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Installers · SEAI registers · Read 25 Sep 2026

378 SEAI-registered heat pump installers say they work in Kildare and Wicklow. In Donegal, 138 do.

SEAI lists 2,624 companies on its registers for grant work (read 25 September 2026). Each one ticks the counties it covers, often a whole province, so these counts show who says they work there. Registration is a fact about paperwork. SEAI doesn’t endorse anyone’s work, and we don’t rank them.

A fitter seen from behind lifting a new window into an opening during a renovation.

A fitter lifting a new window into place during a renovation.

Unrecognizable workman installing window in house during renovation process · Ksenia Chernaya · Pexels License

Know the jobs before you call a firm

See your grants, what you’d pay, and how many registered firms work in your county.

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About 10 seconds. See your numbers first, then get quotes if you want them.

2,117

Home energy grant contractors

SEAI Home Energy Upgrade (Better Energy Homes) registered contractors · read 25 Sep 2026

Published figure

528

Solar panel companies

SEAI registered solar PV companies · read 8 Sep 2026

Published figure

32

One Stop Shops

SEAI registered One Stop Shops · read 8 Sep 2026

Published figure

478

Heat pump technical advisors

SEAI registered Technical Advisors · read 25 Sep 2026

Published figure

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.

  1. Assessa BER, or a home energy assessment
  2. Applyonline, before any work starts
  3. ApproveSEAI's offer lasts 8 months
  4. Worksby an SEAI-registered contractor
  5. Claimpost-works BER and forms
  6. Paid4–6 weeks after complete paperwork
  1. The idea behind itApply, approve, works and payment are different steps
  2. You are hereSEAI-registered installers
  3. Next questionShould you manage it yourself or use a One Stop Shop?

Choose your county

Alphabetical, never by count. Each county links to its register page, grouped by job. Published figure

Companies on SEAI's registers that say they work in each county
CountySay they work hereBased hereOne Stop ShopsHeat pump installers
Carlow1,4572128376
Cavan6874721140
Clare1,1135822277
Cork1,12118923277
Donegal67914518138
Dublin1,45543329354
Galway98014918236
Kerry1,0979020274
Kildare1,49010329378
Kilkenny1,4614228376
Laois1,4603528376
Leitrim9431218236
Limerick1,1348124278
Longford1,4372124373
Louth1,4405026375
Mayo9619619237
Meath1,47110426377
Monaghan6733520139
Offaly1,4616128376
Roscommon9593518236
Sligo9494618236
Tipperary1,1317625279
Waterford1,1235224278
Westmeath1,4555125376
Wexford1,4589328377
Wicklow1,4736528378

SEAI home energy, One Stop Shop and solar registers · read 25 Sep 2026

A company that works across a province is counted in every county of that province, because that is what it told SEAI. A count is choice, not capacity.

Who's on which register

The public registers we read, and how many businesses each lists. A register we couldn't read in full is dashed. Published figure

Figure 1Published figure

8,043 businesses on 11 public registers

SEAI’s grant register lists 2,117 home energy contractors. 3 registers we couldn’t read in full are drawn dashed.

  • SEAI home energy grant contractors2,117
  • SEAI One Stop Shops32
  • SEAI solar panel companies528
  • SEAI heat pump technical advisors478
  • NSAI cavity wall installers103
  • NSAI external wall installers210
  • NSAI airtightness testers105
  • NSAI ventilation validators66
  • RGII gas installers1,708
  • Safe Electric contractors3,405
  • OFTEC oil technicians144

Each bar counts the businesses one public register lists. One business can be on several registers, so the bars add up to more than 8,043. SEAI's three registers (grant work, One Stop Shops, solar panels) are the ones that matter for a grant; the others are trade registers we read for cross-checks. RGII gas installers, Safe Electric contractors and OFTEC oil technicians: we could not read these registers in full.

Sources: SEAI Home Energy Upgrade (Better Energy Homes) registered contractors, read 25 Sep 2026 · SEAI registered One Stop Shops, read 8 Sep 2026 · SEAI registered solar PV companies, read 8 Sep 2026 · SEAI registered Technical Advisors, read 25 Sep 2026 · NSAI Agrément registered cavity wall insulation installers, read 25 Sep 2026 · NSAI Agrément registered ETICS (external wall insulation) installation companies, read 25 Sep 2026 · NSAI certified air tightness testers, read 25 Sep 2026 · NSAI registered ventilation validators, read 25 Sep 2026 · RGII registered gas installers, read 25 Sep 2026 · Safe Electric Register of Electrical Contractors, read 25 Sep 2026 · OFTEC registered businesses, read 25 Sep 2026

What “SEAI-registered” means, and what it doesn’t

A fact about paperwork, then the four things SEAI tells you to do before you sign.

A company on this register has signed up to SEAI’s terms for grant work and can claim a grant on your behalf. If you want a grant, the work has to be done by one of them.

It does not mean SEAI has inspected their work, or that we have. There is no score, no star rating and no order of merit on this site: the lists are sorted by where a company is based and what it is registered for, and nothing else.

A company can ask to be taken off these pages at any time. Email us and it is done the same week, no reason needed. The register itself is SEAI’s; we only copy it.

  1. Wait for your grant approval email before any work starts. SEAI does not pay for work that began before it was approved.
  2. Get at least three quotes, and check each one covers the same job. The cheapest quote is often the one that leaves something out.
  3. 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.
  4. Get it in writing: what is being done, what it costs, when it starts and when it is finished.

How the application works →

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

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Updated · registers read 25 Sep 2026 · How we know · Corrections