EPC Inspection Checklist: What to Have Ready

A domestic EPC appointment is usually straightforward, but a little preparation can make a real difference. This EPC inspection checklist explains what an assessor needs to see, which details are useful to have ready, and why access matters when a property is being sold, let or improved.

An Energy Performance Certificate is based on the property as it is on the day of the visit. The assessor records its construction, heating, insulation and fixed energy features, then uses approved software to produce the rating and recommendations. It is not a survey, a valuation or a test of whether every appliance is working. Still, accurate information at the assessment stage helps ensure the certificate reflects the home properly.

Why preparation matters for an EPC assessment

An assessor can only record features they can see or support with suitable evidence. If the loft hatch is inaccessible, a boiler is hidden away, or improvements cannot be confirmed, the assessment may need to use a default assumption. Defaults are not penalties, but they can be less favourable than documented improvements.

For sellers and landlords, this can affect how the property is presented. For landlords in particular, the EPC rating can be relevant to Minimum Energy Efficiency Standards. Most privately rented homes need an EPC rating of E or above, although exemptions and particular circumstances can apply. If a rating is close to the threshold, getting the detail right is worth the small amount of preparation involved.

Estate agents also benefit from a clear, well-organised visit. A completed assessment and prompt certificate lodging help keep a listing or tenancy moving without avoidable back-and-forth.

EPC inspection checklist before the assessor arrives

You do not need to clean the property from top to bottom or produce a folder of paperwork. The practical aim is simply to let the assessor inspect the relevant areas safely and record upgrades accurately.

Make key areas accessible

The assessor will normally need reasonable access to every room, including the kitchen, bathrooms and any utility space. They may need to view the boiler, hot-water cylinder, electricity meter, heating controls, fireplaces and fixed heaters.

Please make sure there is a clear route to the loft hatch where possible. The assessor may inspect the loft insulation from the hatch, but will not climb through a hatch or enter an unsafe roof space. Garages, converted loft rooms, extensions, conservatories and outbuildings connected to the home can all be relevant too.

If a room is locked, a heating system is in a cupboard, or a tenant will not be present to allow access, mention it when booking. It may be possible to plan around this, but it is much easier to do so before the appointment.

Have evidence of improvements available

Paperwork is not always required, but it can be very useful where an improvement is not visible. Good examples include an invoice, guarantee, installation certificate, building-control sign-off, specification sheet or a clear photograph taken during the work.

The most helpful evidence often relates to:

• loft, wall or floor insulation that cannot be seen during the visit

• replacement windows and doors, particularly if the glazing rating is known

• a new boiler, heat pump or hot-water cylinder

• solar photovoltaic panels, battery storage or solar thermal water heating

• extensions, conversions or major refurbishment work

• underfloor heating, heating controls or mechanical ventilation systems

A receipt that only says ‘building work’ may not provide enough detail. If you have documents, have the relevant pages ready rather than leaving the assessor to search through a large pack. A model number for a boiler or heating system can also help where the label is unclear.

Check your heating and hot water details

The heating system has a major influence on an EPC. The assessor will identify the main source of heating, how hot water is provided, the fuel used and which controls are installed. They will also note secondary heating, such as a fixed gas fire or wood-burning stove, where applicable.

Before the visit, know whether the property has a regular boiler and cylinder, a combi boiler, electric storage heaters, an air-source heat pump or another system. If the controls are separate from the boiler, make those accessible as well. A thermostat, programmer, thermostatic radiator valves and smart controls can each be relevant, but only if they are installed and functioning as part of the fixed system.

Portable heaters do not count as a permanent heating feature. Neither do household appliances such as washing machines, freestanding fans or televisions. An EPC measures the building and its fixed services, not how individual occupants use energy day to day.

Point out changes to the property

Tell the assessor about alterations that might not be obvious from the front door. This includes a garage conversion, rear extension, loft conversion, internal reconfiguration or a conservatory that has been opened into the main house.

Construction age matters because it informs the assumptions used for walls, floors and roofs. A Victorian terrace with a recent extension, for example, is not assessed as one single construction type. The original part and the later addition may have different walls, glazing and insulation levels.

If you know when an extension was built, share that information. Building-control records or plans can be useful, although the assessor will still need to observe and measure the layout during the appointment.

What happens during the EPC visit

A typical domestic EPC inspection is non-invasive and often takes around 45 minutes to an hour, depending on the size, layout and complexity of the property. Larger homes, unusual construction, several heating systems or extensive additions can take longer.

The assessor will take measurements and photographs, record the age and construction of walls, roofs, floors and windows, and inspect fixed lighting. They will look at insulation where it is safely visible, identify the heating and hot-water arrangements, and record any renewable technologies.

Photographs are used as supporting evidence for the assessment and are not marketing photographs. The visit should not involve drilling, lifting floorboards, moving heavy furniture or testing electrical installations. An EPC assessor is there to collect the information required for the certificate, not to diagnose defects.

That distinction matters. If an assessor sees signs of a problem, such as damp, an unsafe-looking installation or a damaged roof, it does not become part of a building survey. You may wish to arrange specialist advice separately, especially before committing to improvement works.

Common issues that can affect the result

The most common difficulty is an inaccessible feature. A locked loft hatch can prevent insulation from being confirmed. A boiler concealed behind stored items may mean key data cannot be read. Curtains or blinds covering every window can make it harder to identify glazing type and frame details.

Another issue is assuming that a recent upgrade will automatically appear on the EPC. If insulation is inside a wall or under a floor, the assessor needs adequate evidence. Without it, they must follow the approved methodology rather than take a guess.

Solar panels are also occasionally missed because they are not mentioned at the appointment. Let the assessor know about panels, batteries and any solar hot-water system, even if equipment is outside or in the loft. Where available, have installation details to hand.

Finally, do not confuse an expired EPC with an inaccurate one. An EPC can remain valid for ten years, but it will not update itself after a new boiler, insulation work or solar installation. If you have made meaningful improvements, a new assessment may give you a more current rating and more relevant recommendations.

When a domestic checklist is not enough

The process described here applies to homes and flats requiring a Domestic EPC. Commercial premises are assessed differently and may need a Level 3 Commercial EPC, depending on their size and services. Public buildings that are frequently visited by the public may also need a Display Energy Certificate, which looks at actual energy use rather than the asset rating used for an EPC.

If a building contains both commercial and residential areas, the requirement can depend on how it is used, accessed and metered. That one is best clarified before booking, rather than discovering on the day that a different assessment is needed.

For property owners across Melton Mowbray, Leicester, Grantham, Peterborough and Loughborough, the simplest approach is to mention anything unusual at the outset. A local accredited assessor can confirm the right certificate, the fixed cost and likely timescale before the visit.

A few minutes spent opening the right doors and gathering upgrade evidence can prevent an EPC from relying on assumptions. It keeps the appointment simple, gives the assessor the clearest possible picture of the property, and leaves you with information you can use with confidence.