Deep Home Retrofit in Ireland
Upgrade your home to a warm, energy-efficient B2 BER rating. Compare the One-Stop-Shop vs individual upgrade paths, estimate project costs, and connect with registered installers.
The Deep Retrofit Journey: B2 BER Standard
A home energy retrofit is a comprehensive upgrade of a property's thermal envelope and heating systems. The ultimate goal of a deep retrofit is to bring an older, drafty property up to a high-performing **B2 Building Energy Rating (BER)** or better.
Retrofitting typical Irish homes involves combining multiple measures. Rafter insulation is completed, walls are insulated (either externally or internally), air tightness is improved, ventilation systems are upgraded, and fossil fuel boilers are replaced with modern air-to-water heat pumps.
Retrofit Loan Scheme
Irish homeowners can access low-interest green loans (Retrofit Loan Scheme) from participating banks, with rates as low as 3% to 4%. These loans are specifically designed to cover the net cost of home retrofits when working with registered contractors.
One-Stop-Shop vs. Individual Upgrades Path
Homeowners have two distinct pathways to complete a retrofit in Ireland.
One-Stop-Shop Path
A registered SEAI One-Stop-Shop provider acts as a single project manager. They assess your home, plan the energy upgrades, coordinate vetted tradespeople, and apply the grant value as an **upfront discount** on your final bill.
- ✓ Minimum target B2 BER rating
- ✓ Grants deducted upfront
- ✓ Single point of contact
- ✓ Less homeowner coordination needed
Individual Upgrades Path
Homeowners select and apply for individual grants (attic insulation, wall insulation, solar panels, etc.) separately. You manage and hire individual registered contractors and claim reimbursement after each work is finished.
- ✓ Upgrade steps completed over time
- ✓ Homeowner pays upfront, claims later
- ✓ Greater control over timeline and costs
- ✓ Manage separate installer quotes
Typical Deep Retrofit Costs & Grants (B2 Upgrade)
Bringing a pre-2011 home from a poor BER rating (e.g. E or F) to a B2 rating is a significant investment. Below are typical ranges showing average gross costs and stacked SEAI grants:
| House Type | Typical Upgrades Package | Average Gross Cost | Est. SEAI Grants | Net Cost to Homeowner |
|---|---|---|---|---|
| Mid-Terrace House | Attic, Dry Lining, Solar, Controls | €22,000 - €32,000 | €8,000 - €12,000 | €14,000 - €20,000 |
| Semi-Detached (3-Bed) | Attic, EWI, Heat Pump, Vent, Controls | €38,000 - €55,000 | €16,000 - €22,000 | €22,000 - €33,000 |
| Detached House | Attic, EWI, Heat Pump, Solar, Vent | €55,000 - €85,000+ | €24,000 - €34,000 | €31,000 - €51,000 |
Find Vetted Retrofit Installers in Dublin
Connect with registered, verified local contractors in Dublin and nationwide:
Get Free Retrofit Estimates
We'll match you with 3-5 of our top-rated, vetted retrofit installers in your local area to prepare cost estimates.
What's included in your
Guidance Package:
We've consolidated everything you need to navigate the retrofit journey without the stress of searching multiple government portals.
Eligibility Checklist
Instantly verify if your home and property type qualify for the 2026 grant schemes.
Application Portal Access
Direct, secure links to the official SEAI Online Portal to start your claim today.
Official PDF Forms
Downloadable Homeowner Application forms for your records and offline planning.
Verified Installer Shortlist
A curated list of high-performing, SEAI-registered trade professionals in your county.
Maximisation Tips
Insider advice on how to stack multiple grants to reach the maximum €39,250 in savings.