Summary

MEES is the floor for energy efficiency in rented homes. Its logic is simple: the worst-performing properties (EPC F and G) are expensive to heat, often cold and damp, and disproportionately occupied by lower-income tenants — so the law bans letting them unless the landlord either improves them or has a valid reason not to. For tradespeople in insulation, heating, glazing and electrical retrofit, MEES is a steady driver of work, because every sub-E rental either needs improving or evidencing as exempt.

The mechanics centre on the EPC (Energy Performance Certificate) and its A–G banding. Since April 2018 a landlord could not grant a new tenancy on a property rated F or G, and since April 2020 that prohibition extended to continuing to let existing tenancies. To comply, a landlord must make the property at least band E — but they are not asked to spend without limit. A cost cap of £3,500 including VAT applies: the landlord must install whatever relevant improvements that money buys (using funding to top up where available), and if the property still cannot reach E within the cap, they register a "high cost" exemption.

The future standard is no longer in flux in the way it once was. After being dropped and revived more than once, the move from E to C for the private rented sector was confirmed as government policy in the Warm Homes Plan (21 January 2026): new tenancies must meet EPC C from 2028 and all tenancies from 2030, with the cost cap raised to £10,000 and penalties rising to £30,000 per property/breach from 2030. A previously floated interim milestone for 2027 will not be taken forward. The current legal minimum today remains band E — the 2028/2030 EPC C dates are confirmed future law, not yet in force, so advise landlords on today's E duty while planning for the C deadlines.

Key Facts

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Aspect Current rule (domestic)
Minimum EPC band E
New tenancies Since 1 April 2018
All existing tenancies Since 1 April 2020
Cost cap £3,500 inc VAT (incl. funding)
Exemption register PRS Exemptions Register, 5-year validity
Max penalty (domestic) Up to £5,000
Non-domestic minimum E All leases since 1 April 2023; penalties £10,000–£150,000
Confirmed future minimum EPC C (PRS) — new tenancies 2028, all tenancies 2030; £10,000 cap; £30,000 max penalty from 2030

Detailed Guidance

What MEES actually prohibits

It is unlawful to let a domestic property covered by MEES if it has a valid EPC of band F or G, unless a valid exemption is registered. "Let" covers both granting a new tenancy and continuing an existing one. The property must be brought up to at least band E, evidenced by a new EPC, or an exemption must be registered before letting continues. The duty falls on the landlord.

The £3,500 cost cap and funding

DOMESTIC MEES IMPROVEMENT LOGIC
-------------------------------
Property EPC is F or G?
   -> Identify EPC recommended improvements (cheapest effective first)
   -> Install relevant improvements UP TO £3,500 inc VAT
        - count any third-party funding (grants, ECO, local schemes)
          toward the cap
   -> New EPC reaches E?  YES -> compliant, keep records
                          NO  -> register "all relevant improvements
                                 made" exemption (5 years)
   -> Cheapest route to E already exceeds £3,500?
        -> register "high cost" exemption with 3 quotes (5 years)

The cap means a landlord is never required to spend more than £3,500 (including any grant money) to comply — but they must spend up to it on the recommended measures. Where grants like ECO or local schemes are available, they count toward (and stretch) the cap.

Exemptions in detail

Exemptions must be registered on the PRS Exemptions Register with evidence; they are not automatic:

Most exemptions last 5 years; the property must be re-assessed after that.

Typical improvements that move the rating

The EPC recommendations drive the work, but common cost-effective measures are:

A retrofit assessor or the EPC recommendation report should prioritise measures by cost-effectiveness.

The move to EPC C — now confirmed policy

After being announced, scrapped and revived more than once, the move from E to C for the PRS was confirmed in the Warm Homes Plan published 21 January 2026: new tenancies must meet band C from 2028, and all tenancies from 2030. The cost cap rises to £10,000 including VAT (from £3,500), and the maximum penalty rises to £30,000 per property/breach (from £5,000) once the C standard takes effect in 2030. A previously proposed interim milestone for 2027 will not be taken forward. Separately, government intends to replace the current single-metric EPC with a multi-metric assessment from around late 2026, which is expected to affect how gas-heated properties are rated. The current legal requirement today remains band E — the 2028/2030 C dates are confirmed future law, not yet in force. When advising landlords, state the live E duty plainly and use the confirmed 2028/2030 dates and £10,000 cap when discussing what's coming.

Frequently Asked Questions

What EPC rating does a rented property legally need?

At least band E. Since April 2018 a landlord could not start a new tenancy on a property rated F or G, and since April 2020 the rule applies to all let properties — including continuing existing tenancies. Letting a sub-E property without a registered exemption is unlawful and can attract financial penalties up to £5,000. A confirmed future tightening to band C takes effect for new tenancies from 2028 and all tenancies from 2030 (Warm Homes Plan, January 2026) — not yet the current legal minimum, but no longer just a proposal.

How much does a landlord have to spend to comply?

Up to a £3,500 cost cap including VAT (with any third-party funding such as grants counting toward that cap). The landlord must install whatever recommended improvements that money buys to try to reach band E. If the cheapest route to E exceeds £3,500, they register a "high cost" exemption; if they have spent up to the cap and the property is still below E, they register an "all relevant improvements made" exemption. They are never required to spend beyond the cap.

What is the PRS Exemptions Register?

It is the national register where landlords must record any MEES exemption before letting a sub-E property. Exemptions are not automatic — the landlord must register the relevant exemption type with supporting evidence (e.g. three quotes for a high-cost exemption, an expert report for wall-insulation devaluation). Most exemptions are valid for five years, after which the property must be re-assessed; the temporary new-landlord exemption lasts six months.

Does MEES apply to commercial property?

Yes, there is a parallel non-domestic MEES. The minimum E standard applied to new lettings of non-domestic property from April 2018 and to all let non-domestic property from 1 April 2023, with much higher penalties (up to £150,000). Non-domestic MEES has its own assessment, cost considerations and exemptions, and is also expected to tighten over time — confirm the current non-domestic requirements separately from the domestic rules.

Is the EPC C requirement now law?

Not yet in force, but it is now confirmed policy rather than a proposal. The legal minimum for the private rented sector today remains band E. The government's Warm Homes Plan (21 January 2026) confirmed that EPC C will become mandatory for new tenancies from 2028 and all tenancies from 2030, with the cost cap rising to £10,000 and penalties rising to £30,000. A previously floated interim 2027 milestone was dropped. Advise landlords to comply with the live E requirement today while planning for the confirmed 2028/2030 C deadlines.

Regulations & Standards