Does a victorian terrace qualify for the Boiler Upgrade Scheme?

Yes — the £7,500 BUS grant applies to any owner-occupied or privately rented property in England or Wales with a valid EPC. Solid-wall recommendation often present on EPC — needs a documented exemption OR completion before BUS sign-off.

What size heat pump do I need for a victorian terrace?

8–14 kW thermal output is typical, with 11 kW being the median. The exact size depends on a heat-loss calculation per BS EN 12831, which your MCS-certified installer performs on a site visit.

What pre-install work is typically needed?

Loft insulation to 270 mm (gov.uk-compliant) — cheap fix, often present already. Draughtproofing around sash windows + suspended floor — £200–£500 of work, reduces heat-loss by 10–15%. An MCS-certified installer will confirm the exact scope on a site visit and price it into the quote.

Heat pump for a Victorian terrace: 2026 cost + sizing guide

What makes a victorian terrace different

Pre-1900 mid- or end-terrace house with solid walls, sash windows and a typical 80–110 m² floorplate.

From a heat-pump-sizing perspective, a victorian terrace has a design heat loss of 75–110 W/m² at the UK standard −2°C external design temperature (per PAS 2035). That translates to an annual space-heat demand of around 14,000–22,000 kWh and a recommended air-source heat pump capacity of 8–14 kW thermal. Smaller than gas-boiler sizing typically lands at — heat pumps run 24/7 at lower flow temperatures rather than cycling at 70°C.

Heat pump sizing + install figures — Victorian terrace
Parameter	Typical range	Notes
Floor area	80–110 m²	BEIS English Housing Survey median.
Design heat loss	75–110 W/m²	At −2°C external (UK design temp).
Annual heat demand	14,000–22,000 kWh	Space heating only, not DHW.
Recommended ASHP size	8–14 kW	Per BS EN 12831 sizing.
Pre-grant install cost	£12600–£18900	Including pump, cylinder, 1–3 radiator upgrades.
After BUS grant	£5100–£11400	£7,500 deducted by installer at invoice.
Common EPC band	Band E	Before retrofit work.
Typical install time	2–3 days	Whole-house including cylinder + radiator swaps.

Heat pump sizing + install figures — Victorian terrace— Ranges are typical for the archetype; specific quote depends on property survey by an MCS-certified installer.

BUS grant eligibility specifics for this property type

Solid-wall recommendation often present on EPC — needs a documented exemption OR completion before BUS sign-off.
Many Victorian terraces in conservation areas — heat pump external unit placement requires planning consent in some boroughs.
Original sash windows trigger draughtproofing recommendation; cheap to clear but must be addressed.

Pre-install upgrades typically needed

Most victorian terraces need some fabric or radiator work before the heat pump can be commissioned. The most common scope:

Loft insulation to 270 mm (gov.uk-compliant) — cheap fix, often present already.
Draughtproofing around sash windows + suspended floor — £200–£500 of work, reduces heat-loss by 10–15%.
Radiator upgrade in 1–3 rooms (typically large reception, kitchen, main bedroom).
Hot water cylinder install if currently on a combi boiler (~£1,500–£2,500).

The full scope is set by your MCS-certified installer’s heat-loss calculation. Most installers absorb the radiator swap and cylinder install within the BUS-grant pricing — you don’t have to coordinate them separately.

Is this archetype right for you?

Owner-occupiers who want a permanent heating upgrade, can absorb the modest pre-install fabric work, and have a single suitable outdoor wall for the ASHP unit.

Check your specific home

The figures above are typical for the archetype. Your specific property may sit at either end of the range depending on orientation, occupancy and prior retrofit work. Run a free Propertoasty pre-survey — combines your address, EPC and Google Solar API roof data into an installer-ready report in about five minutes.