TL;DR: The “stacking hack” involves strategically combining the national Boiler Upgrade Scheme (BUS) with local council grants to fund different elements of a home energy retrofit. While you cannot usually use two grants for the same specific installation, you can often use them sequentially to cover insulation and heating upgrades, though your property may be at risk if repayments on any associated financing are not made.

The “Stacking Hack”: How to Combine BUS with Local Council Incentives

As energy prices remain a significant concern for UK households, many property owners are looking for ways to transition to renewable energy without bearing the full brunt of the upfront costs. The government’s Boiler Upgrade Scheme (BUS) has been a primary driver for this shift, but it is often not enough to cover the entire expense of a deep-home retrofit. This has led to the emergence of what some call the “stacking hack”: how to combine BUS with local council incentives to maximise financial support.

Understanding how these different funding streams interact is essential for anyone looking to upgrade their property. By using a “fabric first” approach and layering different types of support, homeowners can significantly reduce the capital required to make their homes greener and more efficient.

What is the Boiler Upgrade Scheme (BUS)?

The Boiler Upgrade Scheme is a UK government initiative designed to encourage property owners to replace fossil fuel heating systems with low-carbon alternatives. Currently, the scheme provides a fixed grant of £7,500 towards the cost of an air source heat pump or a ground source heat pump. It also offers £5,000 towards biomass boilers in specific rural circumstances.

The grant is applied for by the installer on behalf of the homeowner, and the value is deducted directly from the final quote. This makes the scheme relatively simple to access, but it only covers the heating appliance itself. It does not typically cover the cost of the necessary energy efficiency improvements, such as loft insulation or double glazing, which are often required to make a heat pump work effectively.

Identifying Local Council Incentives

Local authorities across the UK often have their own pots of funding to help residents improve their Energy Performance Certificate (EPC) ratings. These incentives are usually funded by central government but administered locally. Common schemes include:

• The Home Upgrade Grant (HUG2): This is specifically for homes that are not connected to the gas grid. It provides funding for energy efficiency upgrades and low-carbon heating.
• ECO4 (Energy Company Obligation): While delivered by energy suppliers, local authorities can identify eligible households through “Local Authority Flexibility” (LA Flex) rules. This scheme focuses on low-income and vulnerable households.
• LAD (Local Authority Delivery): This scheme aims to improve the energy efficiency of low-income households with a focus on EPC ratings of D, E, F, or G.

Each council may have different criteria, and some may even offer “top-up” grants or interest-free loans for residents in specific postcodes or conservation areas.

The Stacking Hack: How to Combine BUS with Local Council Incentives

The core of the “stacking hack” is understanding the rules regarding “double funding.” Generally, you cannot receive two different public grants for the exact same measure. For example, you cannot use the BUS grant and a local council grant to pay for the same heat pump unit. However, you can often stack them by using different schemes for different parts of the project.

A successful stacking strategy typically follows these steps:

1. The Fabric First Phase

Most heat pumps require a well-insulated home to operate efficiently. You may find that your local council offers grants via the HUG2 or ECO4 schemes specifically for “fabric” measures like cavity wall insulation, loft insulation, or floor insulation. By using local incentives to upgrade the fabric of your home first, you reduce the heat demand of the property.

2. The Heating Upgrade Phase

Once the insulation is installed via local funding, you can then apply for the Boiler Upgrade Scheme to install the heat pump. Because your home is now better insulated, you may be able to install a smaller, less expensive heat pump unit, making the £7,500 BUS grant go much further.

3. Checking for Local Top-Ups

In some rare cases, local authorities have specific “gap-funding” pots. These are designed to cover the remaining balance of a heat pump installation after the BUS grant has been applied. It is always worth contacting your local council’s energy officer to see if such a scheme exists in your area, as these are often not widely advertised.

To ensure you are eligible for any of these schemes, you may need to undergo a credit check if you are also applying for financing to cover the shortfall. Get your free credit search here. It’s free for 30 days and costs £14.99 per month thereafter if you don’t cancel it. You can cancel at anytime. (Ad)

Financing the Remaining Balance

Even with the stacking hack, a comprehensive home upgrade can be expensive. Many homeowners find they still have a “funding gap” to bridge. This is where professional financial services become vital. Depending on your circumstances, you might consider a green mortgage, a secured loan, or even a bridging loan if you are renovating a property for resale.

When considering bridging loans, it is important to understand the structure. Most bridging loans are “closed” (with a fixed repayment date) or “open” (with no fixed date but a clear exit strategy). Unlike traditional mortgages, interest on bridging loans is typically “rolled up,” meaning you do not make monthly payments; instead, the total interest is paid at the end of the term. This can help with cash flow during a renovation project.

Your property may be at risk if repayments are not made. If you default on a secured loan or bridging loan, the lender may take legal action to repossess your property. Furthermore, defaults can lead to increased interest rates and additional charges that can significantly increase the total cost of the debt.

Eligibility and Compliance

To successfully execute the stacking hack, you must ensure you meet the eligibility criteria for each individual scheme. For the Boiler Upgrade Scheme, you must own the property and be replacing an existing fossil fuel system. You can check the full criteria on the official GOV.UK Boiler Upgrade Scheme page.

For local council incentives, eligibility is often tied to household income, the current EPC rating of the property, or whether the home is off the gas grid. It is vital to get written confirmation from the grant providers that your plan to use multiple funding sources does not violate their “no double funding” clauses.

Potential Risks and Considerations

While the stacking hack is a powerful way to reduce costs, it is not without potential complications. Managing multiple contractors and grant applications can be time-consuming. There is also the risk that one grant is approved while another is rejected, leaving you with a financial shortfall.

• Timing: Some grants must be applied for before work begins. If you start the insulation work before getting approval for the local grant, you may lose that funding.
• Voucher Expiry: BUS vouchers have an expiry date (typically three months for air source heat pumps). You must ensure your installer can complete the work within this timeframe.
• Contractor Accreditation: Most schemes require the use of MCS-certified installers. Using a non-accredited contractor will likely invalidate your grant applications.

People also asked

Can I use the Boiler Upgrade Scheme and ECO4 together?

Generally, you cannot use both for the same measure (e.g., the same heat pump). However, you may be able to use ECO4 for insulation and the BUS for the heat pump, provided the ECO4 provider agrees to this split.

Do I have to pay back the Boiler Upgrade Scheme grant?

No, the BUS grant is not a loan and does not need to be repaid, provided you comply with the scheme’s terms and the installation is completed by an MCS-certified professional.

Is the Boiler Upgrade Scheme available in Scotland?

The BUS applies to England and Wales; Scotland has its own scheme called Home Energy Scotland, which offers a combination of grants and interest-free loans for similar purposes.

What happens if the heat pump costs more than the £7,500 grant?

The homeowner is responsible for paying the difference. This can be done through personal savings or various financing options like green mortgages or secured personal loans.

Does a heat pump increase my property value?

While it may make the property more attractive to environmentally conscious buyers and improve the EPC rating, value increases are not certain and depend on the wider property market and the quality of the installation.

Conclusion

The “stacking hack” is a strategic approach that requires careful planning and a thorough understanding of both national and local policy. By combining the £7,500 Boiler Upgrade Scheme grant with local authority incentives like HUG2 or ECO4, UK homeowners can make substantial improvements to their property’s efficiency while minimising out-of-pocket expenses.

However, because these projects often involve significant financial commitments and complex grant rules, it is essential to seek professional advice. Ensure that your property meets the necessary insulation standards before installing a heat pump, and always verify that your chosen installers are appropriately accredited. With the right strategy, you could transform your home into a low-carbon, energy-efficient property that is fit for the future.