Heat Pump Cost for a 2-Bed Terrace: Full 2026 Breakdown

The best price evidence is what installers actually charged. Every heat pump paid for through the Boiler Upgrade Scheme in England and Wales has its installed cost recorded on its MCS certificate, and the government publishes the median by heat pump size. In 2025/26 the median air source installation cost £11,494 at 4 to 6 kW, across 4,206 homes, and £12,164 at 6 to 8 kW, including the system, labour and VAT, before the grant.

That is more than many people expect for a small house, and it is the main thing the recorded data changed. A heat pump job has costs that do not shrink with the house: the survey and design, the cylinder, the controls, commissioning and the MCS paperwork. So a 2-bed terrace, with around 70 square metres of floor, two external walls and five to seven radiators, costs only a little less than a 3-bed semi, even though it needs one of the smallest heat pumps on the market. Our heat model puts a typical 2-bed mid-terrace at 6,300 kWh of heat a year and a heat pump of about 5.5 kW.

The cylinder is what separates a terrace from a semi. Many semis still have one in an airing cupboard; many terraces lost theirs when a combi went in, so the cylinder and a cupboard for it are a real part of the job rather than a swap. Everything else is smaller than on a bigger house, which is why the whole job after the grant is £2,500 to £6,500 against £3,500 to £8,000 for a 3-bed semi. If microbore pipework has to come out, the job moves towards the top of the range.

A mid-terrace loses heat through the front wall, the back wall, the roof and the floor, and little else, so it needs less heat than an end-terrace of the same size and about the same as a 2-bed flat. The costs follow the heat pump size, and what separates a mid-terrace from a flat is the installation rather than the running cost.

Most 2-bed terraces need a heat pump of around 5 to 6.5 kW. Our model puts a typical mid-terrace at 5.5 kW, a well insulated one at 5 kW and a pre-1919 terrace with solid brick walls and single glazing at 6.5 kW. That is the smallest end of most manufacturers' ranges, where the quietest and most compact units live. For comparison, the median air source heat pump fitted under the scheme in April to June 2026 was 8 kW.

The number that matters is the heat loss calculation, not the bedroom count. Your MCS installer must survey every room, work out how much heat each loses on a cold design day and size the unit to cover that and your hot water with a small margin. A quote without a room-by-room calculation was sized by guesswork, and an oversized unit on a small house spends the winter switching on and off.

Every major brand now sells at least one unit sized for a small terrace. These are the models you are most likely to be quoted, with specifications from each manufacturer's own pages.

Outputs from the manufacturers' product pages. Your heat loss calculation decides which one you need.

Which is best for a terrace? Depth matters, because the unit has to come through the hall. Sound power matters, because two neighbours' windows are close. Flow temperature matters, because an R290 unit that can run at 70 to 75°C can carry a couple of undersized radiators through the coldest week. Ask for a design flow temperature of 50°C or lower, the seasonal performance the installer expects at that temperature in writing, and an MCS 020(a) sound calculation for the exact yard position. Our heat pump noise guide explains the figures.

A heat pump runs the heating at a lower water temperature than a gas boiler, so radiators have to be larger to deliver the same warmth. A 2-bed terrace typically has five to seven, and two or three need upsizing, usually the living room, the kitchen-diner and the front bedroom. Our radiator sizing guide explains how installers decide which ones change.

Many 2-bed terraces run on a combi, so there is no hot water cylinder and often no cupboard for one. A heat pump needs a cylinder, and finding a home for it is the most common design problem on a terrace. The Energy Saving Trust says a cylinder can usually fit in any cupboard at least 80cm by 80cm. In order of preference: the old airing cupboard on the landing if it survives; the box room or a boxed-in corner of the back bedroom; the space a floor-standing boiler leaves in the kitchen; or the loft, which needs boarding, a strong ceiling and a slimline cylinder that fits through the hatch. The recorded job costs include the cylinder itself; building a cupboard for it may be extra. Tower units that put the cylinder and controls in one tall cabinet can solve the cupboard problem in one go.

Terraces built or replumbed from the 1970s onwards often have 8mm or 10mm microbore pipe. It is fine at boiler temperatures, but a heat pump moves more water at a lower temperature and microbore chokes it. The runs to the upsized radiators usually need replacing with 15mm pipe. Ask the installer to check pipe sizes during the survey.

A single-storey rear extension with a flat roof changes the pipe route. The outdoor unit usually sits beyond the extension, so the primary pipes run along or through it and then up to the cylinder: more insulation, more labour and a roof to seal where the pipes cross. Putting the unit on the flat roof keeps the yard clear but brings the fan closer to bedroom windows, needs a structural check, and the unit must sit at least one metre from the roof edge to stay within permitted development.

These figures use the Ofgem price cap for 1 October to 31 December 2026: electricity 26.32p per kWh and gas 7.97p per kWh. Gas rose about 9% at this cap change. Electricity barely moved because the government removed VAT from electricity bills from 1 October 2026 to 31 March 2027, so when 5% VAT returns every heat pump figure below rises by about 5%. Even now, a heat pump on a standard tariff costs slightly more to run than a gas boiler in a terrace this size.

On a heat pump tariff you save £134 a year against gas at today's prices, or about £113 once VAT returns to electricity, and disconnecting the gas supply saves a further £108 a year in standing charge. Insulation changes the answer more than the kWh do. A well insulated terrace with 5,355 kWh of demand runs at a seasonal efficiency near 3.05 and costs £474 on gas, £462 on a heat pump with a standard tariff and £328 on a heat pump tariff, so it beats gas on either tariff. A solid-walled terrace with 6,993 kWh runs nearer 2.55 and costs £619, £722 and £513, so the heat pump costs £103 a year more than gas on standard electricity and the tariff saving falls to £106. A badly insulated house does not make a heat pump pay better, it makes it pay worse. Read our running costs guide for the full comparison and our tariff guide for how to get an effective rate near 18.7p.

The Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump in England and Wales. Until 31 March 2027, a home heated by oil or LPG that has no mains gas connection gets an extra £1,500, making £9,000. On a typical 2-bed terrace the £7,500 grant covers roughly half to three quarters of the whole job, and you pay £2,500 to £6,500. Your MCS certified installer applies for it and it comes off the invoice. Regulations in force from 28 April 2026 extended the scheme to 2030 and removed the need for a valid EPC, although your installer records one if the home has it, and installations carry 0% VAT until 31 March 2027. A terrace qualifies like any other house, provided you own it and the heat pump replaces fossil fuel heating such as gas, oil, LPG or electric heating. Read our BUS grant guide for the rules, our grant checker for anything else you qualify for, and our Warm Homes Plan guide.

The government puts the average cost of a new gas boiler at about £3,500 including VAT, and our boiler vs heat pump comparison scales that by home size to about £3,200 for two bedrooms. Against that, the whole heat pump job at £2,500 to £6,500 after the grant ranges from £700 less to £3,300 more, plus any radiator or cupboard work that is not in the quote. At £134 a year saving on a heat pump tariff, the extra pays back in anything from immediately to about 25 years, or about 29 years once VAT returns to electricity. A terrace with generous radiators and a surviving airing cupboard sits at the bottom of that range. One that needs three radiators, a loft cylinder and new pipework does not pay back on running cost alone, and is a choice about getting off gas rather than about the money. On a standard tariff there is no running-cost saving to pay anything back, so a heat pump tariff is a condition of the case rather than a bonus. Run your own numbers with our boiler vs heat pump comparison, and read heat pump vs new boiler for the 15-year view.

Ground source does not work for a terrace: there is no room for a borehole rig or a trench loop. If your terrace is all-electric with storage heaters the comparison is much better for the heat pump; see our storage heaters vs heat pump guide.

Most terraces have no side access, so the outdoor unit goes in the rear yard. If there is a back lane it arrives through the rear gate. If not, it comes through the front door, the hall and the kitchen on a sack truck. Check the unit's depth and weight against your hall and doorways before the day, because a unit that has to be lifted over steps means an extra pair of hands.

Since 29 May 2025, permitted development in England has had no one metre boundary rule, so a spot against a side fence can qualify. What decides the position now is the MCS 020(a) sound calculation, which sets a limit of 37 dB at a point one metre outside the nearest window or door of a habitable room in each neighbouring home. Habitable rooms are bedrooms and living rooms; a kitchen used only for cooking does not count. The outdoor unit must also be no larger than 1.5 cubic metres, and a terrace can have only one. If no position in the yard passes the calculation, the installation needs a planning application rather than going ahead as permitted development. Our planning permission guide covers the exceptions, including listed terraces and conservation areas, where the unit cannot go on a wall facing the road.

On a mid-terrace you have two neighbours, and their back windows are typically only a few metres from any spot in your yard. In the calculation, every hard surface within a metre of the unit that reflects sound adds 3 dB, so a unit tucked into the corner where the rear outshot meets the main wall scores worse than one on an open stretch of wall facing down the yard. A solid fence or brick wall between the unit and the window counts as a barrier and often gets a terrace through. The calculation must be done for both neighbours; a unit forced into a tight corner may need a quieter model or an acoustic enclosure.

Most units have a quiet or night mode that caps fan and compressor speed, cutting sound at source for a little less output. Set it for the hours the house needs least heat. The sound calculation uses the manufacturer's declared sound power, so pick a quiet unit rather than relying on the setting. Anti-vibration feet stop the hum reaching the party wall, and the hum, not the fan, is what a neighbour in a terrace notices. Tell both neighbours before the survey.

Get three quotes from MCS certified installers and compare them on the design, not the headline price. Each should include:

• A room-by-room heat loss calculation with the design outdoor temperature stated.
• The design flow temperature, ideally 50°C or lower, and the expected seasonal performance.
• A radiator schedule listing all five to seven emitters, which ones change, and whether that work is in the price.
• The cylinder size and exactly where it goes, with the cupboard priced.
• The pipe route from the yard to the cylinder, and whether any microbore is replaced.
• An MCS 020(a) sound calculation for the exact yard position, with both neighbours' nearest windows marked.
• How the unit reaches the yard: through the house or by the back lane.
• The unit warranty, the installation warranty, and who you call when something fails.
• Confirmation that the installer claims the Boiler Upgrade Scheme and deducts it from the invoice.

Installation usually takes a few days, sometimes longer than a semi because everything comes in through the front door and the cylinder cupboard has to be built. Find installers through the MCS installer search. Read our old house guide if your terrace is pre-1919 with solid walls.

Installed costs from the DESNZ Boiler Upgrade Scheme statistics, August 2026, Table A1.3A (median cost by heat pump size, 2025/26, 30,590 air source installations) and Table Q1.1A (April to June 2026 quartiles). Costs are self-reported by MCS installers and include the system, labour and VAT, before the grant. Heat pump efficiency from the Electrification of Heat trial report (Energy Systems Catapult for DESNZ, December 2024, Table 1.2). Heat demand from our heat model, built on the DESNZ National Energy Efficiency Data-Framework (NEED) 2026. Measured insulation savings from NEED impact of measures 2026. Energy prices from the Ofgem price cap for October to December 2026. Heat pump tariff: Cosy Octopus at October 2026 rates with 60% of heating in the cheap hours and 10% in the 4pm to 7pm peak, as costed in our tariff guide. New gas boiler cost from the DESNZ Boiler Upgrade Scheme 2026 to 2030 summary business case, footnote 8, scaled by home size as in our boiler vs heat pump comparison. Grant rules from GOV.UK and The Boiler Upgrade Scheme (England and Wales) (Amendment) Regulations 2026. VAT from HMRC VAT Notice 708/6. Planning rules from the permitted development rules, Class G and MCS 020(a). Insulation costs from the Energy Saving Trust. Full method on our methodology and data sources pages. Heat pump specifications from the manufacturers: Vaillant aroTHERM plus, Mitsubishi Electric Ecodan, Daikin Altherma 3 R, Samsung EHS Mono, Octopus Cosy, Grant Aerona 290 and Ideal Heating Logic Air.