Do I have to use one of these companies to get the grant?

Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.

How many quotes should I get in Mayo?

Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.

Is this list in any order of merit?

No. Companies based in Mayo come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Heat pump installers in Mayo

239 companies on the SEAI register are based in or serve Mayo for heat pumps (register as of 8 September 2026).

An air-to-water heat pump unit standing on a plinth against a rendered gable wall. — Wärmepumpe Außeneinheit (air-to-water heat pump outdoor unit) · Mueller felix · CC BY-SA 4.0 · Photo credits

Based in Mayo

38 of them. Sorted by what they are registered for, then by name — this is not an order of merit.

Churchfield Home ServicesOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and door
Nationwide · SEAI no. 10253 · Website
Based in Mayo.
Airsol Renewable Solutions Ltd
Heat pumpSolar hot waterSolar panel
Based in Mayo · serves Connacht · SEAI no. 17903
Based in Mayo.
Castlelough Corporation Ltd
Attic insulationHeat pumpHeating controlsInternal wall insulation
Based in Mayo · serves Connacht · SEAI no. 16977
Based in Mayo.
Cathal Cawley Plumbing And Heating
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 14499
Based in Mayo.
Culmore Heating & Plumbing Ltd
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 17868
Based in Mayo.
Declan Gallagher Heating & Plumbing
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 18130
Based in Mayo.
Derek Corcoran Heating & Plumbing
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 13798
Based in Mayo.
Dika Home Maintenance
Heat pump
Based in Mayo · serves Connacht · SEAI no. 20168
Based in Mayo.
DMC mechanical construction ltd
Attic insulationHeat pumpHeating controlsInternal wall insulation
Based in Mayo · serves Connacht · SEAI no. 16715
Based in Mayo.
EDH Construction & Maintenance
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 16801
Based in Mayo.
Ferguson Heating & Plumbing
Heat pump
Based in Mayo · serves Connacht · SEAI no. 19393
Based in Mayo.
FFS Motor & Trading Services Ltd
Heat pump
Based in Mayo · serves Dublin and Connacht · SEAI no. 18036
Based in Mayo.
G. Traynor & Sons Ltd
Heat pumpHeating controlsSolar hot water
Based in Mayo · serves Connacht · SEAI no. 11170
Based in Mayo.
Gerry Mchale Plumbing & Construction Contractors
Attic insulationHeat pumpHeating controlsInternal wall insulationSolar hot water
Based in Mayo · serves Connacht · SEAI no. 11937
Based in Mayo.
Glenn Judge Heating & Plumbing Ltd
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 10952
Based in Mayo.
Green Joule Heating & Plumbing
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 14913
Based in Mayo.
Heat Pump Troubleshooters Ltd
Heat pump
Nationwide · SEAI no. 17504
Based in Mayo.
Homergy Ltd T/AComfort Solutions Retrofit
Attic insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Based in Mayo · serves Connacht · SEAI no. 13882
Based in Mayo.
James Donnelly Eco Heating Ltd
Heat pumpHeating controlsSolar hot water
Nationwide · SEAI no. 13989
Based in Mayo.
James Heneghan Electrical Plumbing And Heating
Attic insulationHeat pumpHeating controlsInternal wall insulationSolar hot water
Based in Mayo · serves Connacht · SEAI no. 13100
Based in Mayo.
Joe Gavin Ltd
Attic insulationHeat pumpHeating controlsInternal wall insulationSolar hot water
Based in Mayo · serves Connacht · SEAI no. 11267
Based in Mayo.
John G Flannery Heating & Plumbing
Heat pump
Based in Mayo · serves Connacht · SEAI no. 17352
Based in Mayo.
Joseph Sheridan
Heat pumpHeating controlsSolar hot water
Based in Mayo · serves Connacht · SEAI no. 18062
Based in Mayo.
Kd Mechanical Engineers Ltd. Trading As Kd Group
Heat pump
Based in Mayo · serves Munster and Connacht · SEAI no. 19962
Based in Mayo.
Kevin Durkin Heating And Plumbing Services
Heat pumpHeating controlsSolar hot water
Based in Mayo · serves Connacht · SEAI no. 12819
Based in Mayo.
Kieran Doyle
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 15631
Based in Mayo.
Ksg Heating & Plumbing Limited
Heat pump
Based in Mayo · serves Connacht · SEAI no. 20178
Based in Mayo.
Liam Reddington Heating And Plumbing
Heat pump
Based in Mayo · serves Connacht · SEAI no. 19342
Based in Mayo.
McHugh Heating & Plumbing Ltd
Heat pumpHeating controlsSolar hot water
Based in Mayo · serves Connacht · SEAI no. 16003
Based in Mayo.
McManamon Mechanical Services Ltd
Heat pumpHeating controlsSolar hot water
Based in Mayo · serves Dublin, Leinster, Munster and Connacht · SEAI no. 11345
Based in Mayo.
P.J. McHale
Heat pumpHeating controlsInternal wall insulation
Based in Mayo · serves Connacht · SEAI no. 10105
Based in Mayo.
Patrick Gallagher Heating & Plumbing Ltd
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 12868
Based in Mayo.
Peter Garrivan Plumbing
Heat pump
Based in Mayo · serves Connacht · SEAI no. 20112
Based in Mayo.
Peter McCann T/A Sean McCann & Son
Heat pump
Based in Mayo · serves Connacht · SEAI no. 11974
Based in Mayo.
Rend Master Ltd
Attic insulationExternal wall insulationHeat pumpInternal wall insulationSolar panelWindow and door
Nationwide · SEAI no. 17925
Based in Mayo.
Steven Walsh Heating & Plumbing
Heat pumpHeating controls
Based in Mayo · serves Connacht · SEAI no. 16599
Based in Mayo.
Stf Renewable Limited
Heat pump
Nationwide · SEAI no. 19349
Based in Mayo.
Walsh Heating & Cooling Ltd
Heat pump
Based in Mayo · serves Dublin, Leinster, Munster and Connacht · SEAI no. 17325
Based in Mayo.

Also cover Mayo from elsewhere (201)

These told SEAI they cover the province Mayo is in, or listed it among the counties they serve. Ask how far they travel before you go any further. Names only here; each one's full register row is on its own county page. OSS = One Stop Shop.

Ashgrove Engineering Ltd T/A Ashgrove Renewables (OSS) · Bayview Contracts Ltd (OSS) · Bord Gais Energy Ltd (OSS) · Breffni Insulation Ltd (OSS) · Cooper Insulation Ltd. (OSS) · Electric Ireland Superhomes (OSS) · Energyfix (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Moston Construction Ltd (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · Adrian Doorley Plumbing & Heating · Aidan Murray Heating & Plumbing Ltd · Air Flow Air Refrigeration Galway Ltd T/A Airflow · Alex Byrne · Allbrite Heatpump Specialists Ltd · Alternative Energy Ireland AEI · Alternative Heating & Cooling Ltd · AMS Plumbing & Heating Specialists Ltd · Anthony Brady Plumbing Limited · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Anthony Egan Heating And Plumbing · Anthony Kilcolm · Ap Renewables Ltd · Atlantic Heating And Cooling · Ballyhogan Plumbing Services Ltd · Base Engineering Ltd · Bayside Heating Ltd · Blackstrand Retrofit Ltd. · Breandan Lynch Construction Services · Brian Scally Plumbing Services · Brian Smith Heating & Plumbing Ltd · Bromur Energy Ltd · Brusna Energy Solutions Ltd · Caimin Dooley Heating & Plumbing · Cathal Hughes Heating & Plumbing · Clever Energy Solutions Ltd · Climate Control Renewables Limited · Cloverhill Renewables Ltd · Colin Lynskey Plumbing And Heating · Colmur Heating + Plumbing Ltd · Cork Gas Electrical Services · Cowan Heating and Plumbing LTD · Craft Heating & Plumbing Services · Craughwell Heating Ltd T/A Natural Green Energy · CTI Teo T/A Gallagher Heating Systems · D.P.H Plumbing Ltd · Daigon Ltd · Damian Grehan Plumbing & Heating · Daria Ltd T/A Ej Fidgeon · David Coleman Renewables Ltd. T/A DC Renewables · DMT Renewables Ltd · Duignan Plumbing Ltd · DW Plumbing & Heating · Dylshan Enterprises Limited · Eco Cool Refrigeration Ltd · Eco Energy Systems · Eco Pro Plumbing LTD · Ecoflex Energy Ltd · Ecoscene · Ecotech Contracts IRI Ltd · Ed O Halloran Heating & Plumbing Ltd · Efficient Renewables Ltd · Eitas · Energy Superstore Ltd · Energywise Savings Ireland Ltd · Enviro - Therm Ltd · Eoin Hanniffy Trades 365 Ltd · Eoin McQuinn Heating & Plumbing · Eurotech Renewables Ltd · Feakle Gas & Plumbing Ltd · Feeney Heat and Gas Ltd · Ferm Eng Ltd · Finlay EcoFit Tullamore Ltd · Finn Heat Pumps Limited · Finvarra Ltd · Fitzpatrick Plumbing & Heating Contractors Ltd · Fmc Plumbing & Construction Ltd · FND Heating Ltd · Forsah Energy Limited · Frank Roche Air Conditioning Ltd T/A Frank Roche · Free-Flo Heating + Gas Services Ltd · Gaffney Mechanical · Galway Plumbing Solutions · Gilroy's Green Energy Ltd · GL Plumbing & Heating · Glenhill Plumbing Services · Green Air Technologies Ltd · Green Home Plumbing LTD · Greentherm Ltd. · Heatgen Installations Limited · Home Building Solutions T/A HBS Elegant build Ltd · Hooban Heating & Plumbing · Horan Plumbing Ltd · HS Plumbing & Heating · Ian Connolly Plumbing · J & D O'Brien Ltd · J O Donnell Plumbing & Heating · James Kane Energy Solutions LTD · James Lynch Plumbing & Heating Ltd · James O Connor Plumbing & Heating · James Sweeney · Jason Fahy Heating · JF Heating Ventilation LTD TA Western Heat Pump · JJS Plumbing & Heating Limited · Joe Dunican Plumbing And Heating Ltd · Joe Hegarty Plumbing Ltd · John Hession Heating & Plumbing · John Neary Heating And Plumbing Ltd · Joseph Kenny Heating & Plumbing Ltd · Joseph Madden Heating and Plumbing Ltd · KG Plumbing & Heating Ltd · Khiggins Electrical Ltd · Kilian McGowan Heating & Plumbing · Killco Renewables Ltd · Kilroe Heating and Renewables Ltd · Knockglass Renewables Ltd · Kolkacool Ltd · Kor Plumbing & Heating · Lakeview Heating & Plumbing Ltd · Larkfield Plumbing Contractors Ltd · Laurence Walsh Heating & Plumbing · Leitrim Warmer Homes CLG · Liss Mechanical Services LTD · Low Cost Plumbing & Gas · LVP Renewables Ltd · Lynch Ecoenergy Engineering Ltd · M.K. O'Neill Plumbing & Heating Ltd · MacAire Mechanical Services Ltd · Mark Dunne Plumbing & Heating · Mark Molloy · Marron Activ 8 Energies Ltd · Martin Fahy Heating & Plumbing Ltd · Mc Cormack Plumbing & Construction Ltd · Mc Elligott Heating & Plumbing Limited · MC Heat Pumps & Ventilation · McCaffrey Mechanical Services Ltd. · McElligotts Limited T/A EZ Heat · Metro Utilities Ltd T/A Metro Developments · MFG Construction Ltd · Michael Quigley Plumbing & Heating Services · Michael Walsh Plumbing And Heating · Miguel Moreau Plumbing · Mike Kelly Plumbing & Heating Limited · Mulvany Electrical Contracting Ltd T/A East Coast · N.Cunningham Mechanical Services Ltd · Niall Muldoon · Noel Drummond Heating & Plumbing Ltd · Noonan Refrigeration Systems Ltd Ta Revolution Energy · Northern Refrigeration Services Ltd · Nutherm Galway Ltd · Nutherm Renewables (Ireland) Ltd · NZEB Technologies Ltd · O Brien Bros Plumbing & Heating Ltd · Ollie Nally Heating & Plumbing · Patrick Gallagher Heating & Plumbing · Patrick O'Brien Plumbing and Heating · Paul Feely Plumbing & Heating · Paul Folan Plumbing & Heating Contractor · PC Plumbing And Heating Ltd · Penrose Electrical Ltd · PMCG Services · Premier Heating Consultants Ltd. · Proservice Technicians Ltd · R O'Donnell Plumbing Ltd · Raymond Mullarkey Plumbing & Heating · Rb Heating And Plumbing Ltd · Robbie Mcgovern Ltd. · Rory Quigley Heating & Plumbing · Roscommon Heating & Plumbing Ltd · Royal Renewables Ltd · RTS Heating & Cooling Services LTD · Sa Plumbing And Heating Ltd · Sean Gallagher Plumbing + Heating Ltd · Sean Paul Construction Ltd · Solaregy T/A Sola · Solaris Green Energy · Stephen Mc Guinness Plumbing Ltd Smg Mechanical · Stephen Treacy Heating and Plumbing Ltd · Sterio Renewables · Taaffe Plumbing and Heating Limited · TAF Plumbing Ltd · Terence Mc Donagh · Thermax Ltd · Thomas Walsh Mechanical Services Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Treaty Renewables Limited · Troy Heating And Plumbing Ltd · Verde Remediation Services Ltd · VKG Trading Ltd · Walshs Heating Plumbing And Renewables Ltd · White Premier Construction Ltd · Whitemoor Plumbing Ltd · Zetta Home Services Ltd

What it costs, and what the grant pays

The grant for a semi-detached house is €6,500. SEAI recorded a middle price of €16,832 for this work last year, which leaves about €10,332 for you to pay. These are national figures, not Mayo ones — SEAI does not publish prices by county.

What it costs on a home like yours, and what you are left paying

Before you sign

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.

How the application works

Ask up to five of them

Fill in one form, tick who you want to hear from, and we pass your details to those companies and nobody else. It costs nothing and you are under no obligation.

Get heat pumps quotes in Mayo

Common questions

Do I have to use one of these companies to get the grant?: Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.
How many quotes should I get in Mayo?: Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.
Is this list in any order of merit?: No. Companies based in Mayo come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Other work in Mayo

Listed on SEAI’s public registers on 8 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.