Can I combine BUS with other grants?

Yes typically with ECO4 (insulation), Warm Homes Discount, and borough top-ups. Cannot combine with previous BUS voucher on same property.

Does my flat qualify?

Yes if you own freehold or have landlord consent. Air source heat pumps need an external unit — leaseholders need lease check + landlord consent (often refused on flats).

What if my EPC recommends insulation?

You must address it (or have a valid exemption) before BUS application. Loft and cavity wall typically cheap to fix and improves heat pump performance.

Does Builderr include BUS in renovation quotes?

Yes when replacing heating — our MCS-certified install partner lodges the application and deducts from the invoice.

Quick Answer

Am I eligible for the Boiler Upgrade Scheme (BUS) grant in London?

The Boiler Upgrade Scheme (BUS) gives £7,500 toward an air source heat pump or biomass boiler in England, including all London boroughs. Eligibility: homeowner or small landlord (≤4 properties), valid EPC within last 10 years with no outstanding loft or cavity insulation recommendations, MCS-certified installer, capacity ≤45kWth. Property must be in England (Wales/Scotland use separate schemes). Voucher valid 6 months from issue.

Full House Renovations →Get a Free Quote

Eligibility criteria

Single property up to 45kWth heating capacity. Valid EPC (≤10 years old) with no outstanding recommendations for loft insulation, cavity wall insulation or floor insulation. Existing heating system being replaced (or extended). Property must not be a new build (some exceptions). Self-builders eligible.

Application process

MCS-certified installer applies for voucher on your behalf via Ofgem portal. Voucher issued within 3–5 working days. Installation must complete within 6 months. Voucher value (£7,500) is deducted from your invoice; installer claims from Ofgem. No upfront payment from homeowner of the grant portion.

When BUS is insufficient

Typical London ASHP install £12,000–£20,000. BUS covers £7,500 — homeowner pays £4,500–£12,500. Some boroughs run top-up schemes (Wandsworth, Sutton, Camden — check current year). London Power's domestic energy advice service can identify additional support.

Ready to get started?

Senior consultant call within one business hour. Free desk-based planning assessment. Fixed-scope quote — no provisional sums, no day-rate creep.