The typical cost of a full air source heat pump installation in Scotland — supply and fit included — sits at around £15,000 for most properties.
After the Home Energy Scotland grant of up to £7,500, and an interest-free loan covering the remainder, the majority of Scottish homeowners pay absolutely nothing on the day of your air source heat pump installation. For rural and off-grid properties, a £9,000 grant reduces the loan required even further.
Here’s the full heat pump cost breakdown for Scotland to help you decide on if they are right for you price-wise.
What Does a Heat Pump Installation Cost in Scotland?
All figures below cover the complete supply and fit cost — the heat pump unit, hot water cylinder, installation labour, and commissioning. Not just the unit off a shelf.
| Property Size | System Output | Estimated Supply & Fit Cost |
| 1–2 bedroom flat or house | 5–8 kW | £8,000 – £11,000 |
| 3–4 bedroom house | 8–12 kW | £11,000 – £15,000 |
| 5+ bedroom / larger home | 16 kW+ | £15,000 – £18,000 |
Our average installation at The Edinburgh Boiler Company comes in at around £15,000 — broadly in line with the Energy Saving Trust’s UK average figure of £12,500 to £15,000 for a typical supply and fit. We’re the number one air source heat pump installation company in Scotland, and this is what matters most to ensure your heat pump lasts as long as possible.
Costs vary depending on system size, property type, and what — if anything — needs upgrading to make the system perform at its best. Read more about our air source heat pump installation service or get in touch for a fre quote today.
How Does That Compare to a Boiler Replacement?
A heat pump costs more upfront than a boiler replacement. We won’t dress that up. But the comparison looks very different once grants are applied and the longer system lifespan is factored in.
| Heating System | Typical Install Cost | Approx. Lifespan | Est. Cost Per Year of Ownership |
| Air source heat pump (before grant) | £8,000 – £18,000 | 20–25 years | £320 – £900 |
| Air source heat pump (after £7,500 grant) | £500 – £10,500 | 20–25 years | £20 – £525 |
| Gas boiler replacement | £1,500 – £3,500 | 10–15 years | £100 – £350 |
| Oil boiler replacement | £2,000 – £5,000 | 10–15 years | £133 – £500 |
| LPG boiler replacement | £2,000 – £4,500 | 10–15 years | £133 – £450 |
When the cost is spread over the life of the system, a properly grant-funded heat pump is often cheaper per year than a replacement boiler — before any reduction in energy bills is even considered.
What Can Add to the Final Price of a Heat Pump Installation?
No two installations cost exactly the same. These are the most common variables:
Radiator upgrades — heat pumps operate at lower flow temperatures than gas boilers, so older or undersized radiators sometimes need replacing to deliver sufficient heat. Not every home needs this, but it can add between £500 and £3,000 depending on how many rooms are affected. We assess this as part of every survey so there are no surprises.
Hot water cylinder — if you don’t already have a suitable cylinder, a new one is required. This is included in most of our quotes but worth confirming with any installer before signing off.
Pipework modifications — older Scottish properties occasionally need pipework changes, particularly when moving away from a back boiler or gravity-fed system.
Insulation improvements — if your home needs insulation work to perform well with a heat pump, this can be claimed as a separate grant through Home Energy Scotland — up to £7,500 specifically for energy efficiency improvements — applied for at the same time as the heat pump grant.
Underfloor heating — if installed alongside the heat pump, this adds to the overall project cost but is an excellent long-term pairing for efficiency and comfort.
Access and location — remote or island properties may carry a small additional logistics cost depending on the installer.
Read more – What is a heat pump?
What Grants Are Available for Heat Pumps in Scotland?
This is where Scotland genuinely stands apart. Scottish homeowners do not have access to the Boiler Upgrade Scheme — that applies to England and Wales only. Instead, the Home Energy Scotland Grant and Loan is available, and it’s considerably more generous.
Standard Scottish properties:
- Up to £7,500 cashback grant — non-repayable, it’s yours to keep
- Up to £7,500 interest-free loan — repaid over 10 years at around £62.50 per month
- Total support of up to £15,000
Rural, island, and off-grid properties:
Homes not connected to the mains gas grid — which covers a significant proportion of rural Scotland — qualify for the rural uplift:
- Up to £9,000 cashback grant — again, non-repayable
- Up to £7,500 interest-free loan — repaid over 10 years at around £62.50 per month
- Total support of up to £16,500
The grant is applied for before installation begins and paid as cashback once the work is complete. The interest-free loan covers whatever remains, repaid gradually over ten years with no interest added whatsoever — you pay back exactly what you borrowed, nothing more.
At The Edinburgh Boiler Company we maximise this funding for every single customer. We handle the entire application process from start to finish, making sure the full amount available to you is secured before anything is ordered or installed.
What Will You Actually Pay After Grants?
Based on our average installation cost of £15,000, here is exactly what the numbers look like once the full grant and loan package is applied:
| Scenario | Install Cost | Grant | Loan Required | Monthly Repayment | Upfront Cost to You |
| Standard Scottish home | £15,000 | £7,500 | £7,500 | ~£62.50/month | £0 |
| Rural / off-grid home | £15,000 | £9,000 | £6,000 | ~£50/month | £0 |
In both cases, you pay nothing on the day the system is installed. The grant covers the first portion outright, and the interest-free loan covers the rest — spread over ten years at a monthly cost that most households find very manageable.
To put it in perspective, £62.50 a month is less than most households pay for a boiler service plan or a broadband contract.
For homeowners who also need insulation improvements, claiming the separate Home Energy Scotland energy efficiency grant of up to £7,500 at the same time means total support across both measures can reach up to £22,500 — covering both the heat pump installation and the insulation works in full for many properties.
Get an Accurate Quote for Your Home
A table can only take you so far. The only reliable way to know exactly what your installation will cost — and exactly how much grant funding you’re entitled to — is a proper home survey.
At The Edinburgh Boiler Company we carry out full heat loss surveys, check your existing system and radiators, confirm your grant eligibility, and provide a detailed, transparent quote with no hidden costs. We’re Scotland’s number one rated heat pump installer, and we’ll give you a straight answer before any commitment is made. Book your free survey today or find out more about our heat pump installation service.
