Every regulatory statement below is taken from the primary source — the Department for Energy Security and Net Zero’s Improving the energy performance of privately rented homes: government response (gov.uk, published 21 January 2026) — which we re-verified against the published document on 1 September 2026. Where something is still to be settled in legislation, we say so.
The confirmed rules, plainly
One deadline: 1 October 2030, all tenancies. The consultation had floated a phased approach — new tenancies from 2028, all tenancies by 2030. That was dropped. The government response states that private landlords of all tenancies will be required to comply with the higher standard by 1 October 2030, and — in its own words — “there will not be an earlier compliance date for new tenancies” [gov.uk government response, 21 January 2026; verified 1 September 2026]. Until then, the existing minimum of EPC E continues to apply.
The standard is measured on new-style EPCs, with two parts. Rented homes will need to meet a primary standard set against a new fabric performance metric — insulation, glazing, airtightness: the building itself — plus a secondary standard set against either a heating system metric or a smart readiness metric, at the landlord’s choice [same source]. The deliberate effect: fabric comes first, and landlords are not forced to rip out a working boiler — but the walls, roof and windows cannot be dodged. For a retrofit contractor’s customers this is the important sentence in the whole policy: the fabric of the building is the primary legal test.
Early action is protected. A rented home that achieves an EPC C on the current rating system (the EER score on today’s certificates) before 1 October 2029 will be treated as compliant with the new standard until that EPC expires [same source]. An EPC lasts ten years — so a C achieved in, say, 2028 carries a property well past the deadline. This is the strongest practical argument for acting early rather than waiting for the new certificate regime to bed in.
The cost cap is £10,000 per property. Landlords must invest up to £10,000 per property on relevant improvements; if the property still does not meet the standard, they can register an exemption valid for ten years, after which the obligation returns [same source]. Two details matter: the £10,000 is a maximum over a ten-year period, and the government’s own impact assessment estimates the average spend to comply will be about £5,400 per property. Qualifying spend counts from 1 October 2025 — so money spent now, evidenced properly, counts.
An affordability route exists for lower-value properties. A “property value adjustment” exemption caps required investment at £10,000 or 10% of the property’s value, whichever is lower [same source] — less relevant in most of Oxfordshire, but real for some stock.
Penalties rise to £30,000 per property, per breach. The response confirms that the amended regulations “will allow for local authorities to issue a maximum fine of £30,000 per property per breach” — a substantial rise on today’s maximum, with the increase requiring new powers in primary legislation [same source].
The legal timetable: regulations in 2027, compliance by 2030. The amended regulations are expected to come into force in 2027, with landlords required to comply from 1 October 2030 [same source]. The direction has not moved since the January 2026 announcement, but check the current gov.uk position before making an irreversible decision — we do, before every landlord survey.
What actually gets a D or E terrace to a C
The Oxfordshire private rented stock that fails today is dominated by one building type: the solid-wall Victorian or Edwardian terrace. Nationally, about half the private rented sector sits below C, and solid walls are the reason the cheap wins run out.
The measures that move the score, roughly in order of disruption:
- Loft insulation to ~300 mm. The cheapest points on the certificate. Old 80–100 mm layers are common and score poorly.
- Cavity wall insulation — only where a genuine cavity exists. Many “cavity” elements in older stock are not fillable as found: on our Howard Street project, a borescope survey found the rear extension’s 50 mm cavity part-blocked with builders’ rubble, which had to be cleared well below damp-course level before bonded-bead fill could go in. Filling a fouled or irregular cavity blind creates damp, not points.
- Internal wall insulation on the solid walls. The decisive measure on a terrace, and the one that must be done with the right materials — vapour-open wood fibre and lime on solid brick, not foam and gypsum. It is also where the new fabric-first legal metric points.
- Floor insulation. Suspended timber floors insulated between the joists with the sub-floor ventilation preserved.
- Glazing and draughtproofing. Double glazing where it is missing; airtightness detailing at the junctions.
- Controlled ventilation. Not a scoring line so much as the thing that keeps an insulated, occupied rental free of condensation and mould — and mould is now a legal problem for landlords in its own right. See our damp and mould guide.
- Heating and controls. A modern system with proper controls; under the new dual metric, a heat pump is one route to the secondary standard but not compulsory where the smart route is available.
How far can that stock actually go? Howard Street is our answer. A c. 1900 solid-brick mid-terrace in East Oxford — the most common hard-to-heat house type in the city — went from EPC E (49) in 2013 to B (89) in January 2022 on the public register: internally insulated walls recorded as “good”, 300 mm loft “very good”, heat pump with zoned controls “very good”, estimated emissions down from 5.2 to 0.7 tonnes of CO₂ a year. That was a whole-house retrofit, deeper than a compliance package needs to be — but it demonstrates the headroom. A landlord aiming at C on this housing type is not near the ceiling of what the building can do; the same fabric logic, applied in a lighter package, is how a D or E becomes a C with margin to spare.
The full method is in our whole house retrofit guide.
Planning a portfolio around tenancies
The mistake we see is treating 2030 as one cliff-edge and every property as one project. Four years is enough time to do this in phases, cheaply and without a single lost month of rent — if the sequencing starts now.
1. Audit the certificates first. List every property, its current rating, its EPC expiry date, and — critically — how old the assessment is. Many older EPCs undercount improvements already made; a reassessment alone sometimes moves a high D to a C. Note that post-retrofit EPCs count towards the £10,000 cap.
2. Triage into three groups. High Ds needing a light package; Es and low Ds needing wall or floor insulation; and properties where the cap or an exemption may genuinely apply. The worst certificates get planned first, because they need the most disruptive works.
3. Put the disruptive works into voids. Internal wall insulation, floor insulation and heating changes are far easier in an empty house — plaster comes off, floors come up. Map your likely tenancy changeovers between now and 2029 and assign the heavy measures to them. Loft top-ups, ventilation and controls can be done tenanted.
4. Aim for the 2029 early-action window. A C on the current rating system before 1 October 2029 buys compliance until that certificate expires — the cleanest, best-evidenced route, using the assessment method that exists today rather than one still being finalised.
5. Keep every receipt. The cost cap, the exemptions and any future enforcement all turn on evidence of qualifying spend, which counts from 1 October 2025. Invoices, specifications and certificates should be filed per property from now on.
6. Batch the surveys. Surveying several properties in one pass costs less than six separate mobilisations and lets a contractor design repeatable packages across similar house types — most portfolios are variations on two or three floor plans.
What to do now
- This month: pull every EPC for the portfolio from the register; note ratings, expiry dates and assessment ages.
- This quarter: get the below-C properties surveyed properly — construction, cavities checked with a borescope where relevant, ventilation, damp — so the packages are designed on facts, not assumptions.
- This year: do the tenant-friendly measures (lofts, ventilation, controls) across the board, and schedule the first heavy packages into known voids.
- By 2029: have every property either at C on its current certificate or with an evidenced, cap-compliant exemption in place.
We survey rented properties for free across Oxfordshire, and we design compliance packages against the actual construction of the house — because on this stock, the difference between a package that scores and a package that causes damp is the difference between wood fibre and the wrong foam board. Book a survey.
Regulatory statements in this guide are from the Department for Energy Security and Net Zero, “Improving the energy performance of privately rented homes: government response”, published 21 January 2026 (gov.uk) — checked against the published document on 1 September 2026. Legislation implementing these rules is expected in 2027; we re-verify the current position before every landlord survey.