Grants offered are provided by the Government of Ireland through the Sustainable Energy Authority of Ireland (SEAI)
Your Complete Pathway to a Warmer, Greener, More Efficient Home
If you’re ready to transform your home with a full deep retrofit, the SEAI One Stop Shop (OSS) grant offers the highest level of funding available – up to €75,000 towards your upgrades. Retrofit Design is your end-to-end partner, managing the entire process so you can enjoy all the benefits without the stress.
What Is the SEAI OSS Grant?
Grants offered are provided by the Government of Ireland through the Sustainable Energy Authority of Ireland (SEAI)
The OSS grant is designed for whole-home deep retrofits, improving energy efficiency, comfort, and running costs while achieving a B2 BER rating or better. Unlike other grants, it supports multiple upgrade measures at once, making it the most comprehensive option for homeowners.
You’re eligible if:
- Your home was built and occupied before 2011
- Your current Building Energy Rating (BER) is B3 or lower
- Your retrofit aims to reach at least B2 BER with a 100 kWh/m²/year energy use improvement
- You haven’t previously received grants for the same upgrades
- You have your MPRN number ready (on your electricity bill)
- You complete a valid Home Energy Assessment (HEA) before applying
Already have your HEA? Great, you’re one step ahead!
What’s Covered by the OSS Grant?
With the OSS grant, you can combine a range of energy upgrades in one project:
- Wall insulation (internal, external, or cavity)
- Attic and floor insulation
- Windows and door upgrades
- Heat pump systems
- Solar PV installation
- Mechanical ventilation and airtightness improvements
- Heating controls and more
How Much Funding Is Available?
- Grants are cumulative, so you can claim support for multiple measures in one retrofit project.
- Typical funding can reach up to €75,000, depending on the scale of the works.
- You also gain access to low-cost green loans through participating lenders once your Home Energy Assessment (HEA) is complete.
Why Choose Retrofit Design as Your OSS Partner?
We’re a registered SEAI One Stop Shop provider, which means we handle everything from start to finish:
- Home Energy Assessment (HEA)
- Full project management – no need to juggle multiple contractors
- Grant application and compliance – we ensure you secure the maximum available funding
- Quality-certified contractors delivering to SEAI standards
- Clear timelines, communication and pricing every step of the way
How to Get Started
1. Book Your Home Energy Assessment (HEA)
A Home Energy Assessment is the foundation of your retrofit project. It’s a detailed survey that:
- Measures your current BER
- Creates a customised retrofit roadmap
- Checks your grant eligibility
- Recommends upgrades
- Estimates costs and savings
You need a valid HEA to apply for most SEAI grants and access green loans.
2. Already Have Your HEA? Complete the SEAI Grant Eligibility Form
If you’ve already completed a Home Energy Assessment, the next step is to confirm your eligibility for SEAI grants.
Note: If your HEA was carried out by Retrofit Design, you can skip this step – our team will guide you through the entire grant application process from start to finish.
3. Need More Funding? Access Low-Cost Green Loans
In addition to SEAI grants, you could qualify for low-cost green loans or retrofit finance through banks and credit unions. These loans are designed to make your home energy upgrades even more affordable.
We’ll help you:
- Understand the best finance options available
- Ensure your project meets the eligibility criteria
- Access competitive rates and maximise your funding
Can OSS Be Combined With Other Grants?
Yes – in some cases, you can access more than one grant to maximise your funding. For example:
- If your home is vacant or derelict, you may first claim the Vacant Property Refurbishment Scheme to make it habitable.
- You can then apply for the OSS grant to carry out deep energy upgrades and reach a B2 BER or higher.
- Alternatively, you might start with individual BEH grant measures and later move to a full OSS retrofit.
We’ll guide you through the best sequence for your situation, so you don’t miss out on any available funding.
SEAI One Stop Shop Grants - Funding Breakdown
Upgrade to a more energy-efficient, cost-effective, and comfortable home with Retrofit Design. As a trusted SEAI One Stop Shop provider, we manage every step of your retrofit journey – from initial enquiry and grant applications to energy assessments and contractor coordination. Enjoy lower energy bills, increased property value, and the peace of mind that comes with expert project management. Enquire online today and start your journey towards a sustainable, energy-smart home!
Detached house
Attic Insulation
€1,500
Rafter Insulation
€3,000
Cavity Wall Insulation
€1,700
Internal Insulation (Dry Lining)
€4,500
External Wall Insulation (The Wrap)
€8,000
Windows (Complete Upgrade)
€4,000
External Doors (max. 2)
€800 per door
Heat Pump Systems
€6,500
Central Heating System for Heat Pump
€2,000
Heat Pump Air to Air
€3,500
Heating Controls
€700
Heat Pump bonus
€2,000
Solar Hot Water
€1200
Floor Insulation
€3,500
Solar PV
|
€800 per kWp up to 2kWp €250 for every additional kWp up to 4kWp Total Solar PV grant capped at €2100 |
€1600 for 2kWp solar panels €1850 for 3kWp solar panels €2100 for 4kWp solar panels |
Mechanical Ventilation
€1,500
Air Tightness
€1,000
Home Energy Assessment
€350
Project Management
€2,000
Semi-Detached or End of Terrace
Attic Insulation
€1,300
Rafter Insulation
€3,000
Cavity Wall Insulation
€1,200
Internal Insulation (Dry Lining)
€3,500
External Wall Insulation (The Wrap)
€6,000
Windows (Complete Upgrade)
€3,000
External Doors (max. 2)
€800 per door
Heat Pump Systems
€6,500
Central Heating System for Heat Pump
€2,000
Heat Pump Air to Air
€3,500
Heating Controls
€700
Heat Pump bonus
€2,000
Solar Hot Water
€1200
Floor Insulation
€3,500
Solar PV
|
€800 per kWp up to 2kWp €250 for every additional kWp up to 4kWp Total Solar PV grant capped at €2100 |
€1600 for 2kWp solar panels €1850 for 3kWp solar panels €2100 for 4kWp solar panels |
Mechanical Ventilation
€1,500
Air Tightness
€1,000
Home Energy Assessment
€350
Project Management
€1,600
Mid-Terrace
Attic Insulation
€1,200
Rafter Insulation
€3,000
Cavity Wall Insulation
€800
Internal Insulation (Dry Lining)
€2,00
External Wall Insulation (The Wrap)
€3,500
Windows (Complete Upgrade)
€1,800
External Doors (max. 2)
€800 per door
Heat Pump Systems
€6,500
Central Heating System for Heat Pump
€2,000
Heat Pump Air to Air
€3,500
Heating Controls
€700
Heat Pump bonus
€2,000
Solar Hot Water
€1200
Floor Insulation
€3,500
Solar PV
|
€800 per kWp up to 2kWp €250 for every additional kWp up to 4kWp Total Solar PV grant capped at €2100 |
€1600 for 2kWp solar panels €1850 for 3kWp solar panels €2100 for 4kWp solar panels |
Mechanical Ventilation
€1,500
Air Tightness
€1,000
Home Energy Assessment
€350
Project Management
€1,200
Apartment (any)
Attic Insulation
€800
Rafter Insulation
€1,500
Cavity Wall Insulation
€700
Internal Insulation (Dry Lining)
€1,500
External Wall Insulation (The Wrap)
€3,000
Windows (Complete Upgrade)
€1500
External Doors (max. 2)
€800 per door
Heat Pump Systems
€4,500
Central Heating System for Heat Pump
€1,000
Heat Pump Air to Air
€3,500
Heating Controls
€700
Heat Pump bonus
€2,000
Solar Hot Water
€1200
Floor Insulation
€3,500
Solar PV
|
€800 per kWp up to 2kWp €250 for every additional kWp up to 4kWp Total Solar PV grant capped at €2100 |
€1600 for 2kWp solar panels €1850 for 3kWp solar panels €2100 for 4kWp solar panels |
Mechanical Ventilation
€1,500
Air Tightness
€1,000
Home Energy Assessment
€350
Project Management
€800
One Stop Shop Benefits
OSS Project Management
Retrofit Design will project manage the full OSS process for the homeowner from the initial stage of your enquiry, through to arranging the home energy assessment, the installation, multiple contractors, and leaving the homeowner to focus on the benefits.
SEAI Grants
Homeowners can avail of the substantial grants available through SEAI to cover a proportion of the cost of the energy upgrade. Grant funding will ensure our customer maximises the funds available. – See Grant Table below for funding available to the homeowner.
Lower Energy Bills
Homeowners can enjoy lower energy bills because they have, for example, invested in better insulation, new windows and doors, and efficient heating systems. Homeowners enjoy savings of hundreds each year on heating and electricity.
Enhanced Property Value
Homes with a higher Building Energy Rating (BER) are more appealing to buyers and they often command a higher market value. An OSS upgrade ca be recognised as an investment into the homes overall value.
What our Customers Say
Ann, Co. Laois
