Social rent versus private homes: EPC ratings compared

Social rented homes are, on the published data, more energy efficient than private rented homes. In England and Wales, 28% of social and affordable rented homes have an EPC rating of D or worse, which means 71% of social housing is in band C or better under SAP 2012 (RdSAP v9.93)¹. In Scotland, 85% of social rented homes achieve EPC D or above, and 65% reached EPC C or better in 2022². The private rented sector lags: 50% of private rented dwellings in Scotland reached EPC C or better in 2022, and 14% of private rented properties in Scotland are rated E, F or G against 5% of the social rented sector³.

The gap is consistent across the UK. In Scotland, social housing has a mean energy efficiency rating of 71.8 SAP points against 66.9 for private dwellings². Around 2% of social sector dwellings fall in EPC bands E, F or G, against 14% of the private rented sector². In England, the share of homes rated Band C or higher rose from 12% in 2010 to 56% in 2024 across all tenures⁵.

What follows compares the two tenures on the EPC data, sets out where social rent still falls short, and explains what the ratings mean for damp, mould and the Warm Homes Plan.

What the EPC data says: social rent versus private rented homes

The headline comparison favours social housing on every published measure. In Scotland, social housing as a whole is more energy efficient than the private sector, with a mean energy efficiency rating of 71.8 compared to 66.9 for private dwellings². The same source records that 71% of social housing is in Band C or better under SAP 2012, higher than both the private rented sector at 50% and the owner-occupied sector at 52%².

The private rented sector's weaker position is long-standing. Twenty percent of private rented housing has a poor EPC rating of E, F or G, compared to just 6% of social housing⁷. The SAP rating has been consistently much higher for social housing than for both private rental and owner-occupied housing⁹.

The reasons are structural rather than incidental. Social landlords hold large, managed stock, which makes planned retrofit cheaper per home than the one-off improvements a private landlord commissions between tenancies. Social housing is also subject to its own minimum standards: the consultation on the Energy Efficiency Standard for Social Housing post-2020 proposed that no social housing should be let after 2025 if the energy efficiency rating is lower than EPC D⁵. The Warm Homes: Social Housing Fund targets social homes below EPC Band C, with 1.2 million such homes identified in England⁶.

For a household, the practical meaning is that a social tenancy is more likely to come with a home that is cheaper to heat and less likely to sit in the lowest bands. That is a real advantage in energy independence terms: a better fabric and a more efficient heating system reduce the units a household must buy, whatever the tariff. The dependence that remains is the same as for any grid-connected home: the gas or electricity supply, the supplier, and the price cap that sets the unit rate.

Social rent in England: 62.68% of homes rated Band C or above

The figure of 62.68% is the share of social rented homes in England rated Band C or above in the data behind the Warm Homes Plan. It sits below the 71% of social housing in band C or better under SAP 2012 (RdSAP v9.93)¹, and the difference reflects the different samples and dates behind the two numbers.

The trend is upward. In England, the share of homes rated Band C or higher rose from 12% in 2010 to 56% in 2024 across all tenures⁵. Social housing has moved faster than the average. In Scotland, the share of social rented properties at EPC C or better increased from 53% in 2016 to 69% in 2023¹⁰, and the Scottish House Condition Survey recorded 65% in 2022, up from 56%³.

Local variation is wide. Tower Hamlets in London stands out as the local authority with the highest percentage of housing in Band C or above, with 82% of dwellings holding a valid EPC registering a score of 69 or above¹¹. A national average of 62.68% therefore conceals authorities well above and well below it.

For a social tenant, the rating on the certificate is not a fixed attribute of the tenancy. It changes when the landlord installs insulation, glazing or a new heating system, and it is the landlord, not the tenant, who commissions those works. The household's lever is the repair and complaint route, not the improvement budget.

Where social rent still falls short: 28% below Band C

The 28% of social and affordable rented homes in England and Wales rated D or worse is the number that matters most for the households living in them¹. These are homes that fall below the standard the Warm Homes: Social Housing Fund is designed to reach, and 1.2 million social homes in England sit below EPC Band C⁶.

The Social Housing Decarbonisation Fund was set up to upgrade significant amounts of social housing stock to EPC Band C or higher¹², transforming some of the worst-performing properties up to EPC Band A or B¹³. The Warm Homes: Social Housing Fund provides energy performance measures and low carbon heating to social housing residents in EPC Band D to G homes in England¹.

Fuel poverty concentrates in the lower bands. Fuel poor households are less likely to live in the owner-occupied sector (75% versus 45%) and more likely to be in the rental sectors (20% versus 11% private rental and 35% versus 14% social rented)¹⁴. In Scotland, 55% of households in the social rented sector are modelled to be in fuel poverty under the October to December 2026 price cap¹⁵.

The dependence that remains for a household in a lower-rated social home is direct: the home needs more units of gas or electricity to reach the same temperature, and the tenant cannot commission the fabric improvements that would reduce that demand. The route out is through the landlord's improvement programme and the statutory complaint process.

Scotland's social rented sector: 35% not achieving EPC C

Scotland publishes the most detailed tenure split in the UK. Thirty-five per cent of homes in the social rented sector do not achieve EPC C, against 50% of the private rented sector and 52% of owner-occupied homes⁴. The social sector is the best performer of the three, but more than a third of its homes still fall short of the C standard.

The direction of travel is positive. Homes in the social rented sector are now some of the most energy efficient in Scotland, with 85% already achieving EPC D or above⁵. The share of social rented properties at EPC C or better rose from 53% in 2016 to 69% in 2023¹⁰, and the Scottish House Condition Survey recorded 65% in 2022, up from 56%³.

The lowest bands are concentrated in the private rented sector. In Scotland, 48% of private rented properties are rated EPC D or lower, and the sector has the highest percentage at 14% of E, F or G rated properties, compared with the social rented sector at 5%¹⁶.

Scottish policy sets two targets:

1. No social housing should be let after 2025 if the energy efficiency rating is lower than EPC D⁵.
2. Maximise the number of homes in the social rented sector achieving EPC B by 2032, with no detriment to environmental impact or air quality⁵.

The private rented sector faces a minimum standard equivalent to EPC C by 2028 where technically feasible and cost-effective at change of tenancy, with a backstop of 2028 for all remaining existing properties¹⁷.

For a Scottish social tenant, the practical position is that the home is more likely than a private let to be at EPC C or above, but a substantial minority of social homes remain below it, and the improvement timetable runs to 2032 for the higher Band B target.

Why the ratings matter: damp, mould and the Warm Homes Plan

The EPC band is a proxy for how much heat a home loses and how much it costs to keep warm. A home at Band D or worse needs more energy to reach the same temperature, which raises bills and, where heating is inadequate or intermittent, raises the risk of condensation and mould.

The Warm Homes Plan sets the standards. The Warm Homes: Social Housing Fund Wave 3 requires grant recipients to improve social homes to at least EPC Band C, with homes starting at EPC bands E to G that cannot reasonably reach EPC C within the cost cap exempt⁶. The Warm Homes: Local Grant targets Band C for eligible homes, covering owner-occupied properties at Band D, E, F or G and privately rented properties at Band D or E¹⁸.

Earlier schemes used the same logic:

• The Sustainable Warmth Competition prioritised projects upgrading homes with an EPC rating of E, F or G¹⁹.
• The ECO4 guidance treats any social housing with an EPC rating of D, E, F or G as eligible through the low-income group²⁰.
• The Great British Insulation Scheme treats all eligible social housing through the low-income group rather than the general group²¹.

The wider policy direction is to raise the floor. The government has set out requiring all social housing in the UK to meet an EPC rating of at least C or equivalent by 2030⁹, and preventing landlords from renting out homes under an EPC rating of C or equivalent in the private rented sector by 2030⁹.

For a household, the ratings determine eligibility for the schemes that pay for improvement, and the schemes determine whether the home's running cost falls. The dependence that remains is on the landlord applying, the grant being awarded, and the works being done to the standard the certificate assumes.

What Awaab's Law means for tenants in lower-rated homes

Awaab's Law came into force on 27 October 2025, giving tenants stronger rights for safer homes. It requires registered social landlords to investigate damp or mould reports within 10 working days and address emergency hazards within 24 hours.

The legislation responds to a rising complaint volume. Complaints to the Housing Ombudsman about damp and mould in social housing rose by nearly 17% in 2023/24 compared to the previous year.

The link to EPC ratings is indirect but real. A home in a lower band is more likely to suffer condensation and mould because it loses heat quickly and may be heated intermittently. The law does not set an EPC standard; it sets a response standard. A tenant in a Band D or E social home who reports damp or mould is entitled to the same 10 working day investigation and 24 hour emergency response as a tenant in a Band B home.

The private rented sector operates under different rules. Since April 2020, landlords can no longer let or continue to let properties covered by the MEES Regulations if those properties fall below the minimum standard, unless they have a valid exemption²³. Privately rented homes in England and Wales must have at least an EPC rating of E since 2020²⁴. The Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 set the original framework, under which from 1 April 2018 privately rented domestic and non-domestic property below a minimum energy-efficiency standard based on the EPC rating cannot be let²⁵. The direction is towards EPC C: regulations were planned for 2025 requiring EPC C equivalent at change of tenancy where technically feasible and cost-effective⁷, and the Clean Flexibility Roadmap sets a minimum score of EPC C against the fabric performance metric and either the heating system or smart readiness metric from 1 October 2030²⁶.

For a social tenant, Awaab's Law is the enforceable route. For a private tenant, the MEES framework is the route, and it currently sets a lower floor.

Retrofit savings for social housing residents: what the National Housing Federation found

The National Housing Federation published analysis in November 2022 estimating that upgrading remaining social rent homes to EPC A, B or C could save residents more than £700m a year, an average of 42% or £567 per household.

That figure is the strongest available statement of what the EPC gap costs households. It is an estimate, modelled from the stock and the improvement costs, not a metered outcome. It applies to the remaining social rent homes below the target bands, which is the 28% of social and affordable rented homes in England and Wales at Band D or worse¹ and the 1.2 million social homes below EPC Band C in England⁶.

The mechanism is straightforward. A home improved from Band D to Band C needs fewer units of gas or electricity to reach a given temperature, so the annual bill falls. The saving is largest for homes starting in the lowest bands, which is why the schemes prioritise E, F and G¹⁹ and why the Warm Homes: Social Housing Fund targets Band D to G homes¹.

The Touching the Voids report, published by Sustainable Homes in June 2016, approached the same question from the landlord's side. It reviewed the loan data for 71,000 mortgages and found that more than 200,000 homes across all tenures in England remained empty for more than six months in 2014²². It also cited National Housing Federation analysis that 1 in 10 social landlords have more than £1 million in rents outstanding²². The report's argument is that energy efficient housing is linked to reduced rent arrears and voids, so the saving accrues to the landlord as well as the tenant.

For a household, the retrofit saving is the clearest measure of what a better EPC band is worth: an average of 42% or £567 per household per year, on the National Housing Federation's estimate. The dependence that remains is that the works must be funded and completed before the saving appears.

Household type and ratings: why one-person homes compare differently

Household composition affects how an EPC rating translates into a bill, and the two tenures differ sharply on composition. In 2021-22, 43% of the social rented sector were one-person households, a significantly higher proportion than the private rented sector²⁷. Around 22% of renters in the social sector are households with children, compared with 19% of private sector renters²⁸.

A one-person household uses less energy in total than a family, but the fixed heat loss of the dwelling is the same. A one-person home in a Band D property therefore carries the full fabric penalty on a single income, which is one reason fuel poverty concentrates in the social rented sector: 55% of social rented households in Scotland are modelled to be in fuel poverty under the October to December 2026 price cap¹⁵.

Property type matters too. Around two-thirds of Council or Housing Association houses have EPC ratings A to C, compared to around 40% of houses in other tenure types¹. Around a third of EPC rated bungalows have EPC ratings A to C compared to almost half for all other types of houses¹. Bungalows, which are common in social stock in some areas, are harder to bring up the bands.

Tenancy stability is the other difference. Private renters (6%) were less likely than social renters (10%) to have someone in the household on a social housing waiting list²⁷, and 8% of social rented accommodation is overcrowded compared with 1% of owner-occupied accommodation²⁷. Overcrowding raises energy use per dwelling while lowering it per person, which complicates any direct comparison of bills between tenures.

For a household comparing the two tenures, the EPC data points one way: social rent is more likely to deliver a higher band and a lower running cost. The composition data explains why the bill outcome still varies widely within each tenure.