Ireland's Climate Action Plan sets out a legally binding pathway to decarbonise the heating sector. For the 1.7 million Irish homes currently using natural gas or oil boilers, this means a fundamental change is coming. Here is the honest picture of what the gas boiler restrictions mean, the timeline, and what you should actually do if you own or rent a home in Ireland right now.
What Has Already Changed: New Builds
Since 2022, new residential buildings in Ireland cannot connect to the gas network. Planning permissions no longer allow new gas connections in most residential developments under Part L of the Building Regulations. This means newly built homes are being designed and built around heat pumps, district heating, or other low-carbon systems from the outset.
If you are buying a new-build home in 2026, it will almost certainly be heated by a heat pump — typically an air-to-water heat pump connected to underfloor heating or low-temperature radiators.
The Existing Stock: No Outright Ban Yet
There is no current law banning gas boilers in existing Irish homes. The government's position, as set out in the Climate Action Plan and advised by the Climate Change Advisory Council, is a phased transition — not an immediate removal.
The proposed trajectory is:
- By 2025: 400,000 homes retrofitted under the SEAI Home Energy Upgrade Scheme (this target has been revised due to supply chain constraints)
- By 2030: A significant majority of new heating system installations to be heat pumps or other low-carbon alternatives
- By 2050: Near-complete decarbonisation of residential heating
What this means in practice: if your gas boiler breaks down in 2026, you can still replace it with another gas boiler — there is no legal prohibition. However, planning policy, building regulations, and grant support are all being steered toward heat pump alternatives.
The Financial Reality of Switching to a Heat Pump
A heat pump installation in an existing Irish home typically costs €10,000–€20,000 depending on the type (air-to-water vs ground source), the radiator system, and whether the house needs insulation upgrades first.
SEAI grants currently cover:
- Air-to-water heat pump: up to €6,500
- Ground-source or water-source heat pump: up to €6,500
- Underfloor heating: up to €3,500
- Heating controls: up to €700
The net cost for a typical air-to-water heat pump installation with controls and heating upgrades is therefore typically €7,000–€14,000 after grant.
Whether this makes financial sense depends heavily on:
- Your current gas tariff and consumption
- The electricity tariff you will use to run the heat pump
- Your home's insulation level (heat pumps work best in well-insulated homes)
- The coefficient of performance (COP) your heat pump achieves in your specific installation
When Heat Pumps Make Financial Sense
A heat pump running at a COP of 3 (three units of heat per unit of electricity consumed) is equivalent in energy terms to a gas boiler running at 300% efficiency. Since Irish gas prices are around 7–8 cent/kWh and electricity is 28–32 cent/kWh, the economics depend strongly on what COP your heat pump achieves.
Rough break-even guide:
- At COP 3.5+: heat pumps are cheaper to run than a gas boiler in most Irish homes
- At COP 2.5–3.0: costs are broadly similar
- At COP below 2.5: gas is likely cheaper to run
Modern air-to-water heat pumps in properly installed and well-insulated Irish homes typically achieve COP 3–4 in Irish climate conditions. Poorly insulated homes, incorrectly sized systems, or high-temperature radiators reduce this significantly.
The cheapest way to run a heat pump is on an electricity tariff with a low night rate — typically around 12–14 cent/kWh on smart meter night-rate tariffs. Scheduling your heating to run primarily during off-peak hours can cut heat pump running costs by 30–40% compared to running on a flat rate.
What to Do if Your Boiler Needs Replacing Soon
If your gas boiler is approaching end of life (typically 15–20 years), you face a decision:
Option 1 — Replace like-for-like with a gas boiler Costs €2,000–€4,000, requires no home upgrades, and buys you another 15 years before the question arises again. The risk: gas tariffs may rise as carbon pricing increases, and eventually a regulatory phase-out may require a forced conversion at a less convenient time.
Option 2 — Switch to a heat pump now Higher upfront cost (net €7,000–€14,000 after grant), but locks in lower running costs if your home is well-insulated, and gets ahead of any future regulatory requirements. SEAI grants currently available may not be as generous in future years as carbon policy tightens.
Option 3 — Insulate first, then decide If your home is rated D or below on the BER scale, upgrading insulation first is often the right sequence. Insulation reduces your heating demand dramatically and improves the COP of any heat pump you subsequently install.
The Gas Tariff Question
For households staying on gas in the near term, the right action is identical to electricity: make sure you are on the cheapest available gas tariff.
The gap between the most expensive and cheapest gas tariff in Ireland is regularly €150–€300/year for average usage. Switching gas supplier is as straightforward as switching electricity — compare Irish gas tariffs here.
Summary
- Gas boilers are banned in new builds from 2022 onwards — this is already in effect
- No ban on existing homes — you can still replace a broken boiler with gas
- Government trajectory points toward requiring heat pumps for new installations by ~2030
- SEAI grants of up to €6,500+ available now for heat pump installation
- Financial case for heat pump depends on insulation level, installation quality, and electricity tariff
- For homes staying on gas, switching to the cheapest gas tariff remains the quickest saving