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 Cork?

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 Cork 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.

Window and door installers in Cork

271 companies on the SEAI register are based in or serve Cork for windows and doors (register as of 8 September 2026).

A fitter seen from behind lifting a new window into an opening during a renovation. — Unrecognizable workman installing window in house during renovation process · Ksenia Chernaya · Pexels License · Photo credits

Based in Cork

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

Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and door
Nationwide · SEAI no. 12010 · Website
Based in Cork.
Envirobead Ltd.One Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Nationwide · SEAI no. 10218 · Website
Based in Cork.
Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Based in Cork · serves Dublin and Munster · SEAI no. 10496 · Website
Based in Cork.
Munster External Wall Insulation T/A SE SystemsOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and door
Based in Cork · serves Dublin and Munster · SEAI no. 14825 · Website
Based in Cork.
2020 Window And Glazing Systems Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19612
Based in Cork.
Adrian Cremin Window & Door Repairs
Window and door
Based in Cork · serves Munster · SEAI no. 19807
Based in Cork.
Amber Glow Premium LTD
Window and door
Based in Cork · serves Munster · SEAI no. 12609
Based in Cork.
Anthony Coughlan Heating & Plumbing TA C&S Construction Services
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Nationwide · SEAI no. 10791
Based in Cork.
Apex Engineering
Attic insulationHeating controlsInternal wall insulationWindow and door
Nationwide · SEAI no. 20106
Based in Cork.
Ardl Windows Ltd Trading As Senator Windows
Window and door
Based in Cork · serves Munster · SEAI no. 19896
Based in Cork.
Blarney Windows Systems Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19888
Based in Cork.
Bluelite Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19483
Based in Cork.
Brigvale Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 20140
Based in Cork.
Castle Aluminium
Window and door
Based in Cork · serves Munster · SEAI no. 19937
Based in Cork.
Classic Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19627
Based in Cork.
Clearspace Windows Limited
Window and door
Based in Cork · serves Munster · SEAI no. 19867
Based in Cork.
Clona Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19872
Based in Cork.
Connie Manning Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19489
Based in Cork.
Countrywide Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19482
Based in Cork.
Cremin Glass And Maintenance
Window and door
Based in Cork · serves Munster · SEAI no. 20060
Based in Cork.
D10 Windows And Doors
Window and door
Based in Cork · serves Munster · SEAI no. 19975
Based in Cork.
Deep Retrofit Ltd
Attic insulationInternal wall insulationWindow and door
Based in Cork · serves Munster · SEAI no. 18094
Based in Cork.
Desmond Conservatories Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19971
Based in Cork.
East Cork Windows & Door Limited
Window and door
Based in Cork · serves Munster · SEAI no. 19606
Based in Cork.
Ecoseal
Window and door
Based in Cork · serves Munster · SEAI no. 19848
Based in Cork.
Emerald Construction And Engineering Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 20125
Based in Cork.
Eoin McLoughlin
Window and door
Based in Cork · serves Munster · SEAI no. 20059
Based in Cork.
Gnb Windows Ltd Trading As Windowmasters
Window and door
Based in Cork · serves Munster · SEAI no. 19608
Based in Cork.
Halo Windows Manufacturing Ltd, Trading As Senator Windows
Window and door
Based in Cork · serves Munster · SEAI no. 19688
Based in Cork.
J.D. Buckley Construction Ltd
Attic insulationCavity wall insulationExternal wall insulationInternal wall insulationWindow and door
Based in Cork · serves Munster · SEAI no. 10095
Based in Cork.
John O'Leary Sales Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 11952
Based in Cork.
Kelong Glass Services
Window and door
Based in Cork · serves Munster · SEAI no. 19690
Based in Cork.
Kl Windows
Window and door
Based in Cork · serves Munster · SEAI no. 19933
Based in Cork.
Knockleigh Investments Holdings
Window and door
Based in Cork · serves Munster · SEAI no. 19779
Based in Cork.
L&N Joinery Ltd Trading As Premier Windows & Doors
Window and door
Based in Cork · serves Munster · SEAI no. 19598
Based in Cork.
Leamlara Quality Windows And Doors Limited
Window and door
Based in Cork · serves Munster · SEAI no. 19477
Based in Cork.
Marina Windows
Window and door
Based in Cork · serves Munster · SEAI no. 19551
Based in Cork.
Michael Harrington Upvc Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19833
Based in Cork.
Montroy Sales Ltd Trading As All Ireland Doors & Windows
Window and door
Nationwide · SEAI no. 20000
Based in Cork.
Munster Joinery (Ire) Unlimited Company
Window and door
Nationwide · SEAI no. 19650
Based in Cork.
O Leary Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19669
Based in Cork.
O'Doherty Aluminium & Upvc
Window and door
Based in Cork · serves Munster · SEAI no. 19826
Based in Cork.
O'Donoghue Windows And Doors.
Window and door
Based in Cork · serves Munster · SEAI no. 19938
Based in Cork.
Ob Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19738
Based in Cork.
Pat Enright Glass And Glazing Ltd
Internal wall insulationWindow and door
Based in Cork · serves Munster · SEAI no. 19801
Based in Cork.
Porchways Irl Ltd, Sky Windows
Window and door
Based in Cork · serves Munster · SEAI no. 19716
Based in Cork.
Secure Energy Systems Limited T/A Energy Glazing
Window and door
Based in Cork · serves Dublin, Leinster and Munster · SEAI no. 19698
Based in Cork.
Sigma Homes Ltd
Attic insulationInternal wall insulationWindow and door
Based in Cork · serves Munster · SEAI no. 16181
Based in Cork.
Southern Home improvements T/a Southern windows and doors
Window and door
Based in Cork · serves Munster · SEAI no. 19622
Based in Cork.
Sova Contracting Ltd Ta Perfect Home Windows
Window and door
Based in Cork · serves Dublin, Leinster, Munster and Connacht · SEAI no. 19554
Based in Cork.
Structural Glazing Specialists Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19911
Based in Cork.
Trustedtouchinstallations.Com
Window and door
Based in Cork · serves Munster · SEAI no. 19881
Based in Cork.
Walsh U.Pvc Windows And Doors
Window and door
Based in Cork · serves Munster · SEAI no. 19855
Based in Cork.
Weathermaster Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19594
Based in Cork.
Wesco Windows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19624
Based in Cork.
West Windows & Doors
Window and door
Based in Cork · serves Munster · SEAI no. 19655
Based in Cork.
Window Warehouse C & C Limited
Window and door
Based in Cork · serves Munster · SEAI no. 19810
Based in Cork.
Winwindows Ltd
Window and door
Based in Cork · serves Munster · SEAI no. 19707
Based in Cork.

Also cover Cork from elsewhere (213)

These told SEAI they cover the province Cork 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.

Bayview Contracts Ltd (OSS) · Bord Gais Energy Ltd (OSS) · Breffni Insulation Ltd (OSS) · CBM Munster Construction T/A Home Energy Retrofits (OSS) · Churchfield Home Services (OSS) · Electric Ireland Superhomes (OSS) · Energlaze Home Energy Upgrades (OSS) · Energywise Ireland (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Leetherm Project Management Ltd (OSS) · Moston Construction Ltd (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · Advantage Energy Systems Ltd · AGI Construction Ltd · AJ Windows & Doors Services · Ak Window Systems Ltd · Allied Irish Property Ltd · Aluminium A Rated Windows And Doors Ltd · Aocwindows · Aru Joinery Ltd · Atlas Windows And Doors Repairs · Balco Windows Limited · Barefield Fabrications Ltd Ennis Aluminium · Bc Top Contractors Limited Ta Bct Contractors · Boland Windows · Bonmahon Joinery Ltd · Bright Vista Group Ltd. · Budget Renovations · C&H Building Contractors Limited · Carlson & Co Ltd · City & Country Windows · CK Energy Management Solutions (EMS) Ltd t/a ENCON · Clifford Roofing And Contracting Ltd · Comway Ltd Trading As Home Improvements Ireland · Cozy Windows Limited · Crescent Windows And Doors · Cresthaven Ltd · Cubo Rooflights Limited · D And J Glazing · Damien Walsh Building & Plumbing Contractor Ltd. · Darren Knox Building Services Ltd · Dave Cunningham Carpentry Ltd · Declan Buggy LTD · Deerpark Windows Gateway Ltd · Deise Windows · Dillons Joinery & Engineering · Dovista Irl Ltd · Dublin Home Repair Limited · Dungarvan UPVC & Westgate Windows Limited · Dunshaughlin Business Park · Dunurtaigh Construction Ltd · E-Scape Windows And Doors Systems · Eco Tech Windows Ltd · Eco Window Concepts Limited · Ecosuir Ltd T/A Senator Windows · Edgaras Ziauberis Pom Door Range · Eitas · Energy Retrofit Ireland · Energy Saving Technologies Ltd T/A Energlaze · Fine Fenestration Limited Ta Woodmarq · Finestra Ltd. · Fit And Refit · Flanagan Aluminium & Upvc · Fogarty Workshop Ltd · Foley Windows & Doors Ltd · Frames Direct Uc · Garry O'Malley Windows · Gathergrove Trading Ltd Ta John Ruth And Sons · Geraghty Joinery · Gerard Moroney Carpentry And Construction · Glazing Spares And Repairs Ltd · Gm Conservatories Ltd · GOC Windows And Doors Limited · Goode Energy · Gp Renovation · Granagh Windows And Doors · Greenpark Windows Ltd · Harris Windows · Harris Windows And Doors Ltd · Harstaf Vinduer Ltd · Hickey Aluminium · High Prospects Limited · Home Building Solutions T/A HBS Elegant build Ltd · Inframe Windows And Doors Ltd · Interlux Ireland Limited · J O'Mahony Windows And Doors Services Limited · Jason Bracken Windows Ltd · JB Window Door & Repairs Ltd · Jimmy Maher & Co. Ltd · JJS Plumbing & Heating Limited · Jmc Windows & Doors Ltd · Joe Mac Services · Joe O Carroll Windows Ltd (Ta Senator Windows) · Joe Roche Glass & Glazing Ltd · John Greaney Building Contractor · John Spillane Glazing Ltd. · John Taylor Construction Ltd · Jsa Windows And Doors · Just Joinery Ltd Ta Divine Ireland Windows & Doors · K&D Developments (Sligo) Ltd. · K&K Windows Ltd · Kb Windows And Doors · Kcb Windows And Doors · Killarney Glass · Killeen Composite Doors Limited · Kingdom Window Systems · KWRS Ltd Kells Traditional Timber Windows & Doors · Larry Farrell Upvc · Leetherm Insulation Ltd. · Limerick Glass & Glazing Ltd · Limerick Glasstech Ltd · Limerick Repairs · Logik Window Systems Ltd · Lucan Windows And Doors · M&L Repairs Windows Doors · Maher Aluminium Ltd Ta Maher Windows · Maher Window & Doors Ltd · Mahon Windows Limited · Martin Windows Limited · Martompol · Mchale Windows Ltd · Metro Insulation Ltd · Mhs Upvc Ltd · Michael Considine · Michael Dillon Upvc Limited · Michael Dunne Glazing · Michael Fitzgerald Trading Windows And Doors · Midwest Windows Ltd · Mike Doors & Windows · Modern Home Solutions · Modern Style Home · Munster Premier Doors · Munster Window Services And Repairs · Murphy Larkin Timber Products · New Doors And Floors Limited · New Generation Doors Ltd · Newcastle West Glass · Norbec Limited · Nordan Vinduer Ireland Ltd · Norlux Windows · O'Connell Windows Ltd. Ta Senator Windows Limerick · O'Sheas Windows And Doors Limited · Pandg Callaghan Trading As Timeless Sash Windows Ltd · Pannoncelt Ltd · Pat Ryan Windows Ltd · Patrick Hough · Peter Allen Windows And Doors · Physalia Ltd Ta Ecoaer · PK Windows · Pouldoon Construction Ltd · Premier Insulations · Premium Glazing Systems Ltd · Prestige Windows And Doors · Pro Fit Pro Fix · Pw Windows Ltd · Rend Master Ltd · Renual Construction Limited · Retrofit Energy Ireland One Stop Shop Ltd · Revolution Doors & Windows Limited · Rio Ents Ltd ta A-Rate · Roscommon Windows Ltd · Ryan Spray Foam · Ryans Windows & Doors Ltd · Sean Barron Limited Ta Sean Barron Windows And Doo · Sean Doyle Windows Ltd · Sean Maher · Senator Windows Ltd · Seven Hills Windows & Doors · Shelldon Farm Enterprises Limited Ta Senator Windo · Silver Insight Limited T/A Quality Composite Doors · SM Windows & Doors Ltd · SNW Construction Limited · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Doors · Superior Trade Frames · Sustainable Warmth Ltd · Swiftwell Ltd Ta The Window Company · T.S.Windows & Doors · Teroco Windows And Doors Limited · The Period Door Company Ltd · The Window Doctor Ltd · Thomas Cosgrave Ta Cosgrave Enterprise · Timoney Windows & Conservatories Ltd · Tipperary Windows & Home Improvements Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Tmg Specialist Installations · Tom Murphy Windows · Tommy Allen · Tommy Meehan Windows & Doors · Tony Quigley Windows Ltd · Triple Glazed Windows And Doors · Tynan Design Manufacuring Ltd · Uab Termo Langai · Ucs Design Group Ireland Ltd · Velux Co Ltd · Vincenttullyconstructionltd.T/A Tully Windows and doors · Walsh Windows · Warmcore Homes Ltd · Warmer Solutions · Weathermaster Kerry Ltd · Weglarz Construction · Wildwood Windows (Wildwood Building And Landscaping) · William Flynn Windows & Door Ltd · Windows Direct

What it costs, and what the grant pays

The grant for a semi-detached house is €3,000. SEAI recorded a middle price of €9,085 for this work last year, which leaves about €6,085 for you to pay. These are national figures, not Cork ones — SEAI does not publish prices by county.

This job has no SEAI median price; the cost above is an estimate.

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 windows and doors quotes in Cork

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 Cork?: 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 Cork 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 Cork

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.