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Heating System Replacement Cost in London

Estimated £13,289£20,786
Itemized cost breakdown
ItemEstimate
Outdoor condenser unit£4,886
Furnace / heating unit£1,730
Evaporator coil / air handler£1,305
Refrigerant lineset & connections£954
Installation labor£4,368
Permit, disposal & startup£954
Subtotal£14,198
VAT (20%)£2,840
Total inc. VAT£17,038

How we estimate these costs →

What affects heating system replacement cost in London

Heating System Replacement costs in London differ from the national baseline mainly because of local labor rates. Construction-trades wages in London run about 12% above the GB mean (ONS ASHE), used here as a disclosed proxy for heating engineers, the largest upward labour adjustment of any GB region, significantly lifting installation cost. The urban heat-island effect keeps London the mildest and lowest-heating-demand region in the dataset, so heat pumps can run smaller — but it also drives the UK's strongest summer cooling interest, making air-to-air units in flats more common here than anywhere else in the country. A heating-system replacement in London is notifiable under Building Regulations (Gas Safe or MCS sign-off); the capital's high density of conservation areas and listed buildings means an external heat-pump unit often needs prior planning consent, and tight terraced access adds to siting cost. Heating-system work carries 20% VAT (UK-wide); domestic heat-pump installs are currently zero-rated separately — see header caveat.