A cold rented home can leave tenants paying more each month for less comfort. ECO4 grants for private tenants were designed to help address exactly that problem, funding measures such as insulation and efficient heating in qualifying homes without asking the tenant to pay the full cost upfront.

However, there is an important date to understand. The ECO4 scheme was scheduled to close to new delivery on 31 March 2026. If you are reading this now, new ECO4 applications are generally no longer available. This guide explains how the scheme worked for private renters, what happened to applications already underway, and the practical support worth checking now.

How ECO4 grants for private tenants worked

ECO4 was the fourth phase of the Energy Company Obligation, a government-backed scheme delivered by energy suppliers. Its purpose was to improve homes that were expensive to heat, particularly for households on lower incomes or receiving qualifying support.

For private tenants, the funding was not a cash payment handed to the renter or landlord. Instead, it could pay for suitable energy-efficiency improvements at the property. Depending on the home, this may have included loft, cavity wall, internal wall or solid wall insulation, a replacement for an old non-condensing boiler, central heating improvements, or an air source heat pump.

The result could be a warmer property that holds on to heat for longer and needs less energy to maintain a comfortable temperature. That can mean lower heating costs, but the actual saving depends on the property, the heating system, energy use and tariffs. A grant-funded upgrade should be viewed as a long-term improvement to comfort and efficiency, not a guaranteed figure off every bill.

ECO4 focused on homes with a lower Energy Performance Certificate rating, usually EPC bands D to G. It also focused on households meeting an eligible route, often through certain benefits, the Warm Home Discount core group, or local authority eligibility rules sometimes referred to as Flex.

Why your landlord had to be involved

A private tenant could begin an eligibility enquiry, but the property owner had to agree before any work could go ahead. Heating systems, radiators, insulation and heat pumps are permanent changes to the building, so an installer cannot simply fit them at a tenant’s request.

Landlord consent was a key part of the process. A responsible assessor would confirm who owns the property, explain the proposed measures and obtain the necessary permission before installation was arranged. For a tenant, this was often the most important conversation to have early.

It can help to frame the discussion around shared benefits. The tenant may gain a warmer, more affordable home, while the landlord may gain an improved property with a better EPC rating and lower risk of issues linked to cold or damp. The landlord should still consider the work carefully, especially where a heat pump, internal wall insulation or changes to existing heating are proposed.

Permission did not automatically guarantee funding. The household, property and recommended measure all needed to meet the rules in place at the time.

Which homes were most likely to benefit?

ECO4 was aimed at properties where an upgrade could make a meaningful difference. Older homes with poor insulation, electric-only heating, inefficient boilers or no working central heating were often strong candidates for an assessment.

A survey mattered because the right measure depends on the building. Installing a new heating system without tackling major heat loss may not deliver the result a household expects. Equally, insulation needs to be appropriate for the construction of the home and any existing damp or ventilation concerns need to be identified first.

This is why a free property assessment was more useful than choosing a measure from a list. An assessor could look at the home’s EPC information, walls, loft, heating, ventilation and occupancy before recommending a suitable route. In many cases, a package of improvements made more sense than one isolated change.

What tenants needed to provide

The paperwork could feel daunting, but much of it was straightforward when handled in the right order. A tenant would normally need to confirm their address, tenancy details and household circumstances, while the landlord would need to provide consent and property information.

Evidence of eligibility was also required where the application used a benefits-based route. If local authority criteria were being used, the process could be different because each council set and administered its own qualifying rules within the scheme framework.

A good provider made the process clearer by checking the likely eligibility route before arranging a survey. They could then explain what documents were needed and manage the ECO4 paperwork, rather than expecting a household to decipher technical funding rules alone.

What happens if you started an ECO4 application?

If you began an enquiry or assessment before the scheme deadline, contact the provider that handled your case. Some applications may have been at different stages: eligibility checking, landlord consent, survey, funding review or installation planning. Only the provider can confirm whether a particular case was approved and whether work can still be completed under an existing arrangement.

Do not assume an enquiry means funding was secured. Funding approval, technical suitability, landlord permission and installer capacity were all separate parts of the journey. It is reasonable to ask for a clear update on the status of your application and any next action required from you or your landlord.

Support private tenants can check after ECO4

The end of ECO4 does not make an inefficient rented home any less urgent. If your bills are high or the property is hard to heat, start by speaking to your landlord in writing. Explain the issue clearly, whether it is an unreliable boiler, missing loft insulation, draughts, persistent cold rooms or damp that may be linked to poor heating and ventilation.

You can also check with your local council for current energy-efficiency, hardship or home-improvement support. Availability varies by area and budgets can change, so it is worth asking specifically about help for private renters and whether landlord participation is required.

Your energy supplier may have additional support for customers struggling with bills, although this is not always a replacement for a major heating or insulation upgrade. If the home has serious hazards, such as dangerous heating equipment or significant damp and mould, contact the landlord or letting agent promptly and keep a record of all communication.

At Vellurex, the aim is always to make grant support simple and stress-free: start with eligibility, assess the home properly, then identify the funding route and improvements that genuinely fit the property.

Questions private tenants often ask

Could a tenant apply without the landlord?

A tenant could make an initial enquiry and have their circumstances checked, but permanent energy-efficiency work required the owner’s permission. It was best to involve the landlord as soon as a suitable measure was identified.

Did ECO4 pay money directly to tenants?

No. ECO4 funding was generally used towards eligible installation work rather than paid as cash to a tenant. The scope of funding depended on the property, the household’s eligibility and the measures recommended after assessment.

Could a landlord refuse the work?

Yes. A landlord was not obliged to consent to every proposed improvement. If they had concerns, ask whether they would consider an alternative measure that improves comfort with less disruption. A professional assessment can help explain why a recommendation has been made.

Is a poor EPC enough to qualify?

Not on its own. A low EPC rating was an important property factor, but the household also generally needed to meet an approved eligibility route and the works had to satisfy scheme rules.

If your rented home is costly to heat, do not wait for another winter to raise it. A clear conversation with your landlord, backed by evidence of the problems you are experiencing, is a practical first step towards a warmer home and lower energy use.