How Long Does an EPC Take and What Happens During the Visit?

If you’ve booked an Energy Performance Certificate (EPC), you might wonder whether the assessor will be in your home for hours or just a quick inspection.
Good news — a typical domestic EPC visit is straightforward, non-disruptive, and usually finished faster than most people expect.

How Long the EPC Inspection Takes

The visit length depends mainly on property size:

• Flat / Apartment: 20–30 minutes

• Small house: 30–45 minutes

• Average family home: 45–60 minutes

• Large or complex property: 60–90 minutes

After the visit, the report is normally delivered within 24 hours.

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What the Assessor Actually Does

The EPC assessor does not test appliances or damage anything.
They only observe, measure, and photograph permanent features of the property.

1. External Inspection

They check:

• Property type and construction

• Wall thickness and materials

• Roof style

• Insulation evidence

2. Room-by-Room Survey

They measure floor area and record:

• Windows and glazing type

• Radiators and heating controls

• Lighting types (LED vs halogen)

• Ventilation

3. Heating & Hot Water System

They identify:

• Boiler model

• Heating fuel (gas, electric, oil)

• Cylinder insulation

• Thermostats & programmers

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What They DON’T Do

Many homeowners worry about disruption — but an EPC is not a survey or safety inspection.

They will NOT:

• Drill or remove flooring

• Check electrics or gas safety

• Turn appliances on/off

• Value the property

• Fail the property

What You Should Prepare Before the Visit

To get the most accurate rating, have these ready if possible:

• Boiler installation certificate

• Insulation paperwork

• Double-glazing receipts

• Extension details

This can significantly improve your rating.

See services for landlords & sellers:
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What Happens After the Visit

The assessor uploads the data to the government register and generates your EPC rating A–G.

You receive:

• Official certificate (valid 10 years)

• Efficiency score

• Estimated running costs

• Upgrade recommendations

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Simple Explanation

Think of an EPC like a home energy audit — not a structural survey.
It measures efficiency, not condition.

Need Help Fast?

Contact the team directly:
https://epcrate.co.uk/contact-us-epc-services-london/

Office: 150–160 City Road, London, EC1V 2NX
Phone: 020 3488 4142
Email: info@epcrate.co.uk