What EPC C by 2030 Actually Asks of You

The deadlines are fixed now. Socially rented homes in England need to reach EPC C against one of the new metrics by 1 April 2030. Privately rented homes in England and Wales need to meet a two-metric standard by 1 October 2030. Both government responses have been published, so this is no longer a consultation to keep half an eye on.

What isn't fixed is the instrument you'll be measured with. The reformed EPC that defines "C" under the new metrics doesn't arrive until the second half of 2027, and at the time of writing the exact launch date still hasn't been published.

So most teams are in an awkward position: roughly three budget cycles until the deadline, a spend threshold that shapes what's worth doing, and a certificate that will look different by the time anyone checks. Here's what's actually confirmed, what still isn't, and what you can sensibly do in the meantime.

Why this one is different

Most compliance deadlines are a date and a target. This one is a date, a target, a spending threshold, and a change of measuring instrument, and they interact.

The £10,000 threshold isn't a budget. It's the point at which, if a property still doesn't meet the standard, you can register an exemption instead. That inverts how a lot of programmes get planned. The question stops being only "what's the cheapest route to C?" and becomes "what does this £10,000 buy: compliance, or an exemption?" Money spent on a measure that genuinely improves a home but doesn't move the metric you're assessed on still counts against the threshold.

Sequencing stops being a delivery detail and becomes the strategy.

Social rented: England, 1 April 2030, one metric

Every new or existing socially rented property in England must have an EPC of C or higher against any one of three metrics (fabric performance, smart readiness, or heating system) by 1 April 2030, measured using reformed EPCs. A second metric must be met by 1 April 2039. This is set out in the government response on socially rented homes, published in April 2026.

Government deliberately stepped back from mandating a fabric-first route. Providers pick the metric that suits their stock.

The spend exemption is the detail most worth reading twice: it is £10,000 per metric, not per property. £10,000 toward the first metric, with an exemption lasting 10 years to 2040, and a further £10,000 toward the second, with an exemption running to 2049. Up to £20,000 across the two, but staged. The staging is what makes the choice of first metric consequential rather than administrative.

Note the scope: this regime is England only.

Private rented: England and Wales, 1 October 2030, two metrics

If you run a landlord advice service, a licensing scheme, or mixed-tenure stock, the private rented rules are structured differently and it's worth not carrying assumptions across.

All tenancies must comply by 1 October 2030. The earlier staging (2028 for new tenancies, 2030 for the rest) was dropped in the government response on privately rented homes, published in January 2026. There is now one date. Commentary published before that still refers to a 2028 new-tenancy deadline; it's out of date.

The standard is dual-metric from the outset: fabric performance as the primary requirement, plus either smart readiness or heating system as a secondary, at the landlord's discretion.

The cost cap is £10,000 per property, reduced from the £15,000 originally consulted on. Three details matter for anyone advising landlords:

• Spend on relevant measures installed since 1 October 2025 already counts toward the cap. Work done last autumn is on the meter.
• Third-party funding counts toward the cap, including government scheme funding. The one exception is Boiler Upgrade Scheme funding, which can still be used but doesn't count against the £10,000. (Several briefings have this backwards.)
• Properties valued below £100,000 get a Property Value Adjustment exemption, reducing the maximum spend to 10% of property value.

Local authorities can issue penalties of up to £30,000 per breach, and the same applies to false entries on the exemptions register.

Existing certificates carry over

A privately rented home scoring C or higher against the current Energy Efficiency Rating on an EPC issued before 1 October 2029 is treated as compliant with the higher standard until that EPC expires or is replaced. The ten-year validity period is being maintained for both existing and reformed EPCs.

For a meaningful slice of most portfolios, then, the near-term question isn't what the new metrics will say. It's when certificates expire, and whether there's a window before October 2029 worth using.

What still isn't settled

We'd rather flag the gaps than write around them.

EPC reform was originally targeted for October 2026 and was postponed in March 2026 to the second half of 2027. Government committed to agreeing a revised launch date and shared implementation plan with industry and the devolved administrations by summer 2026; as we publish, no exact date has been confirmed. RdSAP 10, live since 15 June 2025, is what's producing certificates in the meantime.

The legacy EER will be retained on reformed EPCs for a transitional period, but government has described that as lasting "until it is no longer required" rather than naming an end date. The October 2029 date above is a private rented sector transitional cut-off, not the EER's retirement.

Anyone offering certainty about how the new metrics will score your specific properties today is overselling. What's reasonable now is planning that holds up under either measuring stick.

The three questions underneath all of this

Strip out the acronyms and the planning problem is small enough to state plainly.

Which homes are already fine? Properties with a valid C or above need monitoring for certificate expiry, not programme attention. Getting this group right is the cheapest win available and it's usually larger than teams assume.

Which homes can £10,000 realistically get to C? This is the programme, and it's where sequencing decides the outcome, because the order measures go in changes what the next one achieves and what it costs.

Which homes can't get there for £10,000? These are your exemption candidates, and more usefully your funding candidates. The Warm Homes Plan commits £15 billion of public investment by 2030 to upgrade up to 5 million homes, including around £5 billion for low-income and fuel poor households, of which £4.4 billion is direct capital grants. Warm Homes: Social Housing Fund Wave 3 brings £1.3 billion of government funding, more than matched by the sector, giving over £2.6 billion currently in delivery. From 2027/28 government intends to merge the social housing and local grant schemes into a single low-income capital scheme with area-based delivery.

A home that can't reach C on £10,000 of your money may well reach it on £10,000 plus grant funding. Identifying that group early is what turns a funding bid from aspirational into specific.

All three questions need stock knowledge at property level. Archetype averages will tell you roughly how many homes sit below C. They won't tell you which ones are just under the line, which are a long way off, or why the same £10,000 produces completely different results in two houses on the same street.

Choosing a metric is a stock decision, not a policy one

For social landlords especially, the flexibility to pick your metric is genuinely useful, and worth thinking about now rather than in 2029.

Fabric is the durable choice. Walls and roofs last decades, and fabric performance keeps paying regardless of what happens to tariffs, fuel prices, or grid carbon intensity. It's also generally the most expensive and most disruptive, and on solid wall, heritage, and certain flat typologies it runs into hard limits.

Heating systems get replaced every 10 to 20 years anyway. A replacement cycle that's already scheduled might do compliance work almost for free if it's timed and specified with the metric in mind.

Smart readiness is new, and cheap relative to the others, but it's the least well understood of the three, and we'd be cautious about building a strategy on it before the methodology is published in full.

The honest answer is that the right first metric probably differs by archetype within a single portfolio. Which is exactly the sort of question that's answerable if your data sits at property level, and unanswerable if it doesn't.

Where this fits with what we do

This is the work Energicore is built for: modelling each property individually rather than by archetype average, ranking measures by what they actually return, checking properties against grant scheme criteria, and producing costed, sequenced plans you can put in front of a board or a resident.

We're tracking the reform closely and will update our modelling as the new metrics are published. We'd rather do that properly, once the methodology is out, than guess early and have you plan against our guess.

If you're starting this work now, the most valuable thing you can do before the reformed EPCs arrive isn't picking measures. It's getting an honest, property-level picture of where your stock actually sits, so that when the metrics land, you're refining a plan rather than starting one.

Sources

Everything above is drawn from published government documents. Where industry commentary and the primary source disagree, we've followed the primary source.

Primary: GOV.UK

• Improving the energy efficiency of socially rented homes in England: government response: the 1 April 2030 and 1 April 2039 deadlines, the three metrics, and the £10,000-per-metric spend exemption
• Improving the energy performance of privately rented homes: government response: the single 1 October 2030 deadline, the dual-metric standard, the £10,000 cap, Boiler Upgrade Scheme treatment, the Property Value Adjustment, and the £30,000 penalty
• Improving the energy performance of privately rented homes: government response (PDF): full detail on what spend counts toward the cap from 1 October 2025
• Reforms to the Energy Performance of Buildings regime: partial government response: the four new metrics, ten-year EPC validity, and retention of the legacy EER
• Warm Homes Plan: the £15 billion commitment, low-income grant funding, and the move to area-based delivery from 2027/28

Industry and sector

• Elmhurst Energy: Government confirms EPC reform will be postponed to the second half of 2027
• Elmhurst Energy: Your essential checklist for RdSAP 10: the 15 June 2025 go-live date
• National Housing Federation: Warm Homes: Social Housing Fund: the £1.3 billion Wave 3 allocation and sector match funding
• NRLA: Government cuts landlord spending cap: the reduction from £15,000 to £10,000
• Inside Housing: Government delays EPC reforms to the second half of 2027