?
Who says they work in Cork, by job
Based in Cork first, then firms that travel to it, then One Stop Shops, then by name. Not an order of merit. Published figure
Attic insulation installers in Cork
341 registered for attic insulation · 63 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Ability Contracting Ltd
- Aidan Mccarthy Construction Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- Apex Engineering
Know the jobs before you call a firm in Cork
See your grants, and what you’d pay.
About 10 seconds. See your numbers first, then get quotes if you want them.
Cavity wall insulation installers in Cork
86 registered for cavity wall insulation · 11 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- C & W Insulations
- Connolly Insulation
- IRD Duhallow
Internal wall insulation installers in Cork
321 registered for internal wall insulation · 62 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Ability Contracting Ltd
- Aidan Mccarthy Construction Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- Apex Engineering
External wall insulation installers in Cork
130 registered for external wall insulation · 22 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Ability Contracting Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- B & T External Insulation & Plastering Ltd
- C & W Insulations
Window and door installers in Cork
274 registered for windows and doors · 57 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- 2020 Window And Glazing Systems Ltd
- Adrian Cremin Window & Door Repairs
- Amber Glow Premium LTD
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
Heat pump installers in Cork
277 registered for heat pumps · 53 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Adrian Harrington Heating & Plumbing
- Alternative Heating & Cooling Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- Best Plumbing Solution
Solar panel installers in Cork
318 registered for solar panels · 17 based in Cork
Heating controls installers in Cork
267 registered for heating controls · 65 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Adrian Harrington Heating & Plumbing
- Alternative Heating & Cooling Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- Apex Engineering
Solar hot water installers in Cork
116 registered for solar hot water · 28 based in Cork
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopWebsite
- Envirobead Ltd.One Stop ShopWebsite
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopWebsite
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopWebsite
- Alternative Heating & Cooling Ltd
- Anthony Coughlan Heating & Plumbing TA C&S Construction Services
- Burconn
- CA Energy Ltd
How Cork compares with the other counties
Each job's count against the median county's. Published figure
277 heat pump installers say they work in Cork; the median county has 279
Cork is 16th of 26 for heat pumps and 16th for companies of every kind. 189 are based here, 2nd of 26.
Each bar is Cork's count for that job, on a scale to the county with the most; the tick is the median county. Many firms tick a whole province, so counts move in regional steps, and neighbouring counties often share a step. A count is choice, not capacity.
Sources: SEAI home energy, One Stop Shop and solar registers, read 25 Sep 2026
The numbers
| Job | Cork | Median county | Rank of 26 |
|---|---|---|---|
| Heat pumps | 277 | 279 | 16th |
| Attic insulation | 341 | 343 | 16th |
| Cavity wall insulation | 86 | 87 | 15th |
| Internal wall insulation | 321 | 323 | 16th |
| External wall insulation | 130 | 132 | 16th |
| Windows and doors | 274 | 276 | 16th |
| Solar panels | 318 | 319 | 14th |
| One Stop Shops | 23 | 24 | 16th |
Before you sign
Four things SEAI tells homeowners to do.
- Wait for your grant approval email before any work starts. SEAI does not pay for work that began before it was approved.
- Get at least three quotes, and check each one covers the same job. The cheapest quote is often the one that leaves something out.
- Check the company is on the register on the day you sign. Companies join and leave it, and this page is a copy taken on one day.
- Get it in writing: what is being done, what it costs, when it starts and when it is finished.
Listed on SEAI’s public registers on 25 September 2026. Being registered is not an endorsement by SEAI or by us. Check the current register on seai.ie before you sign anything. Not affiliated with SEAI. On this list? Get homeowner plans to quote for
See your grants and what you’d pay
Four questions about your home, then your numbers. Get quotes from registered contractors if you want them.
Updated · registers read 25 Sep 2026 · How we know · Corrections