EPC Report Cost and Time Guide

An Energy Performance Certificate (EPC) is a legal requirement when you sell or rent a UK property. Cost is typically £60–£120 for a standard residential survey, with the certificate produced within 24–72 hours. Premium / urgent service can run £150–£200 with same-day turnaround.

EPCs are valid for 10 years. If your existing EPC is still in date and you've made no changes that affect energy performance, you don't need a new one to sell or let. Check at find-energy-certificate.service.gov.uk.

Typical UK EPC costs

Prices vary regionally; London assessors often charge at the upper end. Multi-property bookings (a landlord with several properties on the same street) often attract a discount per property.

What the assessor does

An accredited Domestic Energy Assessor (DEA) typically takes 30–60 minutes for a 3-bed home. They'll:

• Measure each room and total floor area.
• Note the construction type (cavity / solid wall / timber frame), insulation visible.
• Inspect the heating system — boiler model, age, controls, hot water cylinder.
• Count radiators, check thermostat positions and TRVs.
• Measure and count windows by type (single / double / triple glazed).
• Check insulation in the loft (depth) and wall cavities (where evidence available).
• Note any solar PV, solar thermal, heat pump or other low-carbon installations.
• Photograph the boiler data plate, meter readings, and any insulation evidence.

The data is entered into RdSAP (Reduced Data Standard Assessment Procedure) software, which produces the certificate, energy rating (A–G), and recommended improvements.

How to prepare for the visit

• Loft hatch access — make sure they can see the loft to measure insulation depth. No access = assumed minimum spec, which lowers your rating.
• Boiler manual or data plate — exact model and age affect the rating significantly. Have it ready.
• Cavity wall insulation evidence — if you've had cavity wall insulation installed, the certificate from the installer (CIGA, GDGC, etc.) lets the assessor record it. Without evidence, they must mark walls as uninsulated.
• Solar / heat pump documentation — installation certificates, MCS reference numbers. Without these the assessor can record the system but it may attract less weight in the rating.
• Recent insulation upgrades — gather any building control sign-offs or contractor receipts.

The MEES regulation — landlords pay attention

Since 2018, properties let in the private rented sector must have an EPC of E or better. The threshold is rising: from 2028 (proposed), all new tenancies need C or better; from 2030, all existing tenancies. Landlords with F/G properties cannot legally let them without exemption registration.

If your rental is currently E and you're approaching renewal, get your EPC reviewed early — improvements (insulation, boiler upgrade, LED lighting) take time to commission and certify.

Things people often miss

• Old EPCs may already be on file — search the EPC register at find-energy-certificate.service.gov.uk by postcode. If yours is under 10 years old, you don't need a new one for sale.
• Choose an MCS-registered assessor for renewables — if you have solar PV or a heat pump, an assessor familiar with these systems will record them more accurately, often improving your rating.
• RdSAP defaults are conservative — when evidence is missing, the assessor must assume the worst case. This is why providing documentation matters.
• Recommendations are guidance, not mandatory — the EPC's improvement suggestions are advisory only. You don't have to act on them, though they can help the property's appeal at sale and rental.
• Re-rating after improvements — if you've added insulation, replaced the boiler, or fitted solar, request a new EPC to capture the improvement. This is increasingly important for landlords approaching MEES thresholds.

Frequently asked questions

How long does an EPC last?

10 years from the date of issue. You can use the same EPC for multiple sales / lettings within that period unless major changes affect the energy rating (extensions, heating system swaps).

Do I need a new EPC if I extend my house?

Not legally required, but if the extension significantly changes the property's footprint or energy profile, the existing EPC will be inaccurate at sale. Many buyers' solicitors flag this. A fresh EPC after substantial works is good practice.

Can I challenge a low EPC rating?

Yes — request a re-assessment from a different accredited assessor, particularly if you have evidence of improvements that weren't recorded (cavity wall insulation, modern boiler, solar PV). Cost is the same as a regular EPC.

What does my EPC rating actually mean?

The A–G scale represents both energy efficiency (running costs) and CO2 emissions. A is the most efficient (typical: new-build with solar and heat pump); G is the least efficient (typical: pre-1900 solid-walled with old boiler and minimal insulation). Most UK homes are D or E.

How much does it cost to improve from E to C?

Highly variable. Likely improvements: cavity wall insulation (£500–£1,500), loft insulation top-up (£300–£700), boiler upgrade (£2,500–£4,000), LED lighting (£200–£600), draught proofing (£150–£400). Typical total to lift E → C: £3,000–£8,000 for a 3-bed semi.

Does a new build need an EPC?

Yes — every new dwelling requires an EPC at completion. Most new builds achieve B or C ratings; new builds completed under the upcoming Future Homes Standard from 2025/26 will target A.

Want a local pro to handle this? An accredited Domestic Energy Assessor will visit, survey, and lodge your EPC quickly. Booking through a comparison aggregator is usually £20–£40 cheaper than direct, but local independent assessors often have stronger knowledge of the area's typical construction.