How much do heat pumps for businesses cost?

The honest answer to "how much does a commercial heat pump cost" is that it depends on three things: the heat output your building actually needs, the state of your existing emitters and pipework, and whether your electrical supply can take the extra load without a network upgrade. A small office air-source retrofit can land near the bottom of the £60,000 range. A multi-megawatt heat network serving a campus runs into the millions. Anyone who quotes you a firm figure before surveying your building and reading your gas consumption is guessing, and that guess usually unravels on site.

Below is how the numbers break down by technology, what drives the variation, and how businesses actually pay for these systems in 2026. We model every project from real data, not rules of thumb, so treat the ranges here as a planning guide rather than a quote.

What you are actually paying for

A commercial heat pump project is not a single product, it is a system. The heat pump units themselves are often less than half the installed cost. The rest goes on the plant room or external compound, the hydraulic connections, controls and metering, any emitter upgrades needed to run at a lower flow temperature, the electrical works, and, where the system is large, a Distribution Network Operator (DNO) supply upgrade. Sizing is driven by your building's peak heat-loss and its annual heat demand profile, not by floor area, which is why we always start with a heat-loss survey and at least twelve months of gas or oil consumption data.

The single biggest lever on lifetime cost is flow temperature. Every degree you can drop the flow temperature lifts the Seasonal Coefficient of Performance (SCOP), and a higher SCOP means lower running cost for the life of the system. A heat pump delivering an SCOP of 3.5 produces three and a half units of heat for every unit of electricity it draws. That is why we design for 45 to 55C wherever the emitters allow it, and survey your existing radiators or fan coils before assuming a strip-out is needed.

Indicative cost by technology

Air-source heat pumps are the lowest-capital, lowest-disruption route because there are no ground works. A commercial air-source system typically runs from £60,000 for a single-building retrofit up to around £600,000 for a cascaded bank serving a large mixed-use site. Ground-source costs more, usually £150,000 to £2m and beyond, because of borehole drilling or ground-loop installation, but it returns the highest and most stable SCOP, often above 4.0 year-round, and can provide low-cost summer cooling. Hybrid boiler-replacement retrofits, where the heat pump covers the bulk of the load and a peaking boiler handles the coldest days, fall between £70,000 and £500,000 and are frequently the most cost-effective decarbonisation route for buildings with high-temperature emitters. High-temperature and process heat pumps for manufacturing, laundries and food production, and full heat networks, sit at the top end and are quoted bespoke. The cards below set out the typical project value and payback for each route.

What drives the variation

Two buildings of the same floor area can carry very different costs. The factors that move the number most are: the condition and flow-temperature compatibility of your existing emitters, whether the plant room has space or a new external compound is needed, acoustic constraints (a BS 4142 assessment is commonly required to show external units will not disturb neighbours), and above all the electrical supply. Large heat pumps add meaningful load, and where a DNO supply upgrade is needed it is often the longest-lead and least predictable item in the whole project. We start that conversation at feasibility stage precisely so it does not surprise anyone at the end.

Running cost, the number that actually matters

Capital cost gets the attention, but running cost decides whether the project makes sense. Electricity currently costs roughly three to four times the unit price of gas, so without a good SCOP and a sensible tariff the running-cost case can look marginal on paper. The reverse is also true: a well-designed system with a low flow temperature and a SCOP of 3.5 or better offsets most of that price gap, and the gap keeps narrowing as gas carbon levies rise and the electricity grid decarbonises. We model running cost from your actual consumption at current and forecast prices, share the full model, and invite you to stress-test it. We would rather lose a job to honest maths than win it on a number we cannot stand behind.

How businesses pay for it

Most commercial heat pump projects are funded through a mix of capital purchase, tax relief, grants and finance. For limited companies, full expensing gives a 100% first-year deduction on qualifying plant and machinery with no upper cap, made permanent from April 2026, worth up to 25p of tax saved per pound spent at the 25% corporation-tax rate. Heat pumps qualify. Sole traders and partnerships use the Annual Investment Allowance instead. On top of that, public bodies can access the Public Sector Decarbonisation Scheme, eligible industrial sites the Industrial Energy Transformation Fund, and multi-building schemes the Green Heat Network Fund. The £7,500 Boiler Upgrade Scheme is domestic-only and does not apply to commercial premises, a point worth being clear about up front. Our grants and funding guide maps which routes your organisation qualifies for. You can read the official position on full expensing and the Annual Investment Allowance in the government's capital allowances guidance.

Payback and how we measure it

Simple payback, dividing the net cost by the annual saving, is the figure most buyers ask for, and the cards below quote it by technology. It is useful shorthand but it ignores the time value of money and the rising cost of carbon, so for a real investment decision we also model the internal rate of return and net present value over the system's service life. Payback typically lands between seven and eleven years depending on technology, with hybrid retrofits at the faster end and ground-source slower but longer-lived. Where a grant covers a large share of the capital, as with PSDS-funded public-sector schemes, conventional payback becomes less relevant than the carbon and resilience outcome.

When you are ready, the next step is a heat-loss survey and a review of your consumption data, after which we can put real figures against your building. Start with a free quote and we will tell you honestly whether a heat pump stacks up for your site.