The short answer is band E. To legally let a residential property in England and Wales in 2026, it must hold a valid Energy Performance Certificate (a document showing a property’s energy efficiency rating, produced by an accredited domestic energy assessor) showing a rating of at least band E. Properties rated band F or band G cannot be let without a valid exemption registered on the government’s Private Rented Sector Exemptions Register.
That is the current position. It is about to change. From 1 October 2030, the minimum rises to band C. The gap between band E and band C is not trivial. For many properties, particularly older ones with solid walls or uninsulated roofs, crossing that gap requires real capital investment. And the window to plan that investment, and to secure a band C certificate under the current assessment methodology rather than the new one coming in from late 2027, is shorter than most portfolio landlords have accounted for.
This guide covers what the current rules require, what the rules require from October 2030, when a certificate needs to be in place, what exemptions are available, and what the planning timeline looks like for a portfolio with properties spread across different bands.
1. The Current Minimum: Band E for All Tenancies
The Minimum Energy Efficiency Standards, which are the regulations that set the floor for energy performance in privately rented homes, were introduced under the Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015.
They came into force in stages:
April 2018: New tenancies and tenancy renewals had to meet a minimum Energy Performance Certificate rating of band E.
April 2020: The requirement extended to all existing tenancies. From that point, the Minimum Energy Efficiency Standards applied to all let properties, whether the tenancy had started before or after the rules came in.
2026 (current position): Band E remains the legal minimum. Properties at band F or G cannot be let without a registered exemption. Properties at band E or above are compliant with the current rules.
2. What an Energy Performance Certificate Is and How Ratings Work
An Energy Performance Certificate is a document produced by an accredited domestic energy assessor following an inspection of the property. It shows the property’s energy efficiency rating on a scale from band A (most efficient) to band G (least efficient), and gives an estimate of annual energy running costs based on standardised assumptions about occupancy and use.
The certificate also includes a list of specific recommended improvements with estimated costs and projected rating uplifts. That improvement list is the starting point for any landlord planning upgrade work.
Ratings map to numerical scores calculated using the Standard Assessment Procedure, which is the government’s methodology for estimating energy performance:
| Band | Score range | Description |
| A | 92 or above | Highest efficiency |
| B | 81 to 91 | Very efficient |
| C | 69 to 80 | Efficient |
| D | 55 to 68 | Average |
| E | 39 to 54 | Below average |
| F | 21 to 38 | Poor |
| G | 1 to 20 | Least efficient |
A property at band E with a score of 54 is one point below band D. A property at band E with a score of 39 is at the bottom of the band and likely to require significantly more work to reach band C. Knowing the actual score, not just the band letter, is important when planning improvement work.
3. When a Certificate Must Be in Place
A valid Energy Performance Certificate must exist before a property is marketed or let. The specific triggers are:
Before marketing. A landlord must have a valid certificate before advertising the property, whether online, through an agent, or in print. Letting agents and property platforms are under their own obligations and will not list a property without a current certificate.
At the start of each new tenancy. A copy of the certificate must be provided to the new tenant at the start of the tenancy. The certificate covers all lettings during its ten-year validity period, so a single certificate can serve multiple successive tenancies without renewal.
Not required during a continuing tenancy. If a certificate expires while the same tenant is still living in the property and there are no plans to re-let or market the property, a new certificate is not legally required mid-tenancy.
After significant improvements. There is no legal requirement to commission a new certificate after energy efficiency improvements have been made unless marketing or a new tenancy is being started.
4. How Long a Certificate Remains Valid
An Energy Performance Certificate is valid for ten years from the date it was issued. A certificate issued in 2016 expired in 2026. A certificate issued in 2020 expires in 2030.
A new certificate can be commissioned at any point, for example after improvement works, and the new certificate replaces the old one from the date of issue. The ten-year validity period starts again from the new certificate date. You can check the current certificate for any property on the government’s open EPC register.
5. What Happens if a Property Is Rated Below Band E
Letting a property at band F or G without a registered exemption is a breach of the Minimum Energy Efficiency Standards. Under current rules, local authorities can issue financial penalties per property and per breach.
The current penalty structure:
- Letting a non-compliant property for less than three months: up to £2,000
- Letting a non-compliant property for three months or more: up to £4,000
- Providing false or misleading information on the exemptions register: up to £1,000
- Failure to comply with a compliance notice: up to £2,000
The total maximum penalty per property under current rules is £5,000. Details of breaches can be published publicly for at least twelve months.
If a property falls below band E, the options are: improve the property to reach band E, spend up to the cost cap on improvements and register an exemption on the Private Rented Sector Exemptions Register if band E still cannot be reached, or stop letting the property until it is compliant.
6. Exemptions Available Under Current Rules
Where a property genuinely cannot be improved to meet band E, or where the cost of doing so exceeds the current cost cap of £3,500 including value added tax, an exemption can be registered on the Private Rented Sector Exemptions Register. The exemption must be registered before the property is let. Only a registered exemption protects a landlord from penalties.
Exemptions are not transferable on sale. If a property changes hands, the new landlord must register their own exemption if one is needed.
The main exemption categories under the current rules are:
High-cost exemption. The cheapest recommended improvement measure costs more than £3,500 including value added tax. Three quotations from different installers must be uploaded to the register as evidence.
All relevant improvements made exemption. All measures listed in the Energy Performance Certificate and suitable for the property have been installed. The property still fails to reach band E. Evidence must be retained and uploaded.
Wall insulation exemption. The only remaining improvement options involve wall insulation, and an expert opinion confirms that installing it would negatively affect the structure, character, or fabric of the building. Particularly relevant for older properties and listed buildings.
Third-party consent exemption. The landlord has made reasonable efforts to obtain consent for the required works from a tenant, mortgage lender, superior landlord, freeholder, or planning authority, and that consent has been refused or made conditional in a way the landlord cannot reasonably meet.
Property devaluation exemption. An independent surveyor registered with the Royal Institution of Chartered Surveyors has confirmed in writing that the required improvement works would reduce the market value of the property by more than five percent.
Temporary new landlord exemption. A landlord who has recently and unexpectedly become responsible for a property has six months to bring the property to the required standard or register a longer-term exemption.
All exemptions last five years, after which the position must be reassessed.
7. The 2030 Deadline: Minimum Rising to Band C
The government confirmed on 21 January 2026, as part of the Warm Homes Plan, that the minimum Energy Performance Certificate rating for private rented properties in England and Wales will rise to band C from 1 October 2030. This applies to all tenancies, whether new or pre-existing.
Key details confirmed in the January 2026 announcement:
Compliance deadline: 1 October 2030 for all private rented tenancies.
Proposed new cost cap: £10,000 per property, replacing the current £3,500 cap. Where a property’s market value is below £100,000, the cap is the lower of £10,000 or ten percent of the property’s market value.
Expenditure from 1 October 2025 counts. Any qualifying improvement work carried out from that date onwards can be included in the total spent toward the cost cap.
Short-term lets are currently excluded. Properties let on short-term arrangements are not required to meet the band C standard by 2030. This position is under review.
Proposed penalty for non-compliance from October 2030: up to £30,000 per property, up from the current £5,000 maximum. This is a policy intention, not yet enacted law. Final legislation is expected in 2027.
8. The New Home Energy Model: How the Assessment Changes
The way Energy Performance Certificates are calculated is changing before the 2030 deadline arrives, and this affects planning decisions significantly.
The current Standard Assessment Procedure uses estimated running costs as the primary measure of energy performance. From late 2027, new certificates will be issued under the Home Energy Model. This new methodology replaces the single running-cost rating with four separate metrics:
Fabric performance. How well the building retains heat through its walls, roof, floor, windows, and doors. This becomes the non-negotiable primary standard.
Heating system performance. The carbon intensity and efficiency of the heating system. A property can meet this metric either through a qualifying heating system, such as a heat pump, or by meeting the smart readiness metric instead.
Smart readiness. The property’s capacity to generate or manage its own energy, principally through solar photovoltaic panels, battery storage, or similar technology.
Energy cost. An estimated annual energy bill, shown as information rather than as a compliance metric.
The practical consequence is that many properties which currently achieve band C under the Standard Assessment Procedure may not achieve an equivalent rating under the Home Energy Model. A property with an efficient gas boiler that currently scores 70 may score lower under the new methodology if its fabric performance is weak.
9. The October 2029 Window: Why It Is the Real Planning Deadline
Properties that achieve band C under the current Standard Assessment Procedure before 1 October 2029 will be treated as compliant with the new band C standard until their certificate expires. If that certificate was issued in 2027, it remains valid until 2037.
Properties that do not hold a band C certificate under the current system before October 2029 will need to be assessed and upgraded against the Home Energy Model metrics. Those metrics are expected to be harder to meet for many existing properties.
The difference in planning terms is significant:
Certificate obtained before October 2029 under current rules: locked into compliance for up to ten years, using a familiar methodology, with known upgrade costs.
Certificate obtained after October 2029 under the Home Energy Model: assessed against new metrics that may require heating system changes or renewable energy technology rather than insulation alone, with less certainty about the total cost.
For portfolio landlords, October 2029 is the practical target, not October 2030. Completing works and obtaining a new certificate before October 2029 provides compliance under the familiar system and avoids the uncertainty of the new methodology.
10. What the 2030 Change Means for Properties Currently at Band D or E
Band D properties (Standard Assessment Procedure score 55 to 68)
Band D is a legally lettable band today. For most band D properties with cavity walls and partial insulation, a targeted programme of loft insulation, cavity wall insulation if not already present, and heating controls will typically produce enough points to reach band C. Total cost often falls between £1,500 and £4,000, well within the £10,000 cap.
The risk is leaving this work until 2029 or 2030. Contractor availability will tighten significantly as the deadline approaches, and the window to secure a certificate under the current methodology closes in October 2029.
Band E properties (Standard Assessment Procedure score 39 to 54)
Band E is the current legal minimum. For properties with cavity walls and accessible roof voids, moving from band E to band C may cost £3,000 to £6,000. For solid-wall properties, external wall insulation typically costs £8,000 to £20,000 for a standard house, or internal wall insulation at £5,000 to £15,000. These are the works most likely to exceed the £10,000 cost cap.
A band E solid-wall property that cannot reach band C within the cap is a candidate for the cost cap exemption. The decision to pursue improvement versus exemption should be made now, not in 2029.
Band F and G properties
Already below the current legal minimum. Letting without a registered exemption is a breach of the existing Minimum Energy Efficiency Standards today. These properties should be the first priority in any portfolio.
11. Penalties: Current and Proposed
Current penalties (failing to meet band E without a registered exemption)
The maximum total penalty per property under current rules is £5,000. This is made up of up to £4,000 for letting a non-compliant property for three months or more, up to £2,000 for failure to respond to a compliance notice, and up to £1,000 for providing false or misleading information on the exemptions register.
Local authorities conduct proactive audits rather than relying solely on tenant complaints. Breaches can be published publicly for twelve months.
Proposed penalties from October 2030
Up to £30,000 per property. This is the policy figure from the January 2026 announcement. Final legislation is expected in 2027.
12. Four Steps for Landlords with a Mixed-Band Portfolio
Step 1: Pull every certificate from the government register
The government’s open Energy Performance Certificate register is searchable by postcode or address. Pull the current certificate for every property in the portfolio. Note the band, the numerical score, the wall construction type listed, and the specific improvement recommendations with estimated costs.
Group properties into three categories: already at band C or above (no immediate action needed), band D with cavity walls and accessible loft (improvable to band C within cap, prioritise before 2029), and band E or below or with solid walls (higher cost, individual professional assessment needed).
Step 2: Address band F and G properties immediately
Any property below band E is already in breach of the current rules unless a valid exemption is registered. This is not a 2030 problem. Deal with these properties first.
Step 3: Plan and execute band D and easy band E upgrades between now and late 2028
Starting in 2026 or 2027 spreads the work over voids, avoids cost escalation as the 2030 deadline drives up contractor demand, and locks in band C certification under the current Standard Assessment Procedure before the Home Energy Model arrives.
A fabric-first order of priority: loft insulation to 270mm depth first, then cavity wall insulation if not present, then heating controls. Boiler replacement only where the existing boiler is substantially inefficient.
Step 4: Assess solid-wall and harder band E properties individually
These require a conversation with an accredited domestic energy assessor before any money is spent. Some will be improvable within the £10,000 cap. Others will qualify for a cost cap exemption. Some will prompt a harder question about whether the ongoing economics of the property justify the investment at all.
Frequently Asked Questions
Band E. All privately rented residential properties in England and Wales must hold a valid Energy Performance Certificate showing at least band E under the Minimum Energy Efficiency Standards. Properties rated band F or G cannot be let without a registered exemption.
Yes. Band D is above the current minimum of band E and is fully compliant for letting in 2026. A band D property will need to reach band C before October 2030.
From 1 October 2030, the minimum rises to band C for all private rented tenancies in England and Wales. Properties at band D or E will not be legally lettable after that date without a registered exemption on the Private Rented Sector Exemptions Register.
No, provided the existing certificate is still within its ten-year validity period. A new certificate is only required when the existing one has expired and a new tenancy or marketing campaign is starting, or when a new certificate is voluntarily commissioned after improvement works.
Register an exemption on the Private Rented Sector Exemptions Register. Both the high-cost exemption and the all relevant improvements made exemption require documentary evidence and must be registered before the property is let.
It depends on when the certificate was issued and what band it shows. A certificate showing band C or above, issued before 1 October 2029, will be treated as compliant with the new band C standard until that certificate expires.
The Home Energy Model replaces the Standard Assessment Procedure as the methodology for calculating Energy Performance Certificate ratings. The government moved its launch to the second half of 2027. Certificates issued under the current Standard Assessment Procedure before October 2029 remain valid until they expire.
Under current rules, the maximum total penalty per property is £5,000. From October 2030, the proposed maximum penalty for failing to meet band C without a registered exemption rises to £30,000 per property. Final legislation is expected in 2027.
The government’s open register is searchable by postcode or property address. It shows the current band, the numerical score, and the specific improvement recommendations with estimated costs.
For England and Wales, it applies to assured tenancies, regulated tenancies, and domestic agricultural tenancies. Short-term lets are currently excluded from the 2030 requirement, though this is under review. Scotland and Wales have their own separate regulatory frameworks.
Published May 2026. Last reviewed May 2026. For information only. The 2030 band C requirement and proposed £30,000 penalty are policy intentions confirmed in the January 2026 Warm Homes Plan. Final legislation is expected in 2027. Verify current requirements at GOV.UK before making compliance decisions.
