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 Monaghan?

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 Monaghan 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 Monaghan

137 companies on the SEAI register are based in or serve Monaghan 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 Monaghan

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

OHK Energy LTDOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and door
Nationwide · SEAI no. 11118 · Website
Based in Monaghan.
Brenglaze Window Systems L T D
Window and door
Based in Monaghan · serves Dublin, Leinster and Ulster · SEAI no. 19781
Based in Monaghan.
Flanagan Upvc
Window and door
Based in Monaghan · serves Dublin and Ulster · SEAI no. 19827
Based in Monaghan.
Inniskeen UPVC & Aluminium Ltd
Window and door
Based in Monaghan · serves Dublin, Connacht and Ulster · SEAI no. 20133
Based in Monaghan.
Mallon Windows & Doors
Window and door
Based in Monaghan · serves Ulster · SEAI no. 19711
Based in Monaghan.
Mcgorman Pvc Windows And Doors Ltd
Window and door
Based in Monaghan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 19717
Based in Monaghan.
Padraic Costello Upvc Windows & Door
Window and door
Based in Monaghan · serves Dublin, Leinster and Ulster · SEAI no. 19844
Based in Monaghan.
T&Aglass
Window and door
Based in Monaghan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 19596
Based in Monaghan.
WindowKerr
Window and door
Based in Monaghan · serves Ulster · SEAI no. 19968
Based in Monaghan.

Also cover Monaghan from elsewhere (128)

These told SEAI they cover the province Monaghan 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.

Activ8 Energies (OSS) · Ashgrove Engineering Ltd T/A Ashgrove Renewables (OSS) · Bayview Contracts Ltd (OSS) · Bord Gais Energy Ltd (OSS) · Breffni Insulation Ltd (OSS) · Churchfield Home Services (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) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · AGI Construction Ltd · Aiden Mcguinness & Son Ltd · Allied Irish Property Ltd · Anchor Windows · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Apex Engineering · Aru Joinery Ltd · B. Donaghey & Sons · Bc Top Contractors Limited Ta Bct Contractors · Bluebuild Renewables Ltd · Brendan Sammon Aughnasheelin Ltd · Bridge Crest Ltd T/A Senator Windows · Brownes Upvc · C.G. Windows Ltd · Carlson & Co Ltd · Carrabine Joinery Ltd · Castle Windows · Cavan Glass By Design · Cmg Windows · Coastal Windows & Doors · Cozy Windows Limited · Cubo Rooflights Limited · Darragh & Gregory Timoney Windows Ltd · Dovista Irl Ltd · Dublin Home Repair Limited · Dungarvan UPVC & Westgate Windows Limited · Dunshaughlin Business Park · Eitas · Energy Saving Technologies Ltd T/A Energlaze · Eoin Kelly And Sons · Errigal Windows & Glazing · Fine Fenestration Limited Ta Woodmarq · Frames Direct Uc · Franmac · G. Kilpatrick Windows Ltd · Galbraith Construction Ltd · Gavin McGonagle Windows · Geraghty Joinery · Gill Windows · Gortahork Windows · Gp Renovation · Grogan And Currid Ltd · Halpin Aluminium & Upvc Ltd · Harstaf Vinduer Ltd · High Prospects Limited · Home Building Solutions T/A HBS Elegant build Ltd · Inframe Windows And Doors Ltd · Interlux Ireland Limited · JJR Insulation Ltd · Jmc Windows & Doors Ltd · Joe Mcdaid Ltd · Joe Rowley Windows Ltd · Jsa Windows And Doors · Lawronna Limited · Lucan Windows And Doors · Lynch Windows Cavan · Lynch Windows Ltd · M&L Repairs Windows Doors · Malone Windows Limited · Martin Conservatories · Martin Windows Limited · Mc Menamin Building Contractors Ltd · McNamee Window Systems Ltd · Metro Insulation Ltd · Mike Doors & Windows · Mk Living Designs Ltd · Modern Home Solutions · Modern Solutions Trade Windows & Doors · Modern Style Home · Montroy Sales Ltd Trading As All Ireland Doors & Windows · Muinin Contracts Ltd Trading As Senator Windows · Munster Joinery (Ire) Unlimited Company · New Doors And Floors Limited · New Generation Doors Ltd · Nordan Vinduer Ireland Ltd · Norlux Windows · O'Rourke Windows & Glass Ltd · Pandg Callaghan Trading As Timeless Sash Windows Ltd · Pannoncelt Ltd · Pat Kelly & Sons · Pauric Neely · Perfect Fit Modular Ltd Ta Perfect Fit Windows & D · Physalia Ltd Ta Ecoaer · Pml Windows And Doors · Premier Insulations · Premier Solutions NW Ltd · Prestige Windows And Doors · Rb Glazing · Rend Master Ltd · Retrofit Energy Ireland One Stop Shop Ltd · Revolution Doors & Windows Limited · Rio Ents Ltd ta A-Rate · Silver Insight Limited T/A Quality Composite Doors · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Sustainable Warmth Ltd · T Patton And Son Ltd · Teroco Windows And Doors Limited · The Professionals · Timoney Windows & Conservatories Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Tpd Windows · Triple Glazed Windows And Doors · Uab Termo Langai · Ucs Design Group Ireland Ltd · Velux Co Ltd · Vindr Vs Ltd · Weatherproof Windows And Doors Ltd · Wedlock Windows Ltd

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 Monaghan 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 Monaghan

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 Monaghan?: 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 Monaghan 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 Monaghan

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.