An Energy Performance Certificate (EPC) assessment is usually quick — but preparation makes it smoother, faster, and more accurate.
When assessors can clearly see construction details and heating systems, your rating is based on real data instead of assumptions (which often lowers the score).

If you need to arrange an assessment:
👉 https://epcrate.co.uk/booking/

Why Preparation Matters

An EPC assessor cannot guess hidden features.
If evidence is missing, official methodology requires them to record the worst-case default value.

That means:

  • Hidden insulation = counted as no insulation

  • Unknown boiler = older inefficient system

  • Unknown glazing = standard single glazing

Preparation can literally improve your EPC rating.

1️⃣ Documents to Gather Before the Visit

Have these ready (printed or digital):

  • Previous EPC certificate (if available)

  • Boiler installation certificate

  • FENSA or window installation certificate

  • Insulation guarantees

  • Extension or renovation paperwork

  • Solar panel documentation

  • Heat pump paperwork

These allow the assessor to enter accurate specifications instead of defaults.

Learn more about what’s included in a certificate:
👉 https://epcrate.co.uk/domestic-epc

2️⃣ Make Key Areas Accessible

The assessor must inspect all main energy elements.

Please ensure access to:

Heating & Hot Water

  • Boiler

  • Cylinder cupboard

  • Thermostat

  • Programmer controls

Insulation

  • Loft / attic hatch

  • Under-stairs storage

  • Floor access panels (if any)

Structure

  • All rooms

  • Extensions

  • Conservatory connections

Blocked areas may lower the rating.

3️⃣ Lighting Check

Count your bulbs before the visit.

EPC scoring includes the percentage of low-energy lighting.

Tip:
Replace old halogen bulbs with LEDs — a quick rating boost.

4️⃣ Windows and Doors

Clean and uncover windows so glazing type is visible.

The assessor records:

  • Single / double / triple glazing

  • Frame material

  • Draught proofing

Keep certificates ready if recently installed.

5️⃣ Heating System Details

Know your system type:

  • Gas boiler

  • Combi boiler

  • Electric heating

  • Heat pump

  • Storage heaters

If the make and model plate is visible, the assessor can use the exact efficiency data.

6️⃣ Insulation Evidence

This has one of the biggest impacts on EPC ratings.

Provide proof of:

  • Loft insulation depth

  • Cavity wall insulation

  • Internal wall insulation

  • Flat roof insulation

No evidence = default low score.

7️⃣ External Areas

Make sure the assessor can view:

  • Outside walls

  • Extensions

  • Roof type

  • Meter boxes

Locked gardens or garages can delay the report.

8️⃣ Typical Assessment Time

Most homes take:

30–40 minutes

Larger or complex homes may take longer.

You’ll normally receive the certificate within 24 hours.

View pricing:
👉 https://epcrate.co.uk/pricing/

Quick Pre-Visit Checklist

✔ Documents ready
✔ Loft accessible
✔ Boiler visible
✔ All rooms unlocked
✔ Windows uncovered
✔ LED bulbs installed
✔ Heating controls reachable

Final Tip

Preparation doesn’t just speed up the visit — it can raise your EPC rating and make your property more attractive to buyers or tenants.

Book your assessment here:
👉 https://epcrate.co.uk/booking/

EPCRate Contact Details:
150–160 City Road, London, EC1V 2NX
📞 020 3488 4142
📧 info@epcrate.co.uk



Written by Jino Jose

DEA & NDEA Accredited Energy Assessor  ·  EPCRATE, London  ·  Founded 2015

Jino Jose is the founder of EPCRATE and one of the few London assessors holding both Domestic Energy Assessor (DEA) and Non-Domestic Energy Assessor (NDEA) accreditations. He has carried out thousands of EPC assessments across all 32 London boroughs since 2015.

✓ DEA Accredited ✓ NDEA Accredited ⭐ Trustpilot 5.0

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