Boiler Upgrade Scheme Explained: Eligibility, Grant Amounts and How to Apply

Replacing a fossil fuel heating system is a significant investment, and for many homeowners the upfront cost is the single biggest barrier to making the switch. The Boiler Upgrade Scheme exists specifically to address that, offering government-backed grants that reduce the cost of installing a heat pump for eligible properties across England and Wales.

This guide explains what the scheme covers, how much funding is currently available, whether your home qualifies, and what the application process actually looks like from a homeowner's perspective.

What is the Boiler Upgrade Scheme?

The Boiler Upgrade Scheme is a government grant programme in England and Wales designed to encourage homeowners to replace oil, gas, or LPG heating systems with low-carbon alternatives, primarily heat pumps. It was introduced to support the UK's broader commitment to reducing carbon emissions from the built environment and to make the transition away from fossil fuel heating more financially accessible.

The scheme is administered by Ofgem and funded by the Department for Energy Security and Net Zero. Grants are available on a first-come basis within each financial year, and the scheme has been extended and expanded several times since its launch in 2022, reflecting strong demand and government commitment to keeping it running.

Unlike some energy schemes that involve lengthy applications or income assessments, the boiler replacement scheme is relatively straightforward. The grant is claimed by your MCS-accredited installer after a successful installation, which means the homeowner benefits from a reduced net cost without having to navigate a separate application process independently.

How much is the Boiler Upgrade Scheme grant?

The government heat pump grant currently available through the scheme varies depending on the technology being installed.

For homeowners currently on oil or LPG heating, there is an important additional consideration. From 21 July 2026 to 31 March 2027, eligible off-gas-grid properties heated by oil or LPG may qualify for an increased heat pump grant UK of £9,000 for air-to-water and ground source heat pumps.

This represents the highest grant level the scheme has offered to date, and for oil-heated homes in Essex currently weighing up the switch, the timing is particularly favourable for homeowners considering making the switch.

The grant is applied directly to the installation cost rather than paid out separately, so the figure you see quoted by your installer will already reflect the grant reduction where applicable.

Boiler Upgrade Scheme eligibility: who qualifies?

Boiler upgrade scheme eligibility is determined by a combination of property, system, and installer criteria. Understanding each one upfront avoids surprises further down the line.

Property criteria:

• The property must be located in England or Wales
• It must be a residential building or a small non-domestic property such as a park home
• The property must have a valid Energy Performance Certificate (EPC) with no outstanding recommendations for loft insulation or cavity wall insulation that have not been completed
• Properties that have already received a grant through the scheme or its predecessor (the Renewable Heat Incentive) are generally not eligible for a second claim

Heating system criteria:

• The existing system being replaced must be a fossil fuel boiler or heating system, including oil, gas, and LPG
• The new system must be a qualifying low-carbon technology: air source heat pump, ground source heat pump, biomass boiler, or air-to-air heat pump

Installer criteria:

• The installation must be carried out by an MCS-accredited installer
• Simcott Renewables holds MCS accreditation, which means we are fully authorised to install qualifying systems and submit BUS grant heat pump applications on behalf of our customers

If your property does not currently have an EPC, or if your existing EPC flags outstanding insulation recommendations, this needs to be addressed before an application can proceed. In practice, this is often simpler than it sounds, and your installer can advise on the quickest route to getting this in order before the installation is booked.

Is there a higher grant available for oil-heated homes?

Yes, and this is worth highlighting clearly for anyone in Essex currently running on oil heating.

The standard oil boiler grant UK through the Boiler Upgrade Scheme is £7,500 for an air-to-water heat pump. However, the enhanced grant of £9,000 available from 21 July 2026 to 31 March 2027 specifically targets off-gas-grid properties on oil or LPG, which covers a significant proportion of rural and semi-rural homes across Essex and the East of England.

For a homeowner in this situation, the £9,000 grant makes oil boiler replacement considerably more financially accessible than it has been at any previous point in the scheme's history. Combined with the long-term running cost savings from switching away from oil, the financial case for acting within this window is strong.

The enhanced grant is subject to the same eligibility criteria as the standard grant, and it applies only while the current scheme period runs. To find out whether your property qualifies under the enhanced rate, speak to the Simcott Renewables team directly and we can confirm your eligibility as part of the initial conversation.

How does the Boiler Upgrade Scheme application work?

One of the most practical advantages of the boiler upgrade scheme is that the application burden sits almost entirely with the installer rather than the homeowner. Here is how the process works in practice.

Step 1: Initial survey

Your installer visits the property, assesses the heating requirements, and confirms whether the property and system meet boiler upgrade scheme eligibility criteria. This is the point at which any EPC or insulation issues are identified and a plan is put in place to resolve them where needed.

Step 2: Installation

Once everything is confirmed, the installation proceeds. The MCS-accredited installer carries out the full heat pump installation to the scheme's technical standards.

Step 3: Grant application

After a successful installation, the installer submits the grant application to Ofgem on your behalf. The grant amount is deducted from your final invoice rather than paid to you separately, so the reduced cost is immediate rather than something you claim back afterwards.

Step 4: Confirmation

Ofgem processes the application and issues confirmation. Your installer handles any follow-up queries from Ofgem directly.

For homeowners, the practical experience is straightforward: you pay the net cost after the grant, and the paperwork is managed by the installation team.

What about the Warm Homes Plan?

Alongside the boiler replacement scheme, the Warm Homes Plan is an additional government funding route worth being aware of. The plan is designed to support lower-income households and those in less energy-efficient properties with the cost of home energy upgrades, which may include heat pump installations in some cases.

The scheme is still developing in terms of its detailed eligibility criteria and rollout timeline, so it is worth exploring as a supplementary option rather than a direct alternative to the Boiler Upgrade Scheme. You can find out more about all available funding and finance options on our dedicated page, and we are happy to talk through which routes may apply to your situation when you get in touch.

Getting the Boiler Upgrade Scheme in Essex

For homeowners in Essex, the combination of boiler upgrade scheme Essex availability and Simcott Renewables' local MCS-accredited installation service means the process from initial enquiry to completed installation can move quickly and with minimal complication on your side.

We work with homeowners across the county, including Colchester, Chelmsford, and the surrounding areas, and handle the full process from heat loss survey and system design through to grant application and commissioning.

Off-gas-grid properties on oil heating are among the strongest candidates for the current enhanced grant, and we can confirm eligibility and provide a full quote typically within a short turnaround from the initial survey.

Frequently asked questions

Does the Boiler Upgrade Scheme cover the full cost of installation?

No, it is a contribution toward the cost rather than full funding. The grant of £7,500 or £9,000 reduces the overall installation cost, and the homeowner covers the remainder. The net cost after the grant varies depending on property size, system specification, and any preparation work required. Get in touch with Simcott Renewables for a full quote that reflects the grant deduction for your property.

Can I apply for the Boiler Upgrade Scheme myself?

No. The application must be submitted by an MCS-accredited installer on your behalf. As an MCS-accredited installer, Simcott Renewables manages this process as a standard part of every eligible installation.

What if my EPC has outstanding recommendations?

Outstanding recommendations for loft or cavity wall insulation need to be addressed before a grant application can proceed. In many cases this is straightforward and can be arranged before the heat pump installation is booked. Your installer will flag this during the initial survey if it applies.

Is the Boiler Upgrade Scheme available in Scotland?

No. The UK boiler upgrade scheme as administered by Ofgem covers England and Wales only. Scotland has its own separate home energy support schemes, which operate under different eligibility criteria.

How long does Boiler Upgrade Scheme approval take?

Ofgem typically processes applications within a few weeks of submission. Your installer handles the submission and any follow-up, so there is nothing further required from you once the installation is complete.

Can I get the grant if I already have solar panels?

Yes. Having solar panels installed does not affect your eligibility for the government boiler replacement scheme. In fact, combining solar with a heat pump is an increasingly popular approach for homeowners looking to further offset the running costs of the heat pump with self-generated electricity.

Is there a deadline for the Boiler Upgrade Scheme?

The Boiler Upgrade Scheme continues beyond the current enhanced grant window. What is confirmed is that the £9,000 uplift for off-gas-grid oil and LPG properties runs until 31 March 2027. The standard scheme continues after that date, though end dates and grant levels are subject to government announcements and can change. We recommend checking the latest GOV.UK guidance or speaking to Simcott Renewables for the most current position before making a decision based on timing.

Ready to check your eligibility?

The boiler upgrade scheme 2026 window, particularly the enhanced £9,000 grant for oil-heated homes, represents a genuine opportunity for homeowners who have been considering the switch but waiting for the right moment.

Simcott Renewables carries out heat pump installation across Essex as an MCS-accredited installer, handling everything from the initial survey and eligibility check through to grant application and system commissioning. Whether you are currently on oil, gas, or LPG, we can confirm quickly whether you qualify and what the net cost looks like for your property.

Visit our oil boiler replacement page for more on the replacement process, explore heat pump installation options to understand the technology, or get in touch with Simcott Renewables to arrange a no-obligation survey and eligibility check.