Deep Retrofit Ireland: One Stop Shop
RetrofitIreland.ie provides whole-house deep retrofits across Ireland through SEAI One Stop Shop registered providers. One provider manages your full project, with grants deducted upfront and combined support typically €25,000–€30,000.
Get Your Free Quote →What Deep Retrofit and One Stop Shop Involve
A deep retrofit is a whole-house energy upgrade that combines multiple measures, typically insulation, heating, and sometimes windows or solar, carried out together to move a home to a significantly better Building Energy Rating, usually B2 or better.
The One Stop Shop is the SEAI-backed delivery model for this: a single registered provider manages the entire project under one contract, applies for all applicable grants on the homeowner’s behalf, and deducts the grant amount upfront from the bill rather than the homeowner claiming it back after payment.
This is different from RetrofitIreland.ie’s individual service pages. There, a homeowner selects one or two upgrades and deals directly with a specialist contractor for each. This page is for homeowners who want several measures carried out together by a single managed provider.
Typical Project Cost and Grant Support
A whole-house deep retrofit typically costs €50,000 to €75,000 before grants, depending on home size, condition, and the specific measures required.
| Scenario | Combined Grant |
|---|---|
| Heat pump package alone (unit + heating upgrade + renewable heat bonus) | Up to €12,500 |
| Heat pump package + solar | Up to €14,300 |
| Full whole-house deep retrofit via OSS | Typically €25,000–€30,000 |
For larger projects, typically €40,000 or more, the OSS route is usually more generous than stacking individual Better Energy Homes grants, because OSS-specific insulation rates can exceed the standard individual rates.
The OSS Premium
Using an OSS provider typically costs 15 to 30 percent more than self-managing the same measures individually. On a €40,000 retrofit, this is roughly €6,000 to €12,000 extra. This premium covers project management, coordination across trades, and the convenience of a single point of contact and a single bill.
Any Combination of These Six Services
A deep retrofit can include some or all of RetrofitIreland.ie’s core services, managed together under one provider.
One Stop Shop or Individual Grants?
Both routes are legitimate. The right one depends on project size and how much control you want.
Choose One Stop Shop If
- The project is large, typically €40,000 or more
- Multiple measures are needed for a meaningful result
- A single contract and single bill matters more than the 15–30% premium
- You want the grant deducted upfront, not claimed back later
Choose Individual Grants If
- Only one or two specific upgrades are needed
- Budget is more limited or work can be paced over time
- Choosing your own contractor for each trade matters to you
- You’re comfortable claiming the grant back after payment
How Deep Retrofit Works Through RetrofitIreland.ie
SEAI-registered One Stop Shop providers manage BER assessment, contractors, and grant applications.
Select Full Deep Retrofit
Or select three or more individual measures on the quote form. Either routes to OSS providers.
Receive OSS Provider Contact
RetrofitIreland.ie sends the enquiry to SEAI-registered One Stop Shop providers in the area.
Initial BER Assessment
Establishes the home’s starting point and identifies the measures needed to reach B2.
Technical Design and Quote
A retrofit plan covering the specific measures required, with grant amounts itemised and deducted from the total.
Contractor Coordination and Works
The OSS provider manages the trades required as subcontractors. Timeline varies, typically several weeks for a full retrofit.
Post-Works BER and Certification
Confirms the home has reached B2 or better. The provider handles all paperwork; you’ve already paid only the net cost.
Risks, Exclusions, and Limitations
No Choice of Subcontractors
The OSS provider assigns their own registered subcontractors for each trade. A homeowner wanting to choose a specific insulation or heating contractor should use the individual measures route instead.
The 15–30% premium is real. This is a genuine added cost in exchange for single-contract convenience; it is not the cheapest way to complete the same works.
Eligibility Conditions
The home must have been built and occupied before 2011. The property should generally have a BER of B3 or lower before works begin, though this requirement is being relaxed from March 2026. The completed project must achieve B2 or better.
Cannot Double-Claim
A home that has already received SEAI grants for a specific measure generally cannot claim again for the same measure under OSS.
Longer Project Timeline
A whole-house scope with multiple trades takes materially longer than a single measure, and living in the home during works may involve more disruption.
Deep Retrofit Questions
Get Your Free Deep Retrofit Quote
Get a free deep retrofit quote from SEAI One Stop Shop registered providers near you. Select Full Deep Retrofit, or three or more individual measures, and a provider in your area will contact you directly with a home assessment and full project quote.
SEAI One Stop Shop Providers Across Ireland
RetrofitIreland.ie covers all 26 counties. Select your county below to see providers in your area.
Carlow
Carlow Town, Muinebheag, Tullow, Hacketstown, Borris, Bagenalstown, Rathvilly
Cavan
Cavan Town, Bailieborough, Belturbet, Virginia, Cootehill, Kilnaleck, Kingscourt
Clare
Ennis, Shannon, Kilrush, Killaloe, Ennistymon, Lisdoonvarna, Miltown Malbay, Scarriff, Sixmilebridge
Cork
Cork City, Ballincollig, Carrigaline, Midleton, Mallow, Cobh, Fermoy, Clonakilty, Bantry, Kinsale, Youghal, Bandon, Skibbereen, Macroom, Mitchelstown
Donegal
Letterkenny, Donegal Town, Bundoran, Buncrana, Ballyshannon, Ballybofey, Dungloe, Killybegs, Glenties, Carndonagh
Dublin
Swords, Lucan, Blanchardstown, Tallaght, Clondalkin, Malahide, Finglas, Ballymun, Coolock, Howth, Balbriggan, Dundrum, Rathfarnham, Dun Laoghaire
Galway
Galway City, Tuam, Ballinasloe, Loughrea, Athenry, Gort, Clifden, Oranmore, Moycullen, Headford
Kerry
Tralee, Killarney, Listowel, Kenmare, Dingle, Cahersiveen, Killorglin, Castleisland, Ballybunion
Kildare
Naas, Newbridge, Kildare Town, Celbridge, Leixlip, Maynooth, Athy, Clane, Kilcullen, Monasterevin, Rathangan, Castledermot
Kilkenny
Kilkenny City, Thomastown, Callan, Castlecomer, Graiguenamanagh, Urlingford
Laois
Portlaoise, Mountmellick, Mountrath, Abbeyleix, Rathdowney, Stradbally, Portarlington
Leitrim
Carrick-on-Shannon, Manorhamilton, Drumshanbo, Mohill, Ballinamore
Limerick
Limerick City, Castletroy, Newcastle West, Rathkeale, Abbeyfeale, Kilmallock, Adare, Askeaton
Longford
Longford Town, Granard, Edgeworthstown, Ballymahon, Lanesborough
Louth
Dundalk, Ardee, Carlingford, Termonfeckin, Blackrock, Dunleer, Tallanstown
Mayo
Castlebar, Ballina, Westport, Claremorris, Ballinrobe, Swinford, Belmullet, Kiltimagh, Charlestown
Meath
Navan, Drogheda, Ashbourne, Trim, Dunshaughlin, Ratoath, Laytown, Kells, Enfield, Oldcastle, Slane, Dunboyne
Monaghan
Monaghan Town, Carrickmacross, Castleblayney, Clones, Ballybay
Offaly
Tullamore, Birr, Edenderry, Clara, Portarlington, Banagher, Ferbane
Roscommon
Roscommon Town, Boyle, Castlerea, Strokestown, Ballaghaderreen, Elphin, Athlone
Sligo
Sligo Town, Ballymote, Tubbercurry, Enniscrone, Collooney
Tipperary
Clonmel, Thurles, Nenagh, Tipperary Town, Carrick-on-Suir, Roscrea, Cahir, Cashel, Templemore, Borrisokane
Waterford
Waterford City, Tramore, Dungarvan, Lismore, Portlaw, Kilmacthomas, Cappoquin, Tallow
Westmeath
Mullingar, Athlone, Moate, Kilbeggan, Kinnegad, Delvin, Castlepollard
Wexford
Wexford Town, Gorey, New Ross, Enniscorthy, Bunclody, Rosslare, Ferns, Courtown, Kilmore Quay, Taghmon
Wicklow
Bray, Greystones, Wicklow Town, Arklow, Blessington, Enniskerry, Baltinglass, Kilmacanogue
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