EPC C for Leasehold Flats

Why Leasehold Flats Are a Different Problem

A freehold house landlord who owns the whole building can, in principle, instruct any measure they like on their own property. A leasehold flat landlord doesn't have that freedom. The building's structure — external walls, roof, windows in many blocks, communal areas, and often the heating system — is owned and controlled by the freeholder (sometimes called the superior landlord, particularly where there's a chain of ownership: freeholder → head lessee → sub-lessee → tenant).

The lease itself usually restricts what a leaseholder can do to the property without consent, and building-wide decisions — replacing windows across a block, insulating a shared roof, upgrading a communal boiler — are made collectively or by the freeholder, not by one flat owner acting alone. A landlord letting a single flat in a block of thirty has essentially no power to force any of that work to happen on their own timeline, no matter how much they might want to comply.

The Core Difficulty: Consent From a Superior Landlord

This is exactly the scenario government had in mind when describing the Third-Party Consent exemption in its response. The exemption is defined as covering situations where "consent from a relevant third-party, for example, tenant, superior landlord, planning authority, is not granted" — superior landlord refusal is named explicitly, not just implied.

What this means in practice for a leasehold landlord:

Important: Exemptions Are Measure-Specific, Not Property-Wide

This is the detail that trips people up. Registering a Third-Party Consent exemption because the freeholder refused external wall insulation doesn't exempt the whole flat from the standard — it exempts that specific measure. Any other measure that's genuinely within the leaseholder's control and doesn't require consent still needs to be installed (or separately exempted) to bring the flat as close to standard as possible within the £10,000 cost cap.

This makes it worth being precise about which measures actually need consent and which don't.

What's Realistically in Your Control — and What Isn't

Flat Position Often Narrows the Fabric Standard Anyway

A meaningful number of the standard fabric measures simply don't apply to most flats in the first place. Loft insulation only applies if you have loft access — true for top-floor flats, not for anyone below. Underfloor insulation only applies where the floor is exposed to the outside or unheated space, typically only ground-floor flats. Cavity wall insulation depends on the building's original construction, not something a leaseholder controls or often even knows without an assessment.

For a mid-floor flat in a block, this can mean draught-proofing and glazing are close to the entire realistic fabric measure list — which either makes reaching the fabric standard genuinely straightforward, or, if those measures are already in place and the flat still falls short, supports registering the All Relevant Improvements Made exemption (5 years) on the basis that no further recommendations apply.

The Communal Heating and Roof-Access Bind — and the Protection Built Into the Rules

Leasehold flats are disproportionately likely to hit a situation where both secondary-standard routes are blocked: the heating system is communal and outside the landlord's control, and there's no roof access for solar or battery storage because that's a freeholder-controlled communal area too.

Government has built a specific protection into the regulations for exactly this bind: if a property cannot receive any recommended measures towards the smart readiness standard within the cost cap, it is not then required to meet the heating system standard, and vice versa. In practice, a leaseholder who can show that neither secondary route is genuinely available to them — via Third-Party Consent exemptions covering both, or evidence that no measures apply — isn't left in an impossible position chasing a standard they have no power to meet.

Building the Evidence Trail

Because the Third-Party Consent exemption depends on being able to show a request was actually made and actually refused, it's worth treating this as a paper trail from the start rather than an afterthought:

• Put the request to the freeholder or managing agent in writing, specifying the exact measure (not a vague "can I make the flat more efficient" request).
• Keep the written refusal, or the lack of response after a reasonable period, as your evidence.
• Where a decision is made collectively (e.g. at an AGM or via a leaseholder vote on major works), keep minutes or correspondence showing the outcome.
• Re-request periodically if circumstances might change — a freeholder who refused external wall insulation five years ago may take a different view once the building's own compliance obligations (for example, under the Decent Homes Standard reforms or the freeholder's own net zero plans) start to bite.

Grandfather Rights: Often the Simplest Route for Flats

If the flat already scores, or can realistically reach, an EER of C on today's EPC before 1 October 2029, it's treated as compliant with the 2030 standard for as long as that EPC remains valid — up to 10 years — without any need to navigate the new dual-metric system, freeholder consent chains, or exemption paperwork at all. Given how much of the leasehold problem is about process (who has to agree to what) rather than just cost, locking in compliance under the system landlords already understand is often the least stressful option where it's achievable. Read our full grandfather rights guide.

A Practical Example

A landlord owns a second-floor flat in a 1930s purpose-built block: no loft access, no exposed floor, single-glazed metal-framed windows that the lease reserves to the freeholder, and a communal gas boiler serving the whole block.

1. Draught-proof what's within the flat itself — internal doors, gaps around skirting, letterboxes.
2. Formally request window replacement from the freeholder/managing agent in writing. If refused (common where uniform elevations are a lease requirement), register a Third-Party Consent exemption for that measure.
3. Reassess fabric performance — with limited measures available to begin with, and one now exempted, the flat may already be at or near the fabric standard, or qualify for All Relevant Improvements Made.
4. For the secondary standard: request permission for solar/battery access to the roof (likely refused, communal area) and confirm the boiler is communal and outside the landlord's control (heating system route unavailable). Register the relevant exemptions for both.
5. Fall back on a smart meter within the flat as the one genuinely available smart-readiness measure, if the tenant is willing.
6. Keep all correspondence — it's the evidence base for every exemption registered.

Key Takeaways

• The Third-Party Consent exemption explicitly covers superior landlord refusal — this is the primary tool for leasehold compliance.
• Exemptions are measure-specific: a blocked measure doesn't exempt the whole flat, only that measure.
• Many flats naturally have fewer applicable fabric measures than houses, which can work in a leaseholder's favour.
• Where both the smart readiness and heating system routes are genuinely blocked, the regulations don't force a landlord to meet either.
• Written requests and refusals are the evidence the exemption depends on — start documenting early.
• Reaching EER C before 1 October 2029 sidesteps the whole new-metrics/consent process for flats where it's achievable.

Frequently Asked Questions