If you’ve been considering a home energy upgrade, one of the biggest questions is simple: how much will it actually cost me? New data from Sustainable Energy Authority of Ireland (SEAI) gives us a clear, real-world snapshot of what homeowners paid in 2025 under the One Stop Shop scheme—and the numbers are both revealing and encouraging.
Let’s break it down.
Across 1,406 homes upgraded in 2025, the data shows a consistent pattern:
Interestingly, 74% of homeowners spent more than €50,000 on upgrades, highlighting a clear trend toward comprehensive retrofits rather than small fixes.
Mid-terrace homes show a noticeable jump in cost:
Upgrades often expand to include:
This reflects a shift toward whole-home energy solutions rather than isolated improvements.
These homes strike a balance between cost and impact:
Common upgrades:
Many homeowners in this category are aiming for deep retrofits, which explains the broader upgrade scope.
Detached homes are the most expensive to upgrade—but also offer the greatest potential for energy savings:
These projects typically include:
Larger surface areas and older construction often mean more work—but also bigger long-term gains.
Here’s how upgrade costs break down across all homes:
The takeaway: deep retrofits are becoming the norm, not the exception.
While the data highlights costs, the real value lies in outcomes:
Even modest upgrades can make a difference, but the trend clearly shows homeowners are opting for comprehensive, future-proof solutions.
Energy upgrades are a serious investment, but they’re no longer just about saving money on bills. They’re about:
With grants covering a meaningful portion of costs, the question is shifting from “Can I afford to upgrade?” to “Can I afford not to?”
If you’re planning a retrofit, the key is understanding your home type, setting a realistic budget, and thinking long-term. This data shows that while the upfront costs can be substantial, the combination of grants and long-term benefits makes energy upgrades more compelling than ever. To take the first step toward a warmer, more energy-efficient home, you can get started today with Activ8 Energies One Stop Shop.
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