“We know that the gas used to heat and power buildings is one of the biggest contributors to both carbon emissions and air pollution in Westminster,” said the Labour councillor.
“However, these new low-carbon district heat networks will tap into local waste heat sources, delivering clean and affordable energy.”
It is not yet known which buildings will connect to the heat network, which relies on using waste heat or sources such as the water of the River Thames to provide heat via underground pipes into buildings where a heat exchanger transfers it into existing hot water and central heating systems.
But the planned network covers the heart of London, including famous landmarks including Parliament, Whitehall and Westminster Abbey.
It will also include Grosvenor Bridge, in Pimlico and Victoria Station, to Temple Underground Station, near the Strand and bounded by St James’s Park.
Other buildings from the Tate Britain to Somerset House would also be able to access the low carbon heat in the network, as well as Westminster Council-owned properties.
Construction is due to begin in 2026.