Grid Decarbonisation & Energy Security
FHS homes are designed to become fully zero carbon as the electricity grid decarbonises. Understanding the grid context is essential to understanding why the FHBS matters.
Zero-Carbon Ready Buildings
The FHBS creates zero-carbon ready buildings — homes and buildings that will not require any retrofit work to achieve zero operational carbon emissions once the electricity grid is fully decarbonised. This is a deliberate design choice: by eliminating fossil fuel heating and installing renewable electricity generation, the carbon emissions of FHS buildings reduce automatically as grid electricity becomes cleaner.
Clean Power 2030 Mission
The government is committed to delivering clean power by 2030, making the electricity grid increasingly low-carbon. As the grid decarbonises, the operational emissions from electricity-powered heat pumps, lighting, and appliances in FHS buildings decrease correspondingly. This means the carbon savings of the FHBS grow over time without any action from building occupants.
Energy Security Benefits
Higher standards of energy efficiency and cleaner heat sources reduce England's dependence on imported fossil fuels, improving energy security. The OBR estimates that if gas price spikes occur every decade, the cost could reach 2–3% of GDP annually — potentially making gas dependence twice as costly as the net zero transition. Energy-secure buildings are less vulnerable to geopolitical conflicts or global supply disruptions that inflate prices.
Grid Connections & Export
New FHS buildings with solar PV can export surplus generation to the local electricity network via the Smart Export Guarantee. Distribution Network Operator approval is required for export connections. Grid infrastructure may require upgrades in some locations, and the government expects both costs and delays to reduce over time as grid infrastructure improves. For generating capacities over 5MW, national grid approval is required, though less than 1% of new buildings are expected to reach this threshold.