A 2,000 square foot house is 186 square metres, which in UK terms is a large four bedroom detached home, or a generous five bedroom house if the rooms are modest. That size matters, because the cost of a heat pump is driven less by the price of the box on the wall than by how much heat your home loses on a cold day. How much is a heat pump for a 2000 square foot house? Expect to pay around £12,000 to £16,000 for an air source heat pump before any grant, or £4,500 to £8,500 after the £7,500 Boiler Upgrade Scheme grant. A ground source system for a house this size costs considerably more, typically £25,000 to £35,000 before the same grant. The rest of this guide breaks down where that money goes, what the grant takes off, what extras catch people out, and what the system costs to run.

How much is a heat pump for a 2000 square foot house? The short answer

How much is a heat pump for a 2000 square foot house? For most UK homes of this size, an air source heat pump costs £12,000 to £16,000 installed, before the grant. That figure covers the heat pump unit, installation labour, a hot water cylinder, controls and the associated plumbing. The Energy Saving Trust puts the typical cost of installing an air source heat pump at around £12,000 for an average home, and official Boiler Upgrade Scheme statistics record a median air source install of £12,908 in April to June 2026, with the middle half of installs costing between £11,100 and £15,600. A 2,000 square foot house sits above the average three bedroom semi, so it lands at the upper end of that range rather than the lower end.

After the Boiler Upgrade Scheme grant of £7,500, the out of pocket cost for an air source system is typically £4,500 to £8,500. Homes heated by oil or LPG with no mains gas connection can get £9,000 until 31 March 2027, which brings the cost down to £3,000 to £7,000. A ground source heat pump for the same house costs £25,000 to £35,000 before the grant, or £17,500 to £27,500 after it. The grant is the same £7,500 for either type. Installation is zero rated for VAT until 31 March 2027, after which the rate returns to 5 percent.

Those are planning figures, not quotes. Your installer will size the system from a room by room heat loss calculation, and that calculation, plus the state of your radiators and insulation, is what turns a planning figure into a price. Get at least three quotes from MCS certified installers, which is what the Energy Saving Trust recommends, and treat any quote given without a heat loss survey with suspicion.

What size heat pump does a 2000 square foot house need?

Heat pump size is measured in kilowatts of heat output, and it is set by heat loss, not by floor area alone. A rough starting point used across the UK industry is around 50 watts per square metre of floor space. For 186 square metres that gives about 9.3 kilowatts. But that rule of thumb assumes an average older home. A well insulated modern home might need only 30 to 50 watts per square metre, which is 5.6 to 9.3 kilowatts for a house this size, while a draughty Victorian home with solid walls and single glazing might need 65 to 85 watts per square metre, which is 12 to 16 kilowatts.

Installer sizing guides put a four bedroom detached home of 120 to 180 square metres at 10 to 16 kilowatts, and a four bedroom home of 130 to 200 square metres at 7 to 10 kilowatts. The two ranges disagree because they assume different levels of insulation, which is exactly the point. For a 2,000 square foot house, plan on a 10 to 12 kilowatt air source unit as the central case. A well insulated home may manage with 8 to 10 kilowatts, and a poorly insulated one may need 14 to 16 kilowatts, or a cascade of two smaller units.

Size affects price in two ways. The unit itself costs more as output rises, and a larger unit usually means more radiator work, because heat pumps run at lower flow temperatures than gas boilers and need larger radiators to deliver the same warmth. That is why two houses of the same size can receive quotes thousands of pounds apart. The honest answer to the sizing question only comes from a heat loss calculation, which your installer should do before quoting. It measures how fast each room loses heat through walls, roof, floor, windows and draughts on a cold design day, and it is also what the Boiler Upgrade Scheme requires for an eligible installation.

How much does a heat pump cost by system type?

The type of heat pump you choose changes the bill more than any other single decision. How much is a heat pump for a 2000 square foot house depends first on whether you pick air source or ground source, and the gap between them is wide.

The Energy Saving Trust puts a typical ground source system at around £15,000, but that is a baseline figure for a smaller system with trenches. Real installations for a house of this size run higher. Government grant data puts the median ground source install in 2025 to 2026 at around £26,200, and Boiler Upgrade Scheme statistics record a median of £27,232 for ground source installs in April to June 2026, with the middle half costing £18,100 to £42,100. For a 2,000 square foot house, the £25,000 to £35,000 range above is the realistic planning figure for a borehole system.

Air to air deserves a warning. At £2,500 to £4,000 it looks like a bargain, but it only heats air. It does not heat your hot water, so it cannot replace a boiler in a family home. For a 2,000 square foot house with baths and showers, air to water is the system the question is really about.

The other comparison worth making is with a gas boiler. A like for like combi boiler replacement typically costs £2,000 to £4,000 installed. A heat pump costs three to four times as much upfront, before the grant, and roughly one to two times as much after it. That gap is the whole debate. The heat pump then repays part of it through lower running costs and lower carbon, over a lifespan the Energy Saving Trust puts at 20 years or more, longer than the average gas or oil boiler. Whether the sums work for your home depends on what you are replacing, your tariff, and whether you can disconnect from the gas grid, which is covered below.

What the Boiler Upgrade Scheme grant takes off

The Boiler Upgrade Scheme is the main grant for heat pumps in England and Wales. It gives £7,500 towards an air source or ground source heat pump, £2,500 towards an air to air heat pump, and £5,000 towards a biomass boiler. Your installer applies for it and deducts it from your quote, so you never wait for a rebate. The property must be in England or Wales, the heat pump must replace a fossil fuel or electric heating system, and the installer must be MCS certified. Hybrid systems that keep a gas boiler alongside the heat pump do not qualify.

How much is a heat pump for a 2000 square foot house after the grant? On the central air source range, £4,500 to £8,500. There is one uplift worth knowing about. Until 31 March 2027, properties heated by oil or LPG with no mains gas connection get an extra £1,500, taking the total grant to £9,000. For a 2,000 square foot oil heated home, that brings the air source cost down to £3,000 to £7,000. The uplift started on 21 July 2026 and ends on 31 March 2027, so do not assume it will continue.

Two dates matter in the same window. Heat pump installations in homes are zero rated for VAT until 31 March 2027, and the rate returns to 5 percent from 1 April 2027. On a £14,000 installation, that change alone adds £700. The grant and the VAT relief both expire on the same day, so a quote taken in early 2027 is worth more than the same quote taken in April.

Scotland has separate support through Home Energy Scotland, with different amounts and rules, so the figures in this guide apply to England and Wales. New build homes are generally not eligible for the Boiler Upgrade Scheme, which is aimed at retrofits.

The extras that push the bill up

The headline install price is not always the final price. Five extras catch people out, and they are worth pricing before you commit.

Radiator upgrades. Heat pumps run at flow temperatures of around 35 to 55 degrees, while gas boilers run at 65 to 75 degrees. At the lower temperature, a radiator gives out less heat, so some radiators need to be larger. Installer estimates put radiator upsizing at £2,000 to £5,000 for a house of this size, depending on how many radiators need changing. Homes with underfloor heating usually avoid this cost altogether.

Hot water cylinder. If you currently have a combi boiler, you have no hot water cylinder, and a heat pump needs one. The Energy Saving Trust cost figure includes a cylinder, but check that your quote does too. A cylinder needs space, usually an airing cupboard, and that can be a genuine constraint in a house that has never had one.

Electrical work. A 10 to 12 kilowatt heat pump draws significant power, and older consumer units sometimes need upgrading. Your installer should check this during the survey. It is usually a few hundred pounds, not thousands, but it is the kind of item that appears as a surprise line on a quote if it was not surveyed.

Insulation first. The cheapest kilowatt is the one you never need. Loft insulation, cavity wall insulation and draught proofing reduce the heat loss calculation, which can shrink the heat pump you need and cut the price. In a draughty 2,000 square foot house, spending on insulation before the heat pump can be better value than buying a bigger unit. Some homes qualify for free insulation under ECO4 or the Warm Homes Local Grant, which is worth checking before you size anything.

Planning and siting. Most air source installations are permitted development and need no planning permission, but there are exceptions for listed buildings and conservation areas. The outdoor unit also needs space with good airflow, and noise rules apply. The MCS standard caps the predicted noise level at 42 decibels at the nearest neighbour’s habitable room window, and most modern units produce 40 to 50 decibels measured one metre from the unit. In England the one metre boundary rule was removed in 2025 and the permitted size limit rose from 0.6 to 1.5 cubic metres, which makes siting easier than it used to be.

What does it cost to run a heat pump in a house this size?

The install price is only half the question. Running costs decide whether the investment pays back, and here the maths is straightforward. A heat pump does not make heat, it moves it. The Energy Saving Trust says heat pumps are more than three times as efficient as a gas or oil boiler, and puts a typical seasonal performance factor at about 3.1, meaning 3.1 units of heat for every unit of electricity. Good installations can exceed 4.

At the Ofgem price cap for 1 October to 31 December 2026, electricity costs 26.32p per kilowatt hour and gas costs 7.97p. Divide the electricity price by the seasonal performance factor and a heat pump delivers heat at 8.49p per kilowatt hour of heat. A gas boiler at 85 percent efficiency delivers heat at 9.38p per kilowatt hour. On those rates, the heat pump is cheaper per unit of heat, but only just. The break even point is a seasonal performance factor of 2.81. Below that, the boiler wins. Above it, the heat pump wins. That is why the Energy Saving Trust says heat pumps can cost slightly more to run than a new gas boiler on a standard electricity tariff, but less on a heat pump time of use tariff, which charges less for electricity at off peak times.

Put numbers on a worked example. Take an illustrative annual heat demand of 15,000 kilowatt hours for a 2,000 square foot home, covering space heating and hot water. A gas boiler at 85 percent efficiency would burn 17,647 kilowatt hours of gas, costing £1,406.47 a year at 7.97p. A heat pump at a seasonal performance factor of 3.1 would use 4,839 kilowatt hours of electricity, costing £1,273.55 a year at 26.32p. The saving is £132.92 a year. If you can disconnect from the gas grid entirely, you also save the gas standing charge of £108.33 a year, which brings the total saving to about £241 a year. Your own demand will differ, and insulation is the biggest lever on it, but the structure of the maths is the same for any home.

Two things change the answer materially. First, the tariff. A heat pump time of use tariff with cheap overnight electricity can cut running costs significantly, and the Energy Saving Trust’s latest research shows that combining a heat pump with solar panels, a battery and a time of use tariff can cut bills substantially. Second, what you are replacing. Switching from an old oil boiler or electric storage heaters saves far more than switching from a new gas boiler, because the starting point is so much more expensive. The Energy Saving Trust calculates that an average three bedroom home saves around 1,900 kilograms of CO2 a year with a heat pump compared with a new gas boiler, and around 2,900 kilograms compared with an old gas boiler. A 2,000 square foot home with a larger heat demand would save more, but the Trust’s published figures are for the three bedroom case, so treat the direction as the point rather than the exact number.

Servicing is about £150 a year for a heat pump, according to the Energy Saving Trust, which is more than the £80 to £120 a year a gas boiler service typically costs. That difference is small against the install price, but it belongs in the running cost picture.

Is a heat pump worth it for a 2000 square foot house?

For a house this size, the case for a heat pump is strongest in three situations. You are replacing oil or LPG heating, where the fuel is expensive and the grant is £9,000 until March 2027. You are replacing an old, inefficient boiler, where the running cost gap is widest. Or you can pair the heat pump with a time of use tariff, and ideally solar panels, which is where the Energy Saving Trust’s research finds the shortest payback periods.

The case is weakest if you have a new gas boiler, a standard electricity tariff, and no plans to disconnect from gas. Then the running cost saving is thin, around £133 a year on the worked example above, and the install premium takes many years to repay. That does not make the heat pump a bad choice. It cuts carbon substantially and removes a fossil fuel appliance from the home. But it does make it a climate choice rather than a money choice, and it is better to decide with that clear in mind.

One more consideration is the future. The Future Homes Standard comes into force on 24 March 2027, and new homes in England must use low carbon heating and emit at least 75 percent less carbon than 2013 standards, so gas boilers effectively will not be fitted in new builds. There is no ban on gas boilers in existing homes, and the previously proposed 2035 phase out was dropped. A heat pump fitted now is not a bet on a ban. It is a bet that electricity prices will fall relative to gas over the 20 plus year life of the system, which is a reasonable expectation as the grid decarbonises, but it is a bet, not a certainty.

How to get a quote you can trust

Start with the Energy Saving Trust’s advice. Get quotes from at least three MCS certified installers, and make sure each one does a room by room heat loss calculation before quoting. A quote that sizes the system from floor area alone, or from the size of your old boiler, is not a serious quote. Heat pumps are not like boilers. You cannot simply match the old boiler’s output, because a heat pump’s efficiency varies with outdoor temperature and flow temperature.

Ask each installer to break the quote down. The unit, the cylinder, the controls, the radiator work, the electrical work, and the grant deduction should each be visible. Check that the £7,500 grant is deducted from the quote, not promised as a rebate later. Ask for the design flow temperature and the expected seasonal performance factor, and ask what happens to efficiency on the coldest days. A good installer will answer all of that without hesitation.

Finally, check the timing. The £9,000 uplift for oil and LPG homes and the 0 percent VAT rate both end on 31 March 2027. If you are planning a heat pump for a 2,000 square foot house, getting quotes before Christmas and booking the installation for early 2027 protects both. After that date, the same system costs £1,500 more in lost grant for an oil heated home, plus 5 percent VAT on the whole installation.

Frequently asked questions

How much is a heat pump for a 2000 square foot house?

How much is a heat pump for a 2000 square foot house? An air source heat pump costs £12,000 to £16,000 installed before the grant, or £4,500 to £8,500 after the £7,500 Boiler Upgrade Scheme grant. A ground source system costs £25,000 to £35,000 before the grant, or £17,500 to £27,500 after it. Homes heated by oil or LPG with no mains gas can get a £9,000 grant until 31 March 2027.

What size heat pump do I need for a 2000 sq ft house?

Most 2,000 square foot homes need a 10 to 12 kilowatt air source heat pump. Well insulated homes may manage with 8 to 10 kilowatts, while draughty older homes may need 14 to 16 kilowatts. The exact size comes from a room by room heat loss calculation, which your MCS certified installer should do before quoting. Do not size a heat pump from floor area alone.

How much is a heat pump for a 2000 square foot house after the grant?

After the £7,500 Boiler Upgrade Scheme grant, an air source heat pump for a 2,000 square foot house typically costs £4,500 to £8,500. If your home is heated by oil or LPG and has no mains gas connection, the grant rises to £9,000 for applications made before 31 March 2027, bringing the cost to £3,000 to £7,000. A ground source system costs £17,500 to £27,500 after the standard grant.

Is a ground source heat pump worth the extra cost for a large house?

A ground source heat pump is more efficient than an air source one, because the ground stays at a steadier temperature than the air in winter, and the Energy Saving Trust notes that a ground source system is likely to be more efficient than an equivalent air source one. But for a 2,000 square foot house the extra £13,000 to £19,000 of install cost buys only a modest running cost saving, and the payback period is much longer. For most homes, air source is the practical choice, unless you have a large garden for trenches or a strong reason to avoid an outdoor unit.

Do I need bigger radiators with a heat pump?

Often, yes. Heat pumps run at flow temperatures of around 35 to 55 degrees, while gas boilers run at 65 to 75 degrees, so existing radiators give out less heat and some need to be larger. Radiator upsizing typically adds £2,000 to £5,000 for a house of this size. Homes with underfloor heating usually need no radiator changes at all. Your installer should check every radiator as part of the heat loss survey.

Can a heat pump keep a 2000 square foot house warm in winter?

Yes, if it is sized correctly. Heat pumps are the most common type of domestic heat pump in the UK and are suitable for most types of homes, according to the Energy Saving Trust. The key is the heat loss calculation. An undersized heat pump will struggle on the coldest days and cost more to run, while an oversized one will cycle on and off and wear out faster. That is why the sizing survey matters more than the brand of the unit.

Sources

• Energy Saving Trust, Air source heat pumps: costs, savings and benefits. Typical installation around £12,000; more than three times as efficient as a gas or oil boiler; typical seasonal performance factor about 3.1; service around £150 a year; lifespan 20 years or more; get quotes from at least three MCS certified installers. https://energysavingtrust.org.uk/advice/air-source-heat-pumps
• Energy Saving Trust, Ground source heat pumps vs air source heat pumps. Typical air source cost approximately £12,000; ground source around £15,000; Boiler Upgrade Scheme £7,500 off either. https://energysavingtrust.org.uk/air-source-heat-pumps-vs-ground-source-heat-pumps
• Department for Energy Security and Net Zero, Boiler Upgrade Scheme statistics, August 2026 release, table Q1.1A, as reported by UK Home Energy. Median air source install £12,908 in April to June 2026, middle half £11,100 to £15,600; median ground source install £27,232 in the same period. https://www.ukhomeenergy.co.uk/guides/heat-pump-costs-uk/
• GOV.UK, Apply for the Boiler Upgrade Scheme. £7,500 towards an air source or ground source heat pump, £2,500 towards an air to air heat pump, £5,000 towards a biomass boiler; extra £1,500 until March 2027 for properties heated by oil or LPG with no mains gas connection; England and Wales; installer applies. https://www.gov.uk/apply-boiler-upgrade-scheme
• Ofgem, Energy price cap unit rates and standing charges. 1 October to 31 December 2026: electricity 26.32p per kilowatt hour, standing charge 54.83p a day; gas 7.97p per kilowatt hour, standing charge 29.68p a day. https://www.ofgem.gov.uk/your-energy-supply/your-energy-bill/energy-price-cap-unit-rates-and-standing-charges
• HMRC, VAT on energy saving materials and heating equipment, Notice 708/6. Heat pump installations zero rated until 31 March 2027, returning to 5 percent from 1 April 2027. https://www.gov.uk/guidance/vat-on-energy-saving-materials-and-heating-equipment-notice-7086
• Heat Pump Source, What size heat pump do you need? Four bedroom detached homes of 120 to 180 square metres need 10 to 16 kilowatts; sizing is based on heat loss, not floor area. https://www.heatpumpsource.co.uk/blog/what-size-heat-pump-do-you-need/
• Job Prices, Air source heat pump cost UK 2026. Three bedroom house £10,000 to £14,000 installed; bigger radiators add £2,000 to £5,000. https://www.jobprices.co.uk/costs/air-source-heat-pump/

Related reading

• Is It Cheaper to Run a Gas Boiler or a Heat Pump?
• Boiler Upgrade Scheme 2026: How to Claim £9,000 Towards a Heat Pump
• When Does 0% VAT on Heat Pumps End?

How much is a heat pump for a 2000 square foot house is a question with a range, not a single number, because the house itself sets the price. For most 2,000 square foot homes, budget £12,000 to £16,000 for an air source system before the grant, and £4,500 to £8,500 after it. Get three MCS certified quotes, insist on a heat loss survey, and check the grant and VAT deadlines before you book. The cheapest heat pump is the one sized for your home, not the one sized for your floor area.