Energy Performance Certificates: the UK guide for 2026

An Energy Performance Certificate is a regulated document that rates how energy-efficient a building is, on a scale from A (most efficient) to G (least efficient). It estimates running costs, sets out the carbon emissions associated with that energy use, and includes a list of cost-effective improvements with the impact each one would have on the rating.

EPCs were introduced in phases from 2007 and were fully implemented across all property types by autumn 2008, under the Energy Performance of Buildings (England and Wales) Regulations 2012 and parallel regimes in Scotland and Northern Ireland. The framework derives from the EU Energy Performance of Buildings Directive, retained in UK law after Brexit. Every certificate produced is lodged on a national register: in England and Wales, find-energy-certificate.service.gov.uk; in Scotland, the Scottish EPC Register; in Northern Ireland, the NI EPC Register.

What an EPC is not: it is not a structural survey, not a homebuyer report, and not an audit of actual past energy bills. It is a standardised model — the assessor inputs measured property data into approved software (currently SAP for domestic dwellings, SBEM for non-domestic), and the software computes the rating against a national reference. That standardisation is the point: every EPC produced anywhere in the UK is comparable to every other.

The key data points an EPC contains:

• The current energy efficiency rating (band A–G plus a numeric SAP score 1–100+)
• The potential rating if recommended improvements are installed
• The estimated annual cost of heating, hot water, and lighting
• The estimated CO₂ emissions in tonnes per year
• A prioritised list of recommended improvements with indicative cost and the rating uplift each would deliver
• Property attributes: floor area, construction type, heating system, glazing type, ventilation

The certificate sits on the public register and can be looked up by anyone with the address — meaning it functions as a public information document, not a private survey.

[Internal link: see our /ratings guide for what each band means in practice]

The A–G rating maps onto a numeric SAP score for domestic properties:

For non-domestic properties an additional A+ band exists, denoting buildings with net energy generation (e.g. a building with sufficient on-site solar to be a net exporter).

What the bands mean in practice, using the latest official figures:

• Median EPC score in England: 69 — band C — based on records from the 10 years to March 2025 (ONS)
• Median EPC score in Wales: 68 — band D — same period and source
• Regional spread is narrow: London, the East of England, and the South East sit at median 70 (band C); Yorkshire and the Humber sits at 68 (band D)
• Around 71% of England's housing stock and 67% of Wales's housing stock has an EPC on file, per ONS analysis matching the register against Census 2021 data

The numeric score matters for landlords specifically. A property at the bottom of band E (a SAP 39) is legally lettable today; a property at the top of band E (a SAP 54) is materially more efficient but in the same band — so two properties with the "same rating" can have very different running costs. When the regime moves to band C minimum (see Section 4 below), a SAP 68 property — currently top-of-D — will need to be uplifted by just two SAP points to comply, while a SAP 39 property will need to be uplifted by 30. The numeric score is what determines the cost of compliance.

You must have a valid EPC commissioned and made available to prospective buyers or tenants in three triggering circumstances:

1. You are constructing a new building — an EPC is part of the building regulations sign-off process, typically commissioned by the builder or developer
2. You are selling a property — an EPC must be in place by the time the property is marketed
3. You are letting a property — the same rule applies; the EPC must be available to a prospective tenant before a tenancy is agreed

There are exemptions for a defined set of building types: places of worship, listed buildings where compliance would unacceptably alter character, temporary buildings (less than two years' planned use), holiday homes rented for less than four months a year, stand-alone non-residential buildings under 50m² floor area, buildings due for demolition, and industrial sites with low energy demand. The full list and the registration process for landlord exemptions sits on the Private Rented Sector Exemptions Register.

Penalties:

• Selling without an EPC: a fixed penalty of £200 per dwelling, enforced by trading standards
• Letting without an EPC: a penalty of up to £5,000 per breach
• Letting in breach of MEES (a property below band E without a registered exemption): a penalty of up to £5,000 today, rising under reform proposals

These are enforcement minimums and trading standards officers can stack penalties by breach. A landlord with multiple non-compliant properties can rack up tens of thousands in fines from a single audit.

EPCs are valid for 10 years from the date of lodgement on the register. They do not expire on transaction; an EPC issued in 2018 is valid until 2028 regardless of how many times the property has changed hands in between. A new EPC is only required when the existing one expires, when significant works are completed (e.g. an extension materially changing the floor area or heating system), or when the property owner wants an updated rating to reflect improvements made.

[Internal link: full process at /how-to-get]

The EPC system as it exists today is being reformed. This matters for every property owner in the UK because the rating you get under the new regime will use a different methodology, different metrics, and (for landlords) carry different compliance obligations.

What is changing. The Department for Energy Security and Net Zero (DESNZ) has been running a public consultation on the Home Energy Model: Energy Performance Certificates methodology, which closed on 18 March 2026. The Home Energy Model (HEM) replaces the existing SAP methodology for domestic EPCs and produces three new headline metrics in addition to the overall rating:

1. Fabric performance — how well the building envelope (walls, roof, floor, windows) retains heat. This is the metric most influenced by insulation
2. Smart readiness — the building's capacity to integrate with smart energy systems (heat pumps with smart controls, time-of-use tariffs, demand response)
3. Heating system efficiency and emissions — the performance of the heating plant, isolated from fabric performance, with explicit accounting for fossil-fuel vs low-carbon systems

The motivation for unbundling: under the existing single-score SAP, a poorly insulated home with a very efficient gas boiler can score similarly to a well-insulated home with an electric resistance heater. The new metrics let policy targets (and minimum standards) be set against the right lever. Insulation policy gets the fabric metric. Heat pump policy gets the heating system metric. Smart-grid policy gets the smart readiness metric.

When it lands. The original target was to launch the reformed EPC regime in October 2026. On 17 March 2026 — the day before the consultation closed — DESNZ confirmed a delay: the new regime will now launch in the second half of 2027. The rationale was that the implementation timeline was too aggressive given assessor training and software readiness. A revised launch date and shared implementation plan are due to be agreed with industry by summer 2026.

The MEES uplift. The most consequential change for landlords is not the methodology — it is the rise in the Minimum Energy Efficiency Standard from EPC band E to EPC band C. The government's proposed timeline:

• 2027: Legislation raising MEES for privately rented homes comes into force. New tenancies in the private rented sector must meet the new standard
• 2029: All existing tenancies must comply. Landlords using the grandparenting clause must have an EPC scoring band C or higher against the existing Energy Efficiency Rating by this point
• Cost cap: The current £3,500 spend cap is proposed to rise to £15,000 per property to fund compliance works

The 2027 regulation deliberately sits before the launch of the reformed EPC methodology in late 2027, which creates a transitional rule. The government has proposed that privately rented homes that achieve EPC band C against the existing SAP-based EPC, before the new methodology is introduced, will be considered compliant with the higher MEES until that existing EPC expires. Properties that remain below band C through to the methodology change will need a fresh EPC under the new HEM regime, and the cost of that new assessment counts toward the £15,000 cap.

The practical reading for landlords:

• If your property is band C or above today: you are already compliant with the proposed 2027 standard. Lodge the existing EPC and you are grandfathered until it expires
• If your property is band D or E today: you have a window before 2027 (new tenancies) or 2029 (all tenancies) to install measures and re-rate. Doing this against the current SAP-based EPC is generally cheaper and more predictable than waiting for the HEM-based regime
• If your property is band F or G today: you cannot legally let it now without a registered exemption. Compliance work is required immediately

The Renters' Rights Act overlay. Passed in 2025, the Renters' Rights Act ends Section 21 "no fault" evictions and introduces a new tenancy framework affecting 11 million private renters and 2.3 million landlords. The MEES uplift sits on top of this: a landlord who cannot evict a tenant on no-fault grounds will need to plan compliance works around the tenant's continued occupation, adding complexity to retrofit scheduling. This is the implementation problem the £15,000 cap and the 2029 backstop are designed to solve.

[Internal link: full reform analysis at /reform-2027; landlord-specific MEES guide at /landlords-mees]

Only an accredited Domestic Energy Assessor (DEA) can produce a residential EPC. For non-domestic buildings the equivalent qualification is a Non-Domestic Energy Assessor (NDEA), with separate Level 3, 4, and 5 accreditations covering increasingly complex building types. Assessors must be registered with one of the government-approved accreditation schemes:

• Elmhurst Energy
• Stroma Certification
• ECMK
• Sterling Accreditation
• Quidos
• BRE

Accreditation bodies hold the assessors to a code of conduct, run quality audits on a sample of lodged certificates, and can suspend or revoke accreditation for poor practice. Always confirm an assessor's accreditation status before booking.

The process:

1. Booking. Source an assessor by postcode through the accreditation bodies above, an aggregator (HomeOwners Alliance, fast-epc, myconstructor), or directly through a local firm. Compare at least two quotes
2. The visit. A residential EPC inspection takes 30 to 60 minutes. The assessor measures floor area, records construction details (wall type, roof construction, glazing), notes the heating system and hot water provision, photographs the boiler and meter, and asks about loft insulation and any installed renewables
3. The calculation. The assessor enters the data into approved software (RdSAP for existing domestic dwellings, full SAP for new builds, SBEM for non-domestic). The software computes the rating against the national reference
4. Lodgement. The certificate is uploaded to the national register within a few working days. Lodgement on the register is the moment the EPC becomes legally valid
5. Delivery. The owner receives a copy by email and can retrieve the certificate from the register at any time using the property address or the unique reference number

For landlords with portfolios of similar properties (e.g. a block of identical flats), assessors can offer reduced rates for batch assessments — the data entry overhead per unit drops dramatically once one full assessment is done.

[Internal link: detailed accreditation guide at /how-to-get]

There is no fixed government price for an EPC. Pricing is competitive and varies by property size, complexity, region, urgency, and assessor.

Typical 2026 ranges for domestic EPCs:

Typical 2026 ranges for commercial EPCs:

Regional variation for domestic EPCs:

London prices reflect higher operating costs for assessors. Rural areas can be more expensive than the headline figure suggests because assessors price in travel time. Booking a single assessor to do multiple properties on the same trip (a row of let flats, a small portfolio) is the single most effective way to bring the per-unit price down.

What is included in the quoted price. A standard domestic EPC quote covers: the on-site survey, software-based calculation, lodgement on the national register, the official PDF certificate, and the energy efficiency recommendations report. It does not include any post-assessment advisory work, follow-up inspections after improvements, or a structural survey. If you want a re-rating after installing measures, that's a separate assessment at a separate fee.

Who pays. For sales, the seller pays. For lets, the landlord pays — and under the Tenant Fees Act 2019 cannot pass the cost to the tenant. For new builds, the developer typically commissions the EPC as part of the building regulations process; the cost is rolled into the build budget.

A note on very cheap EPCs. Quotes significantly below market (sub-£40 for a standard property, sub-£100 for commercial) are usually a flag for one of three things: an under-inspected assessment that misses insulation evidence, an assessor working below the rate at which they can sustain proper quality assurance, or a lead-generation funnel where the EPC is a loss-leader for related upselling. The certificate is still legally valid if lodged correctly, but a rushed assessment can produce a lower rating than the property deserves — and that lost rating costs the seller or landlord far more in the transaction than the £20 saved on the assessment.

[Internal link: full cost calculator at /cost]

The EPC certificate is a four-page (or longer for complex buildings) PDF document. The information sits in five blocks:

Block 1: Headline ratings. The current and potential energy efficiency ratings, side by side, on the A–G scale. The "potential" rating is what your property would achieve if all the recommended cost-effective improvements in Block 4 were installed. The gap between current and potential is your improvement headroom.

Block 2: Energy use and cost estimates. The estimated annual cost of heating, hot water, and lighting, broken down by category. Estimates assume standard occupancy patterns (the model does not know how many people live in your home or how warm you keep it). Treat the figures as comparative — useful for comparing one property against another, less useful as a forecast of your actual bills.

Block 3: Carbon emissions. Estimated tonnes of CO₂ per year. This is the metric that matters for net-zero policy and increasingly for green mortgage product eligibility — major lenders are pricing CO₂ emissions into mortgage rates for energy-inefficient homes.

Block 4: Recommended improvements. A prioritised list of measures, each with three numbers: indicative cost, indicative annual saving, and the rating uplift in numeric SAP points. Sorted by cost-effectiveness (lifetime saving per £ spent). This is the single most useful page of the document for any owner planning works.

Block 5: Property attributes. The technical data the assessor recorded: floor area, construction type by element (wall, roof, floor), heating system, hot water source, glazing type, controls. Use this to fact-check the assessment — assessors occasionally miss or mis-record an installed measure (e.g. underestimating loft insulation depth), and that error suppresses the rating. If you spot a wrong attribute, ask the assessor to revisit.

[Internal link: how to challenge an EPC at /how-to-get#challenges]

Most properties have a meaningful gap between current and potential rating. Closing it costs money, but the right sequence of measures can be funded substantially or entirely from public schemes if the property and household qualify.

The high-impact measures, in rough order of SAP-point uplift per £ spent:

1. Loft insulation to current standards (270mm) — typically 5–10 SAP points, £400–£1,000 install cost
2. Cavity wall insulation where the property has unfilled cavities — typically 8–15 SAP points, £500–£1,500 install cost
3. Heating controls upgrade (room thermostats, TRVs, programmable controls) — typically 2–5 SAP points, £200–£800
4. Boiler upgrade to A-rated condensing — typically 3–8 SAP points, £2,000–£4,000 — but consider heat pump alternative
5. Solid wall insulation (internal or external) — typically 12–20 SAP points, £8,000–£20,000 — very expensive but transformational
6. Air source heat pump replacing gas — under the new HEM methodology this becomes much more impactful than under SAP because heating-system emissions are scored separately
7. Solar PV — modest SAP impact (3–8 points) but materially affects the running-cost number on the certificate
8. Double or triple glazing if currently single-glazed — typically 3–6 SAP points, £4,000–£10,000

Public funding routes:

• Boiler Upgrade Scheme (BUS) — £7,500 grant toward an air source or ground source heat pump in England and Wales. Open to homeowners, private landlords, and small non-domestic properties
• Energy Company Obligation (ECO4) — supplier-funded measures (insulation, heating upgrades) for low-income and vulnerable households
• Warm Homes: Local Grant — local authority delivered, England-only, targeted at low-income households in the worst-performing properties (EPC D and below)
• Warm Homes Nest scheme — Welsh equivalent for low-income private renters
• Home Energy Scotland Loan — Scottish government interest-free loans up to £15,000 for energy improvements

For landlords, the £15,000 cost cap proposed under the MEES C uplift is designed to align with these schemes — public funding draws down the landlord's spend toward the cap.

[Internal link: full improvement guide at /improve-rating]

EPCs are devolved. The English/Welsh framework described above is the most prevalent — but Scotland and Northern Ireland operate parallel regimes with material differences.

Scotland. EPCs in Scotland are issued under the Energy Performance of Buildings (Scotland) Regulations 2008 and lodged on the Scottish EPC Register. The methodology is similar (RdSAP-based) but the certificate format differs and validity is the same 10-year window. Scotland has its own MEES regime — Energy Efficiency (Domestic Private Rented Property) (Scotland) Regulations — and is consulting on its own pathway to higher minimum standards. The Scottish Government's reform timeline does not necessarily track DESNZ's HEM:EPC schedule.

Northern Ireland. EPCs in NI are issued under the Energy Performance of Buildings (Certificates and Inspections) Regulations (Northern Ireland) 2008 and lodged on the NI EPC Register. The Department of Finance is the responsible body. NI has not adopted the same MEES framework as England and Wales — there is no equivalent minimum-band restriction on private rented sector lettings.

Cross-border landlords. A landlord with properties in multiple UK nations needs separate EPCs lodged on the relevant register and separate compliance with each jurisdiction's MEES rules. There is no UK-wide certificate.

[Internal link: Scotland-specific guide at /scotland]

Non-domestic EPCs use a different methodology — the Simplified Building Energy Model (SBEM) — which is appropriate for buildings with mixed and complex use (shops, offices, industrial, mixed-use). The rating scale runs from A+ down to G; A+ recognises buildings that are net energy generators (high-performance new builds with substantial on-site renewables).

Commercial EPCs are required in the same triggering circumstances as domestic — construction, sale, let — but with one important addition: Display Energy Certificates (DECs) are required for public buildings over 250m² and rate the building's actual energy use over the past year (not the modelled use). DECs are renewed annually for buildings over 1,000m² and every 10 years for smaller public buildings.

Commercial MEES. Privately rented non-domestic properties have been subject to MEES since April 2018 with a minimum band of E. From April 2030 the proposed minimum is band B for non-domestic privately rented stock — a much steeper uplift than the domestic C standard, reflecting the lower starting point of much commercial stock and the longer typical lease length. Commercial landlords planning lease renewals or new lettings post-2030 face the same compliance arithmetic as domestic landlords but with substantially higher capital costs per square metre.

The Energy Performance of Buildings statistical release for January to March 2026 reported around 400,000 EPCs lodged in the prior quarter for both domestic and non-domestic properties combined, a 1% decrease year-on-year (DESNZ statistical release).

[Internal link: full commercial guide at /commercial]