Heat Pump Installation Pricing Guide: How to Quote Air Source and Ground Source Heat Pumps (2026)

Heat pump installations are one of the most complex jobs a heating engineer can quote. Between MCS certification requirements, the Boiler Upgrade Scheme grant administration, variable system sizing and the need for radiator assessment, there are more variables than a straight boiler swap. Get the pricing right and heat pumps are among the highest-value jobs available to a UK heating business. Get it wrong and you will spend three days on site for a margin that barely covers your costs.

MCS Certification: The Entry Requirement

To install heat pumps legally and allow your customers to claim the Boiler Upgrade Scheme grant, you must be MCS (Microgeneration Certification Scheme) certified. MCS certification requires registration with an approved scheme provider (such as NAPIT or HIES), a technical assessment of your installation competency and ongoing quality audits. Costs typically run £800–£2,500 for initial registration depending on the scheme provider and your business size. MCS certification must be maintained through annual audits — factor this into your overhead calculation alongside your Gas Safe registration.

ASHP vs GSHP: Different Products, Different Markets

Air Source Heat Pumps (ASHP) extract heat from outdoor air and are suitable for most UK properties with adequate outdoor space for the unit. They dominate the residential retrofit market because installation is straightforward — no groundworks required — and the equipment cost is lower. Ground Source Heat Pumps (GSHP) extract heat from the ground via either a borehole (vertical) or a horizontal collector array buried in the garden. GSHP systems deliver higher efficiency (higher Coefficient of Performance) but require significantly more disruption and cost. Most domestic heat pump enquiries will be for ASHP; GSHP tends to be specified for larger rural properties or new-build developments where the ground collector can be laid during groundworks.

The BUS Grant: £7,500 Off the Customer's Price

The Boiler Upgrade Scheme (BUS) grant, increased to £7,500 from April 2025, is deducted from the customer's invoice at point of sale — you claim it back from OFGEM after installation. This means you quote the full gross price, deduct the grant on the invoice, receive the customer's net payment, then reclaim the grant from OFGEM typically within 30 days. You must be MCS certified to participate. The grant applies to ASHP and GSHP installations in England and Wales on properties with a valid EPC (Energy Performance Certificate) at EPC rating D or above (or properties that have a specific exemption).

The BUS grant administration process requires you to submit an application through the MCS portal before installation, attach the MCS certificate after commissioning and then submit the OFGEM claim. Budget 2–4 hours per installation for grant administration. Some installers charge a grant administration fee of £150–£250; others absorb this into their labour pricing. Either approach is legitimate — just make sure it's reflected somewhere in your margin.

ASHP System Sizing

Correct sizing is critical for heat pump performance and customer satisfaction. An undersized system will struggle in cold snaps; an oversized system will cycle inefficiently and waste energy. Sizing should be calculated using a MCS-compliant heat loss calculation (MCS HDD or SAP methodology). As a rough guide: an 8kW ASHP suits a well-insulated 2–3 bedroom semi-detached; a 12kW unit suits a 3–4 bedroom detached; a 16kW unit suits a larger 4–5 bedroom property or a poorly insulated mid-terrace. Always base your sizing on a proper heat loss calculation, not rules of thumb — MCS compliance requires it and it protects you from callback disputes.

ASHP Installed Pricing

Installed ASHP prices vary significantly based on brand, system complexity and ancillary requirements. As a market benchmark: an 8kW ASHP system installed (including the heat pump unit, a hot water cylinder, pipework and commissioning) runs £8,000–£12,000 gross before the BUS grant. After the £7,500 grant, the customer pays £500–£4,500. A 12kW system runs £10,000–£15,000 gross (£2,500–£7,500 after grant). A 16kW system runs £12,000–£18,000 gross (£4,500–£10,500 after grant).

These ranges reflect brand variation (Samsung, Daikin, Vaillant, Worcester Bosch and Mitsubishi Electric are the dominant UK residential brands at different price points), installer margin and regional labour rate differences. If your local market is London or the South East, your labour element will be at the top of or above these ranges.

GSHP Borehole vs Horizontal Pricing

GSHP installations are priced on survey because groundworks costs vary so significantly. A borehole installation (where a specialist drilling contractor sinks one or more 80–150 metre boreholes) adds £8,000–£20,000 to the installation cost before the heat pump itself. Horizontal collector arrays (where collector pipes are laid in shallow trenches across a large garden area) add £3,000–£8,000 for groundworks. Total installed GSHP costs typically run £14,000–£30,000+ depending on system size and ground collector type. The BUS grant applies equally to GSHP installations.

Buffer Tanks and Hot Water Cylinders

Most ASHP installations require a hot water cylinder (heat pumps cannot deliver instant hot water like a combi boiler) and some also require a buffer tank. A 200–250 litre unvented cylinder costs £600–£1,200 supplied; a 300 litre cylinder £900–£1,500. A buffer tank (typically 50–200 litres) adds £250–£600 for the vessel. Installation of both adds 4–8 hours of pipework time. Always include cylinder and buffer tank as line items in your quote — they are a common source of “why is it so expensive?” questions if customers are surprised by them.

Underfloor Heating Compatibility and Radiator Assessment

Heat pumps operate most efficiently with low-temperature heat distribution — typically 35–45°C flow temperature, versus the 60–70°C of a gas boiler. Underfloor heating (UFH) is ideal for heat pump systems and requires no modification. Existing radiators, however, may need to be upsized if they were sized for high-temperature gas operation. A radiator assessment must be included in your pre-installation survey: calculate the heat output of each existing radiator at the intended heat pump flow temperature and identify any that need replacing. Radiator upgrades add £100–£250 per radiator (supply and fit) — a common additional cost that customers need to understand before they sign.

MCS Certificate and SAP Assessment

After commissioning, you must generate an MCS Commissioning Certificate through the MCS portal and provide it to the customer. This is also required for the BUS grant claim. Some properties will also require a SAP (Standard Assessment Procedure) assessment update — particularly if the heat pump is being installed as part of a wider retrofit programme or if the EPC needs updating for grant eligibility. SAP assessments cost £150–£300 and are carried out by an accredited energy assessor. Clarify who is responsible for the SAP assessment in your quote — it is not always the installer's responsibility, but customers often assume it is included.

Marketing Heat Pump Installations

The strongest heat pump prospects are homeowners actively considering replacing an ageing gas boiler, particularly those in EPC D-rated properties who are already thinking about energy efficiency improvements. Google search campaigns targeting “air source heat pump installation [city]” and “heat pump grant UK” capture high-intent prospects. Facebook and Instagram campaigns targeting homeowners aged 35–65 in your service area with messaging around the BUS grant and long-term energy savings work well for awareness. EPC D-rated property lists (available through data brokers) allow direct mail campaigns to exactly the target demographic — properties likely to benefit and eligible for the grant.

Managing Heat Pump Jobs with Trade2Base

Trade2Base stores MCS certificates and commissioning documentation directly against each job, making the BUS grant claim process faster and audit-proof. Multi-day heat pump installations can be scheduled across the calendar with engineer allocation at each stage, so nothing is missed. Quote templates for ASHP and GSHP installations save significant time on each new enquiry, and digital sign-off means customers can approve their quote from their phone before you start work. Campaign attribution shows which Google Ads campaign or Facebook ad generated each enquiry, so you know exactly where to invest your marketing budget for the best return.