Darren O'Rourke (Meath East, Sinn Fein)
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100. To ask the Minister for Communications, Climate Action and Environment the number of homes that have achieved a B2 cost optimum standard in each of the years 2020 to 2022 and to-date in 2023, in tabular form. [20961/23]

Darren O'Rourke (Meath East, Sinn Fein)
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102. To ask the Minister for Communications, Climate Action and Environment to provide a breakdown of the average cost to retrofit a home to a BER cost optimum standard for each retrofit scheme under subhead B4 in tabular form. [20963/23]

Darren O'Rourke (Meath East, Sinn Fein)
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103. To ask the Minister for Communications, Climate Action and Environment to provide a breakdown of the average cost to retrofit a home to a BER cost optimum standard for each retrofit scheme under subhead B4 in each of the years 2020 to 2022 and to-date in 2023, in tabular form. [20964/23]

Darren O'Rourke (Meath East, Sinn Fein)
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107. To ask the Minister for Communications, Climate Action and Environment the number of homes that have been retrofitted to a B2 cost optimum standard under the One-Stop-Shop scheme also had a heat pump installed in 2022 and to-date in 2023, in tabular form. [20968/23]

Eamon Ryan (Dublin Bay South, Green Party)
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I propose to take Questions Nos. 100, 102, 103 and 107 together.

The Climate Action Plan and National Retrofit Plan set ambitious targets to retrofit the equivalent of 500,000 homes to a Building Energy Rating of B2 and to install 400,000 heat pumps in existing buildings by the end of 2030. The Retrofit Plan estimates that, between 2019 and 2025, almost 185,000 home energy upgrades will be delivered with over 83,000 to a B2/cost optimal level. When the emissions savings from the non-B2 upgrades are included, this is the equivalent of 120,000 B2 upgrades over the period. As a result, there will be a need to deliver, on average, approximately 75,000 B2-equivalent home upgrades per year from 2026 to 2030 to achieve the overall target of 500,000 by 2030.

It is important to note the Building Regulations require that for existing buildings undergoing major renovations, a cost-optimal level of energy performance is achieved. These Regulations equally apply to home energy upgrades supported through SEAI residential and community retrofit schemes. A major renovation is where more than 25% of the building’s surface area is being renovated (e.g. installing external wall insulation on a home). The cost-optimal level is defined as either:

• A primary energy performance of less than 125kWh/m2/year (Building Energy Rating B2); or
• An upgrade of the wall insulation, ceiling insulation and heating system.