This article sets out the confirmed rules with sources, then what they actually mean for a typical Oxford terrace portfolio, and the order we recommend doing the works in.
The rules as confirmed — not the rumour version
The current legal floor, in place since 1 April 2020, is EPC band E, with a £3,500 cost cap and penalties of up to £5,000 per property (gov.uk MEES landlord guidance). That regime is being replaced. The government’s consultation response, published 21 January 2026 (gov.uk consultation outcome), confirms:
- One deadline: 1 October 2030. All tenancies — existing and new — must meet the higher standard by that date. The earlier idea of a phased 2028 start for new tenancies was dropped.
- A fabric-first standard. Compliance is measured against the reformed EPC’s fabric performance metric as the primary test, plus one secondary metric of the landlord’s choosing — smart readiness or heating system. You cannot reach compliance on heating gadgets alone; the walls, roof and floors have to perform.
- A £10,000 cost cap per property (reduced to 10% of value for properties worth under £100,000). Spend up to the cap without reaching the standard and you can register a ten-year exemption.
- Penalties up to £30,000 per breach, per property, issued by local authorities — six times the current maximum.
- Timing: the government aims to have the updated PRS regulations in force in 2027. Short-term lets are excluded for now.
The wider Warm Homes Plan, published the same week, frames this as part of a funded national upgrade programme — which also means demand for competent retrofit contractors will tighten as 2030 approaches.
What this means for an Oxford terrace portfolio
Most Oxford rental stock that sits at D or E is Victorian or Edwardian solid-wall terrace housing — exactly the type the old EPC regime was gentlest on and the new fabric-first metric is hardest on. An uninsulated solid brick wall loses heat at roughly five times the rate of a well-insulated one, and under the reformed EPC that fabric weakness is the primary score.
We know what the gap looks like because we have measured and closed it. A solid-wall mid-terrace on Howard Street in East Oxford — 81 m², gas boiler, walls rated “very poor” — sat at EPC E (49). After a whole-house fabric retrofit (wood-fibre internal wall insulation with lime plaster, cavity fill to the rear addition, 300 mm loft insulation, flat-roof and floor insulation, double-glazed timber sash windows, controlled ventilation, plus an air-source heat pump and solar PV), the post-works certificate came back at B (89) in January 2022, with the certificate’s modelled CO₂ falling from 5.2 to 0.7 tonnes a year — both certificates are on the national EPC register. That is deeper than the 2030 standard demands; the point is that solid-wall terraces are fixable, measurably.
For a landlord, the deadline maths is simpler: a D-rated terrace typically needs a loft top-up, wall insulation to the worst elevations, draught and ventilation work, and better heating control — a package that fits within the £10,000 cap far more comfortably in 2026 than it will in a 2029 scramble, when every certified installer in the county is booked.
The order of works — get this right and you pay once
Sequence matters more than product choice. Done in the wrong order, measures fight each other; done in the right order, each one makes the next cheaper.
- Survey and rating check first. Understand where the property actually loses heat (we use thermal imaging on our surveys) and how the reformed EPC will score it — not how the old one did.
- Roof and loft. The cheapest points on the certificate. Top up to 300 mm, insulate any sloping-ceiling sections, keep the eaves ventilation clear.
- Walls. Solid walls need internal or external insulation; cavity walls need checking and filling. This is the heavy lift on fabric score and on tenant comfort.
- Floors and airtightness. Suspended timber ground floors and the junctions around windows and services.
- Ventilation. Non-negotiable once you tighten the fabric — controlled ventilation prevents the condensation problems that tighter, warmer homes otherwise develop (see our guide to condensation on solid walls in winter).
- Heating last. A heat pump or new boiler sized for the improved fabric is smaller and cheaper than one sized for the leaky version. Heat pumps are designed and coordinated by us and installed with our managed certified partners.
Portfolio landlords should also phase across properties around tenancy renewals — covered in our guide to retrofitting HMOs and tenanted stock.
Where to start
Book a free survey on the property you think is furthest from C. One walk-through with a thermal camera and the current EPC in hand usually settles the whole portfolio conversation: what each house needs, what order, and what fits inside the cap.