Heat Pump Cost for a 2-Bed Terrace: Full 2026 Breakdown
An air source heat pump for a 2-bed terrace costs £8,000 to £10,000 installed, and the £7,500 Boiler Upgrade Scheme grant brings that down to £500 to £2,500. Add radiator changes and the hot water cylinder a combi-heated terrace does not have, and the realistic total is £3,500 to £6,500 after the grant. At the Ofgem price cap for October to December 2026 the running cost is £497 a year on a heat pump tariff, £211 less than gas. The difficulty is not the money but the yard: no side access, two party walls and a few metres between the back door and the neighbour's kitchen window. This guide covers both.
In this guide
What a 2-bed terrace heat pump really costs Complete cost breakdown Terrace versus flat versus semi What size heat pump for a 2-bed terrace Which heat pumps suit a small terrace Radiators, cylinder and pipework Running costs: 2-bed terrace The Boiler Upgrade Scheme for a terrace Is a heat pump worth it for a 2-bed terrace Noise, the rear yard and two party walls Getting quotes: what to check Frequently asked questionsWhat a 2-bed terrace heat pump really costs
Across every house type in England and Wales, the median air source heat pump installation funded by the Boiler Upgrade Scheme cost £12,908 in April to June 2026, with a quarter of jobs under £11,128, according to MCS. A 2-bed terrace sits well below that lower quartile. It is 60 to 80 square metres, a mid-terrace loses heat through only two external walls, it needs the smallest unit most manufacturers make and it has five to seven radiators rather than ten. That is why the realistic range is £8,000 to £10,000 before the grant.
| Terrace type | Heat demand | Heat pump size | Installed cost | After £7,500 grant |
|---|---|---|---|---|
| Well insulated (270mm loft, filled cavity or insulated solid walls, double glazed) | 6,000 to 8,000 kWh | 4 to 5 kW | £8,000 to £9,000 | £500 to £1,500 |
| Typical terrace with loft insulation, filled cavity or single-skin brick walls, double glazed | 8,000 to 10,000 kWh | 5 to 7 kW | £8,000 to £10,000 | £500 to £2,500 |
| Solid brick walls and single glazing, little insulation | 11,000 to 13,000 kWh | 7 to 9 kW | £9,500 to £11,500 | £2,000 to £4,000 |
Installed cost covers the unit, labour, pipework, controls, commissioning and the MCS certificate. Radiators and cylinder are separate, below. Most pre-1919 brick terraces start in the bottom row. Use our heat pump calculator for an estimate that reflects your own insulation and fuel.
Complete cost breakdown
| Cost element | Range | Notes |
|---|---|---|
| Heat pump unit and installation | £8,000 to £10,000 | 5 to 7 kW air source. Includes unit, pipework, controls, MCS certificate |
| BUS grant | -£7,500 | Deducted from the installer invoice. £9,000 if you are replacing an oil or LPG boiler, which is rare on a terrace |
| Net heat pump cost | £500 to £2,500 | What you pay for the heat pump itself |
| Radiator upgrades | £1,500 to £2,000 | 2 to 3 of the usual 5 to 7 radiators need upsizing. See radiator sizing guide |
| Hot water cylinder | £1,000 to £1,200 | 150 to 180 litres for one or two people. Needed because almost every terrace runs on a combi |
| Pipework modifications | £300 to £500 | New primary runs from the yard to the cylinder. More if microbore has to come out |
| Concrete plinth | £200 to £300 | Base for the outdoor unit in the yard |
| Total out of pocket | £3,500 to £6,500 | After the BUS grant, including all ancillary costs |
0% VAT applies until March 2027. Costs from MCS installation data and Energy Saving Trust.
The cylinder is what separates a terrace from a semi. Most semis already have one in an airing cupboard; most terraces lost theirs when a combi went in, so the cylinder and a cupboard for it are a real cost rather than a swap. Everything else is smaller than on a bigger house, which is why the whole job after the grant is £3,500 to £6,500 against £4,300 to £10,000 for a 3-bed semi. If microbore has to come out, the pipework line can double.
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Terrace versus flat versus semi
A mid-terrace loses heat through the front wall, the back wall, the roof and the floor, and nothing else, so it needs less heat than an end-terrace of the same age and only a little more than a flat. The costs follow the heat loss.
| Property | Typical heat demand | Heat pump size | Installed cost | After £7,500 grant |
|---|---|---|---|---|
| 2-bed flat | 5,000 to 7,000 kWh | 5 to 6 kW | £7,500 to £9,000 | £0 to £1,500 |
| 2-bed mid-terrace | 7,000 to 9,000 kWh | 5 to 7 kW | £8,000 to £10,000 | £500 to £2,500 |
| 2-bed end-terrace | 9,000 to 11,000 kWh | 6 to 8 kW | £8,500 to £10,500 | £1,000 to £3,000 |
| 3-bed semi-detached | 12,000 to 15,000 kWh | 8 to 10 kW | £9,000 to £12,000 | £1,500 to £4,500 |
Heat demand assumes loft insulation, double glazing and filled cavities where present. The end-terrace row adds one exposed wall, roughly 1,500 to 2,000 kWh a year on a house this size. See our costs by house type guide, our flats guide for a converted terrace flat, and our 3-bed semi guide for the next size up.
What size heat pump for a 2-bed terrace
Most 2-bed terraces end up with a 5 to 7 kW air source heat pump, and a well-insulated one with a 4 or 5 kW unit, the smallest output most manufacturers make. That is where the quietest, cheapest and most compact units live. A pre-1919 terrace with solid brick walls and single glazing pushes to 7 to 9 kW, a full size class up, which is worth avoiding by insulating first.
The number that matters is the heat loss calculation, not the bedroom count. Your MCS installer must survey every room and work out how much heat it loses on the design day, around minus 3C. A typical 70 square metre mid-terrace with loft insulation and double glazing loses 3 to 4 kW at that temperature, and the unit covers that plus 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.
Insulate first to drop a size class
Loft insulation (£300 to £600), draught-proofing and, on a Victorian house, insulating the suspended timber floor are the cheap wins. On a solid-walled terrace, internal wall insulation is a smaller job than on any other house type, because only the front and back walls need it. Together these can take an 11,000 kWh terrace under 9,000 kWh and the heat pump from 7 to 9 kW down to 5 to 7 kW. If you receive a qualifying benefit, ECO4 or the Great British Insulation Scheme may pay for it.
Which heat pumps suit a small terrace
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.
| Model | Outputs | Refrigerant | Max flow temp | Why pick it |
|---|---|---|---|---|
| Vaillant aroTHERM plus | 3.5 kW, 5 kW | R290 | 75C | Runs hot enough to keep most existing radiators; Quiet Mark; the 3.5 kW suits a well-insulated terrace |
| Mitsubishi Ecodan | 5 kW, 6 kW (R290); 5 kW Compact, 6 kW Ultra Quiet (R32) | R290 or R32 by model | 75C (R290), 60C (R32) | Largest UK installer base and easy servicing; the R290 and R32 Ultra Quiet ranges are both built for tight plots |
| Daikin Altherma 3 R | 4 kW, 6 kW | R32 | 65C | Compact outdoor unit for a narrow yard, widest installer network, best on a low-temperature design |
| Samsung EHS Mono | 5 kW | R32 | 65C | Value option; at 330mm deep it is the slimmest here and the easiest to carry through the house |
| Octopus Cosy 6 | 6 kW nominal (5.6 kW at 50C flow) | R290 | 75C | Installed and supported by Octopus with its Cosy tariff; one price, one company to call |
| Grant Aerona 290 | 4 kW, 6.5 kW | R290 | Not published (rated at 55C) | Strong installer network outside the big cities; the 4 kW suits a well-insulated terrace |
| Ideal Logic Air | 4 kW, 5 kW | R32 | 55C | Boiler-brand pricing and warranty, Quiet Mark; a low-temperature unit for properly sized radiators |
Nominal 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 running at 65 to 75C can carry a couple of undersized radiators through the coldest week. Ask for a design flow temperature of 50C or lower, a seasonal coefficient of performance (SCOP) above 3.5 in writing, and an MCS 020 noise assessment for the exact yard position. Our heat pump noise guide explains the figures.
Radiators, cylinder and pipework
A heat pump heats water to 40 to 50C instead of the 65 to 75C a gas boiler uses, 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. Budget £1,500 to £2,000. Our radiator sizing guide explains how installers decide which ones change.
Almost every 2-bed terrace runs on a combi, so there is no hot water cylinder and usually no cupboard for one. A heat pump needs a cylinder, 150 to 180 litres for one or two people, and finding a home for it is the most common design problem on a terrace. 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. Allow £1,000 to £1,200 for the cylinder and £300 to £500 for the pipework to reach it. Tower units that put the cylinder and controls in one fridge-sized 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, and if the whole house is microbore the pipework line rises to £500 to £1,000. 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 two bedroom windows, needs a structural check, and the unit must sit at least one metre from the roof edge to stay within permitted development.
Running costs: 2-bed terrace
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 9% at this cap change while electricity barely moved, so a heat pump on a standard tariff now costs about the same to run as a gas boiler.
| Heating system | Annual cost | Saving vs gas |
|---|---|---|
| Gas boiler | £708 | Baseline |
| Heat pump (standard tariff) | £726 | -£18 (about level) |
| Heat pump (heat pump tariff) | £497 | £211 saving |
8,000 kWh heat demand, a typical insulated 2-bed terrace. Gas at 7.97p/kWh and 90% boiler efficiency. Heat pump COP 2.9 at 26.32p/kWh, or 18p/kWh effective on a well-scheduled heat pump tariff such as Octopus Cosy. Standing charges excluded.
On a heat pump tariff you save £211 a year against gas, £4,220 over 20 years, and disconnecting the gas supply saves a further £108 a year in standing charge. A well-insulated terrace with 6,000 kWh of demand costs £531 on gas, £545 on a heat pump with a standard tariff and £372 on a heat pump tariff. A solid-walled terrace with 12,000 kWh costs £1,063, £1,089 and £745, so the saving grows to £318 as the house gets harder to heat. Read our running costs guide for the full comparison and our tariff guide for how to get an effective rate near 18p.
The Boiler Upgrade Scheme for a terrace
The Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump in England and Wales, and since July 2026 £9,000 for homes replacing oil or LPG, which rarely applies to a terrace. A terrace at the bottom of the price range is the case the grant was designed for: £8,000 installed, £7,500 grant, £500 to pay. Your MCS-certified installer applies for it and it comes off the invoice. The scheme runs to 2030, installations carry 0% VAT until March 2027, and a terrace qualifies like any other house provided it has a valid EPC and the heat pump replaces a fossil fuel system. Read our BUS grant guide for the rules, our grant checker for anything else you qualify for, and our Warm Homes Plan guide.
Is a heat pump worth it for a 2-bed terrace
Against a new combi at £2,000 to £3,500, the whole heat pump job at £3,500 to £6,500 after the grant costs nothing to £4,500 more. At £211 a year saving on a heat pump tariff, payback runs from immediate to a little over 20 years, so the case depends on the radiators and the cylinder more than on the heat pump. A terrace with generous radiators and a surviving airing cupboard pays back in under five years; one that needs three radiators, a loft cylinder and new pipework is a closer call. A heat pump also lasts 20 to 25 years against 12 to 15 for a combi. 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: no room for a borehole rig and nowhere near the 200 square metres a trench loop needs. 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.
Noise, the rear yard and two party walls
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. Small monobloc units weigh 85 to 110 kg and are 330 to 600mm deep, so they fit a standard doorway, but tell the installer about narrow halls and steps, because a unit that has to be lifted means an extra pair of hands on the day.
Permitted development in England requires the outdoor unit to sit at least one metre from every boundary. In a yard four to five metres wide that rules out both side fences and often leaves a single strip against your own back wall. Measure the yard before the survey. If no position clears every boundary you need a planning application, with a fee and up to eight weeks, rather than a permitted development installation. Our planning permission guide covers the exceptions, including listed terraces and conservation areas, where the unit cannot go on a wall facing the road.
The MCS 020 noise standard requires the sound at the nearest habitable room window of a neighbouring house to be 42 dB or lower. On a mid-terrace you have two neighbours, and their back bedroom and kitchen windows are typically two to four metres from any spot in your yard. The calculation adds 3 dB for every hard surface that reflects the sound, 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 close-boarded fence or brick wall between the unit and the window counts as a barrier and often gets a terrace through. The assessment must show both neighbours' nearest windows; a unit forced into a tight corner may need an acoustic enclosure at £300 to £800.
Every unit in the table has a quiet or night mode that caps fan and compressor speed, cutting sound at source by a few decibels for a little less output. Set it for 11pm to 7am, when the house needs least heat. It does not count towards the MCS 020 assessment, which uses the unit's declared sound power at full output, so pick the quietest 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.
Getting quotes: what to check
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 50C or lower, and the expected SCOP.
- A radiator schedule listing all five to seven emitters and which ones change.
- 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 noise assessment for the exact yard position, with both neighbours' nearest windows and the boundary distances marked.
- How the unit reaches the yard: through the house or by the back lane.
- The unit warranty, usually 5 to 7 years, 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 takes 2 to 3 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, and read our old house guide if your terrace is pre-1919 with solid walls.
Reduce the hum reaching the party wall with anti-vibration pads under the unit's feet.
Frequently asked questions
How much does a heat pump cost for a 2-bed terrace?
£8,000 to £10,000 installed. After the £7,500 BUS grant you pay £500 to £2,500 for the heat pump, or £3,500 to £6,500 with radiators and a cylinder.
What size heat pump does a 2-bed terrace need?
5 to 7 kW for most terraces, 4 to 5 kW for a well-insulated one, 7 to 9 kW with solid brick walls and single glazing. The installer's heat loss calculation decides. Insulate first to bring the size and cost down.
How much does a heat pump cost to run in a 2-bed terrace?
£497 a year on a heat pump tariff, £726 on standard electricity, against £708 for gas at the October to December 2026 price cap, for 8,000 kWh of heat. See our running costs guide.
Where does the outdoor unit go on a mid-terrace house?
In the rear yard, at least one metre from every boundary. With no side access it is carried through the house, or delivered through the back gate if there is a rear lane.
Do I need planning permission for a heat pump on a terrace?
Usually not. It is permitted development in England if the unit sits at least one metre from every boundary, passes the noise assessment at both neighbours' windows and the house is not listed or in a conservation area facing a road. See our planning permission guide.
Is a heat pump worth it for a 2-bed terrace?
Yes on a heat pump tariff when the radiators need little work. You save £211 a year against gas, the unit lasts 20 to 25 years, and at the bottom of the range the grant covers nearly all of it. A terrace needing three new radiators and a loft cylinder is a closer call. Compare with our boiler vs heat pump tool.
Data sources
Installed prices from the MCS Data Dashboard (BUS-funded installations, England and Wales, April to June 2026). Energy prices from the Ofgem price cap for October to December 2026. Grant rules from GOV.UK. Cost ranges from Energy Saving Trust and installer market data. Heat pump outputs, refrigerants and flow temperatures from the manufacturers' product pages: Vaillant aroTHERM plus, Mitsubishi Electric Ecodan, Daikin Altherma 3 R, Samsung EHS Mono, Octopus Energy Cosy 6, Grant Aerona 290 and Ideal Heating Logic Air.