There is a moment in every grant change where the market gets loud. Customers hear the headline. Sales teams see a reason to re-open quotes. Competitors start posting quick graphics. Then the office has to make the actual job fit the actual scheme.
The £9,000 BUS uplift is one of those moments. It is useful, timely and commercially strong. But for installers, the serious work is not the headline. It is the evidence behind the quote.
What is confirmed
GOV.UK announced on 26 June 2026 that households on heating oil across England and Wales would be eligible for £9,000 off a heat pump, with the grant increasing from £7,500 from 21 July 2026.
The GOV.UK approved grant values notice, updated on 9 June 2026, sets out the categories effective from 21 July 2026. The £9,000 value appears for eligible off-gas grid properties replacing oil or liquefied petroleum gas with an air-to-water heat pump or ground source heat pump.
Ofgem’s BUS page says the scheme is installer-led, with MCS-certified installers applying for and redeeming vouchers on behalf of property owners. Ofgem also lists the £9,000 off-gas grid value as available from 21 July 2026 until 31 March 2027.
| Route | Current public value | Installer note |
|---|---|---|
| Air-to-water heat pump | £7,500 standard, or £9,000 for eligible off-gas grid oil/LPG replacements | Check existing fuel and off-gas grid status before quoting. |
| Ground source heat pump | £7,500 standard, or £9,000 for eligible off-gas grid oil/LPG replacements | Do not assume the uplift applies to every GSHP enquiry. |
| Air-to-air heat pump | £2,500 for eligible residential properties | This is not the £9,000 route. |
| Biomass boiler | £5,000 | Separate technology route and not the focus of this article. |
Why this is not just a grant story
The homes this uplift is aimed at are often the jobs that need the cleanest survey pack. Oil and LPG properties are more likely to be rural, off-gas grid and varied in layout. The existing system can be older. Plant rooms can be awkward. Cylinders, pipework, emitters and electrics can change the quote quickly.
That is why the right installer response is not “we can knock £9,000 off.” The better response is: “we need to confirm the property, the existing fuel, the proposed technology and the site evidence before we rely on that value.”
The timing also lands as energy costs are noisy again. Ofgem’s July to September 2026 price cap page shows average direct debit electricity at 26.11p/kWh and gas at 7.33p/kWh. Customers are paying attention, and they will ask sharper questions about running cost, heat loss, insulation, emitters and whether the quote is complete.
The six checks before quoting
Before the £9,000 deduction appears on a proposal, the job should pass six checks.
- Existing fuel: capture evidence that the home is currently heated by oil or LPG, not just a customer note in a CRM.
- Off-gas grid position: confirm the property fits the off-gas grid wording being used for the uplift.
- Technology route: confirm whether the proposal is air-to-water, ground source, air-to-air or another route. The grant value changes.
- Application timing: check whether the application will be properly made on or after the relevant date.
- EPC or alternative evidence: check the current Ofgem guidance position before assuming an old EPC rule still applies.
- Survey pack quality: make sure the report captures the quote-changing details before the customer treats the price as fixed.
What the survey needs to capture
A grant can reduce the upfront cost. It cannot fix a weak site record. For oil and LPG replacements, the survey should give the office and designer enough evidence to avoid a second visit or a painful post-quote correction.
Oil or LPG proof
Boiler, tank or LPG storage evidence, plant photos, customer notes, location context and any hybrid or secondary heat source should be recorded clearly.
Room-by-room sizing evidence
Room measurements, glazing, fabric assumptions, emitters and ventilation context decide whether the heat pump design is realistic.
Outdoor unit and sound inputs
Boundaries, assessment positions, access, base location, airflow, MCS 020(a) inputs where in scope and service space all matter.
Supply and consumer-unit context
Meter, cut-out, consumer unit, spare ways, likely cable route and obvious upgrade risks should be in the report before quote sign-off.
EPC and properly made applications
Ofgem’s installer guidance page says version 5.1 is the current installer guidance. It applies to applications properly made on or after 28 April 2026, with updated uplift guidance applying to applications properly made on or after 21 July 2026.
Ofgem’s property-owner guidance says the same thing in customer-facing language: a voucher application is only considered properly made once Ofgem has the information needed to assess eligibility, with consent and identity verification provided.
That matters because an installer can do a brilliant survey and still get into trouble if the quote implies the higher value is guaranteed before the application timing and evidence route are clear.
MCS and consumer code position
MCS has also confirmed a separate but relevant point: DESNZ has recognised the redeveloped MCS Installer Scheme as a Code of Practice for BUS. Installers operating under the redeveloped scheme are no longer required to hold separate RECC or HIES membership for BUS work.
The important qualifier is “operating under the redeveloped scheme.” Installers that have not transitioned still need to follow their current certification requirements. For office teams, that means the compliance check should sit next to the grant check, not after it.
Customer wording that avoids trouble
The words used at quote stage matter. A safer approach is to separate the estimate from the confirmed voucher position.
“This estimate assumes the property qualifies for the £9,000 Boiler Upgrade Scheme oil/LPG uplift from 21 July 2026. Final grant value depends on BUS eligibility, application timing, technology route, Ofgem checks and the evidence required at voucher stage.”
That is less punchy than a sales graphic. It is also much harder to misunderstand.
What Vertex would check first
If an installer asked us where to start, we would not start with the grant. We would start with the property record.
- Is the current heating fuel definitely oil or LPG?
- Is the property off-gas grid?
- Is the proposed heat pump route the one that matches the higher grant category?
- Are plant, cylinder, emitters, electrics and siting captured clearly?
- Can the designer trust the heat loss evidence?
- Can the customer see what is included, what is assumed and what still needs checking?
The grant makes the conversation easier. The survey makes the quote safer.
For the practical survey route, use our heat pump survey page, ASHP survey page and heat loss survey page. For the earlier tracking article, see the BUS £9,000 oil and LPG grant update.
Sources checked
- GOV.UK: Thousands of homes will be eligible for £9,000 off a heat pump
- GOV.UK: approved BUS grant categories and values from 21 July 2026
- Ofgem: Boiler Upgrade Scheme overview
- Ofgem: Boiler Upgrade Scheme guidance for installers
- Ofgem: Boiler Upgrade Scheme guidance for property owners
- MCS: DESNZ recognises redeveloped MCS as a Code of Practice for BUS
- Ofgem: July to September 2026 energy price cap unit rates