Energy Efficiency Grants for BTL Landlords

Most landlords leave free money on the table. If your tenant is on benefits in a cold, leaky house, there is a good chance the government or an energy company will pay for at least some of the upgrade, if you know which scheme to use.

1. ECO4 - the big one for low-income, D-G rated rentals

What ECO4 is

Energy Company Obligation 4 (ECO4) is a GB-wide scheme that forces the big suppliers to fund energy efficiency upgrades in the least efficient homes, with a strong focus on low-income households and EPC D-G properties.

• Runs from 1 April 2022 to 31 December 2026.
• Works on a whole-house retrofit model, not one-off gadgets.

What ECO4 can fund (varies case by case):

• Cavity wall, internal and external wall insulation.
• Loft and roof insulation.
• Underfloor insulation where suitable.
• Heating system upgrades (new efficient boiler, first-time central heating, in some cases heat pumps) and some renewables such as solar PV.

Eligibility - landlord angle

Your rental can qualify if:

• EPC is D, E, F or G (the scheme targets the worst stock).
• The household is in the "Help to Heat Group" (on certain means-tested benefits) or qualifies under ECO4 Flex via the council (low income, fuel poverty, health risk from cold).
• You give written consent for the works.

Crucially: it is your tenant's circumstances (benefits / income) that unlock ECO4 in most cases, not your own income. Many landlords do qualify indirectly because their tenants are on Universal Credit, Pension Credit etc.

Who pays and how to apply

• The obligated energy supplier pays for the measures.
• In many jobs the landlord pays nothing, though sometimes you are asked for a contribution if the measure is expensive relative to deemed savings.

Process:

1. Check your EPC is D-G (if there is no EPC, get one done).
2. Speak to your tenant about their benefits / income.
3. Contact a retrofit/energy firm or go via the big suppliers' ECO4 pages.
4. Complete an eligibility check (often online or by phone) and sign consent forms.
5. An assessor surveys the property and proposes a package of measures.
6. Works are installed while tenanted, with your consent and coordination.

Timeline

Assessment to install is usually a few weeks to a few months depending on installer backlog and measure type. ECO4 is due to run until 31 December 2026, but funding pots and installer capacity can run out earlier in popular areas.

Many landlords on forums genuinely do not realise: if your tenant is on means-tested benefits and your EPC is E, you may be able to get loft and wall insulation and sometimes heating upgrades for little or no cost.

2. Boiler Upgrade Scheme (BUS) - GBP 7,500 for heat pumps

What it is

The Boiler Upgrade Scheme gives grants in England and Wales to help property owners swap fossil-fuel systems for low-carbon heating.

Grant amounts (as at 2025-26):

• GBP 7,500 towards an air source or ground source heat pump.
• Biomass boilers are eligible only in limited rural situations.

Eligibility - key landlord points

• You must own the property (landlords are allowed; social housing is excluded).
• Property must be in England or Wales. Scotland and Northern Ireland have separate schemes.
• You must be replacing a fossil fuel system (oil, gas, LPG, direct electric). No grant if you are just swapping an existing heat pump.
• Property must have a valid EPC. Some guidance emphasises that there should be no outstanding loft or cavity wall insulation recommendations unless exempt, because BUS expects basic fabric measures first.

Note on gas boilers: official guidance is about replacing "fossil fuel systems", not "no gas boiler currently at all", but in practice you must be replacing your existing fossil fuel system, not keeping it and adding a heat pump as a side-system.

How it works and who applies

You do not apply directly. An MCS-certified installer applies on your behalf via Ofgem.

Process:

1. Get quotes from MCS-certified heat pump installers.
2. Installer checks your eligibility and designs the system.
3. You agree a quote that includes the BUS grant deduction.
4. Installer applies to Ofgem for a BUS voucher.
5. Installer has 3 months (air source) or 6 months (ground source) from approval to complete the installation.
6. After commissioning, they claim the GBP 7,500 from Ofgem and you pay the balance.

Important timing rule: from 8 May 2024, Ofgem introduced a 120-day deadline from commissioning to submit the BUS claim or it is rejected.

If the property is tenanted

• You need the tenant's cooperation for surveys and install.
• You should plan downtime and temporary heating if the swap takes multiple days.
• Once done, a more efficient system helps your EPC and attractiveness to future tenants.

In practice: this is most attractive on higher-value houses or good quality HMOs where your own capital plus the GBP 7,500 will genuinely be recouped in value and rent.

3. HUG2 - Home Upgrade Grant (off-gas, low-income, D-G)

What it is

HUG2 is for off-gas-grid homes in England with low-income households and poor EPCs, delivered through councils.

Funding window: April 2023 to March 2025 for the core pot, but many authorities are still delivering projects into 2025-26 from their awarded funding.

Eligibility - landlord angle

HUG2 supports homes that:

• Are off the gas grid.
• Have EPC D-G.
• Households are low income (means-tested thresholds vary but often under around GBP 31,000 combined household income) or in fuel poverty.
• Are in one of the councils that received HUG2 funding (there is a list on GOV.UK).

Landlords can benefit where the tenant meets income/fuel poverty criteria, the property is off-gas and D-G rated, and the council includes private rented stock in its delivery plans.

What HUG2 can fund

• Solid wall, cavity wall, loft and roof insulation.
• Air source heat pumps and other low-carbon heating.
• Solar PV and other energy efficiency measures, depending on local scheme design.

How it is delivered and how to access

Schemes are council-led. You do not apply to central government.

Process:

1. Use GOV.UK to check if your council is on the HUG2 list.
2. Visit your council's website (search "Home Upgrade Grant + council name").
3. Fill in an eligibility checker with property details and tenant income.
4. If eligible, the council refers the case to a delivery partner for survey and installation.

If the property is tenanted, you need to sign consent forms as owner. Works are scheduled with the tenant; there can be disruption if full heating and insulation packages are installed.

4. Great British Insulation Scheme (GBIS)

What it is

GBIS is the rebranded "ECO+" scheme, focused on lower-cost insulation measures. It targets households in council tax bands A-D (A-E in Scotland and Wales) and those in fuel poverty or on lower incomes. It is designed for properties with poor insulation but not necessarily the very worst EPCs like ECO4.

What it covers

• Loft insulation.
• Cavity wall insulation.
• Solid wall insulation in some cases.
• Other basic fabric measures.

Funding levels and exact measures vary per supplier.

Eligibility - landlord angle

• Owner-occupied and private rented homes can qualify.
• Priority is often given either to lower council tax bands or to fuel-poor households.

How to access

Like ECO4, you go via energy companies or trusted installers. There is no central GBIS application portal; you contact your tenant's supplier or a GBIS-participating installer and go through their eligibility check.

Given ECO4 is more generous but more targeted, you usually look at GBIS if the tenant does not meet ECO4 benefit/fuel poverty criteria but the property is still under-insulated.

5. Local authority and devolved nation schemes

Beyond ECO4 / BUS / HUG2 / GBIS you have a patchwork of:

Local authority grants

Many councils run their own "warmer homes", "green homes" or landlord-specific grant schemes funded by HUG2, ECO Flex, UKSPF or local budgets.

These often cover top-up insulation, boiler replacements, and small renewables.

How to find them:

• Go to your council's website and search "energy efficiency grant landlords", "warmer homes", or "HUG2".
• Check county-level and combined authority programmes if you are in places like Greater Manchester, West Midlands, etc.

Scotland

Scotland runs separate schemes like Warmer Homes Scotland, Home Energy Scotland grants and loans, and sometimes specific PRS support pots. These can fund insulation, heating upgrades and renewables for eligible households and landlords, usually with similar low-income and EPC-based targeting.

Wales

Wales has schemes like Nest and local authority programmes that cover energy efficiency upgrades for low-income households and sometimes private rented stock. Again, EPC and income criteria apply, and you apply via the Welsh government or local authority channels.

Given the variety, you treat local and devolved schemes as a bonus: assume nothing until you see a live scheme in writing with funding still available.

6. Decision framework - which scheme should you actually chase?

Think in three steps for each rental.

Step 1 - property basics

• Where is it? England on-gas / England off-gas / Scotland / Wales
• EPC band? A-C / D / E-G
• Heating system? Old gas boiler / Oil, LPG, direct electric / Already has heat pump

Step 2 - tenant situation

• On means-tested benefits / low income / fuel poverty risk?
• Council tax band (A-D or higher)?

Step 3 - choose scheme(s)

Scenario A - EPC E-G, on-gas, tenant on benefits (England / Wales / Scotland) Primary: ECO4 via supplier or installer. Secondary: GBIS if ECO4 not available. If off-gas in England: consider HUG2 via council as well.

Scenario B - EPC D, tenant low-income but not on benefits (England) ECO4 via ECO Flex if council participates (they can refer households based on income/health). GBIS if property in council tax bands A-D and under-insulated.

Scenario C - EPC D-G, off-gas England, low-income tenant HUG2 first (council-led whole-house upgrades including low-carbon heating). ECO4 may also be possible depending on supplier and local rules.

Scenario D - Reasonably efficient house but you want a heat pump (England / Wales) Boiler Upgrade Scheme (BUS) - GBP 7,500 grant. Works for landlords, regardless of tenant income. You must be replacing your fossil fuel system. EPC must be valid and basic insulation not outstanding.

Scenario E - Scotland / Wales Do standard ECO4/GBIS checks. Then check devolved schemes (Warmer Homes Scotland, Nest, local authority).

7. Practical steps for a BTL portfolio

For each property:

Pull the EPC Note rating and recommendations (loft, cavity, wall insulation, heating).

Ask your managing agent or tenant Are they on benefits / low income, any health vulnerabilities related to cold.

Map schemes

• EPC D-G + low-income or benefits: ECO4 / ECO Flex.
• Off-gas + low-income (England): HUG2 via council.
• Want a heat pump and own the place: BUS.
• Under-insulated but no ECO4 eligibility: GBIS or local scheme.

Check local council website Look for "Home Upgrade Grant", "Warmer Homes", "private landlord grants".

Coordinate with installers For ECO4/GBIS/HUG2, installers often handle most of the process once you and the tenant consent. For BUS, you drive it via an MCS installer and need to hit the 120-day window after commissioning.

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