Methodology

What is MEES?

The Minimum Energy Efficiency Standards (MEES) regime is set out in the Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 - statutory instrument SI 2015/962 - made under section 49 of the Energy Act 2011. It prohibits landlords from letting in-scope non-domestic property below a minimum EPC rating, with civil penalties enforced by local weights and measures authorities.

Scope: non-domestic privately rented property in England and Wales. Scotland and Northern Ireland operate separate regimes outside the scope of this snapshot.

Band E minimum (current law since 2018-23)

Band E became the minimum rating for new lettings of non-domestic property on 1 April 2018 and extended to all existing lettings on 1 April 2023. Letting at sub-E (F or G) is unlawful unless a valid exemption is registered on the PRS Exemptions Register (typical exemptions: 7-year payback test, third-party consent refused, devaluation, listed-building consent refused).

The snapshot flags any property with an on-record EPC of F or G as a Band E breach.

Fine formula - regulation 39 of SI 2015/962

Civil penalties for renting out a sub-standard non-domestic property are set in regulation 39. They are calculated against the rateable value (RV) of the property, banded by breach duration:

short_breach (< 3 months):
  fine = clamp(rateable_value × 10%, min=£5,000, max=£50,000)

long_breach (≥ 3 months):
  fine = clamp(rateable_value × 20%, min=£10,000, max=£150,000)

The £150,000 long-breach cap is the regulatory ceiling. There is no £30,000 flat-rate alternative - any source quoting a flat £30,000 maximum is wrong.

A separate £5,000 publication penalty (regulation 39(3)) and £1,000 /£2,000 register-related penalties may also apply but are not modelled in this MVP snapshot.

EPC data source

We query the Open Data Communities EPC API published by the Ministry of Housing, Communities and Local Government (MHCLG, now DLUHC). The lookup uses the postcode you provide, narrowed by the optional address line where supplied.

If no EPC is on record the property is reported with band unknown - we never guess. Where a rateable value is missing we fall back to a sector median; the calculator labels the figure clearly so you can replace it with your own figure on the PDF report.

Regulation references

• Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 - SI 2015/962 (the "MEES Regulations").
• Energy Act 2011, section 49 - primary enabling power.
• Regulation 39, SI 2015/962 - civil penalty formula (10% / 20% of rateable value with the £5K-£50K and £10K-£150K bands).
• Non-Domestic PRS Minimum Standard consultation - proposed Band C 2028 step-up, subject to legislative confirmation.
• Open Data Communities EPC API - MHCLG / DLUHC (commercial register for non-domestic property).

Methodology FAQs

Which regulation underpins MEES?

The Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015, statutory instrument SI 2015/962, made under the Energy Act 2011. It applies to non-domestic privately rented property in England and Wales. Scotland and Northern Ireland have separate regimes.

When did the Band E minimum take effect?

Band E became the minimum rating for new lettings of non-domestic property on 1 April 2018, and extended to all existing lettings on 1 April 2023. Sub-Band E (F or G) lettings are now prohibited unless a valid exemption is registered on the PRS Exemptions Register.

Is Band C 2028 already law?

No. Band C 2028 is proposed under the government's Non-Domestic Private Rented Sector consultation. It is subject to legislative confirmation and has not yet been enacted. We surface it as a forward-looking risk indicator only - it informs portfolio planning, not present-day enforcement.

How exactly is the fine calculated?

Per regulation 39 of SI 2015/962: short breach (under 3 months) = 10% of the rateable value, with a £5,000 floor and £50,000 ceiling. Long breach (3 months or more) = 20% of the rateable value, with a £10,000 floor and £150,000 ceiling. There is no £30,000 flat-rate alternative; the £150,000 long-breach cap is the regulatory ceiling.

Where do EPC bands come from?

We look up each property by postcode (and optional address line) via the Open Data Communities EPC API published by MHCLG (Ministry of Housing, Communities and Local Government, now DLUHC). If a property has no on-record EPC the snapshot flags it as 'unknown' rather than guessing. Domestic and non-domestic registers are queried separately.