EPC C Funding and Grants for Landlords UK 2026 — ECO4, Boiler Upgrade Scheme, and Green Finance

Why the EPC C 2030 deadline matters to landlords

The current Minimum Energy Efficiency Standards (MEES) prohibit letting properties with an EPC rating below E. Proposed regulations (expected to be enacted in 2027 or 2028) would raise this threshold to C by 2030 — with penalties of up to £30,000 for letting below the required standard. Landlords who begin upgrade planning in 2026 are in the best position to:

• Spread upgrade costs across multiple years rather than funding them all at once
• Access ECO4 and Great British Insulation Scheme grants while they remain available
• Benefit from Boiler Upgrade Scheme vouchers (£7,500 for air source heat pump) before the scheme's funding envelope is exhausted
• Achieve EPC C while tenants are in residence rather than during a disruptive void period

ECO4 — the most valuable grant scheme for landlords

The Energy Company Obligation scheme (ECO4) is a government programme that requires large energy suppliers to fund energy efficiency improvements in low-income and fuel-poor households. For landlords, the key eligibility rules are:

• Tenant eligibility: Your tenant must be in receipt of a qualifying benefit — including Universal Credit (with income below £31,000), Income Support, Pension Credit, Housing Benefit, or certain tax credits. The tenant must apply to their energy supplier for ECO4 referral, but the landlord must consent to works
• Property eligibility: The property must have an EPC rating of D, E, F, or G (EPC C or above is not eligible). The works must deliver a meaningful improvement in the EPC rating
• Eligible measures: Solid wall insulation (external or internal), cavity wall insulation, loft insulation, underfloor insulation, air source heat pump installation, solar PV, and in some cases boiler replacement. The energy supplier's installer assesses the property and determines which measures are applicable
• Cost to the landlord: ECO4 is a zero-cost scheme for eligible properties — the energy supplier funds the works entirely. However, the landlord must provide written consent for the works and may be required to contribute to costs if not fully eligible
• How to access ECO4: The tenant contacts their energy supplier or searches 'ECO4 scheme' on GOV.UK. The energy supplier arranges an assessment. Alternatively, landlords can proactively identify which tenants may be eligible and encourage them to apply. Some local councils operate 'ECO4 flex' referral schemes that extend eligibility beyond the strict benefit criteria

Boiler Upgrade Scheme (BUS) — £7,500 heat pump voucher

The Boiler Upgrade Scheme provides grants of up to £7,500 for air source heat pump installation, £7,500 for ground source heat pump, and £5,000 for biomass boiler installation. The scheme is available to landlords as well as owner-occupiers.

• Eligibility: Property must be in England or Wales. An air source heat pump must be installed by a certified installer (MCS accredited). The property must have a valid EPC with no outstanding recommendations for loft insulation or cavity wall insulation that have not been addressed
• How to apply: The certified MCS installer applies for the voucher on your behalf through the Ofgem BUS portal. The voucher value is deducted from the installer's invoice. You pay the balance only
• EPC impact: Heat pump installation typically delivers a significant EPC rating improvement — often moving a property from D to C or from C to B. Combine the BUS voucher with insulation improvements (potentially funded by ECO4 or GBIS) for maximum EPC rating gain
• Current funding: The BUS scheme runs until March 2028 with a fixed annual budget. Apply early — the scheme is popular and vouchers are limited. Installers are booking well in advance

Great British Insulation Scheme (GBIS)

The Great British Insulation Scheme is a separate government programme funding insulation measures for properties across a range of EPC ratings (D, E, F, G). Unlike ECO4, GBIS is open to a broader range of properties — not only those occupied by benefit recipients.

• Eligible measures: Cavity wall insulation, loft insulation, solid wall insulation, flat roof insulation, park home insulation, and underfloor insulation
• Landlord eligibility: Properties in council tax bands A–D in England and A–E in Scotland and Wales. Properties rated EPC D–G. Landlords may be eligible to contribute, or the scheme may fund fully depending on the assessment
• How to access: Apply via GOV.UK or through your energy supplier. An assessor visits the property to determine eligible measures. Works are typically completed within weeks of approval

Green finance — retrofit mortgages and green landlord loans

Where grant funding does not cover the full cost of EPC C upgrades, landlords can access green finance products specifically designed for energy efficiency improvements.

• Green buy-to-let mortgages: Several lenders (including NatWest, Barclays, Virgin Money, and specialist BTL lenders) offer preferential rates for properties that already hold EPC A or B ratings. Some lenders also offer 'green improvement' products that release additional funds specifically for retrofit at lower rates than standard further advances
• Landlord retrofit loans: The government's Warm Homes Plan (launched 2025) includes a loan guarantee scheme for private landlords funding energy efficiency improvements. Applications are made through approved lenders. Loan terms of up to 10 years at subsidised rates are available for qualifying retrofit works
• VAT reduced rate: Many energy efficiency improvement materials and some installations qualify for the 0% reduced rate of VAT (restored to 0% in April 2022). This includes insulation, solar panels, heat pumps, and energy efficiency controls. Check with your contractor whether the works qualify — a 20% VAT saving can make a significant difference to retrofit costs

EPC exemptions — when the cost cap applies

Landlords who cannot achieve EPC C despite spending £15,000 (the proposed MEES cost cap) can register a cost cap exemption. Other exemptions in the proposed regulations include:

• Cost cap exemption: Where spending £15,000 on qualifying improvements has not achieved EPC C, the landlord registers the exemption on the PRS Exemptions Register. The property can then be let below EPC C until the next available improvement opportunity
• Consent exemption: Where a tenant, leaseholder, or planning authority has refused consent for necessary works, and no reasonable alternative exists to achieve EPC C
• Listed building / conservation area: Where works would unacceptably alter the character of a listed building or building in a conservation area, and consent has been refused
• 7-year payback rule: Where no available improvement measure has a 7-year payback period (i.e. the measure would cost more than it saves in energy over 7 years), that measure does not need to be installed

Your EPC C action plan — four steps for 2026

1. Commission an EPC assessment: Order a current EPC from an accredited domestic energy assessor (DEA). The report will identify your current rating and list the specific improvement recommendations with estimated costs and EPC improvement. Use this as the basis for your upgrade plan.
2. Identify grant eligibility: Check whether your tenant qualifies for ECO4. Check whether the property qualifies for GBIS. Register interest in the Warm Homes Plan loan scheme. Identify your current EPC rating to confirm which schemes you are eligible for.
3. Commission retrofit works: Start with insulation (lowest cost, highest EPC impact in most properties). Then address heating — heat pump where feasible (BUS voucher), efficient boiler where not. Solar PV where roof orientation and condition allow. Use MCS-accredited contractors to maintain BUS and ECO4 eligibility.
4. Register exemptions where necessary: If after completing all cost-effective measures the property still does not reach EPC C, register the appropriate exemption on the PRS Exemptions Register before the 2028 or 2030 deadline.