EPC survey cost: what you’ll pay and what the assessor checks

Quick answer: An EPC survey costs £60 to £120 for most homes in 2026, takes 45 minutes to an hour, and the certificate lasts ten years. Book direct through the government’s find-an-assessor service. Since June 2025 assessors record far more detail and want receipts for improvements, so dig your paperwork out first.

How much does an EPC survey cost in 2026?

There’s no set government fee. You’re hiring a private assessor, and prices move with property size and postcode. The HomeOwners Alliance puts the typical range at £60 to £120 (checked August 2026). A one-bed flat sits nearer £50. A five-bed detached can hit £120, and genuinely large or awkward properties up to £150.

For an ordinary two or three-bed house, £65 to £85 is the going rate. Quotes well above that usually mean a middleman. Estate and lettings agents will happily arrange your EPC and add a margin for making the phone call. Book direct and keep the difference.

Prices crept up after June 2025, when the assessment method changed. More on that below.

How long does the survey take?

Around 45 minutes to an hour for a typical house, according to the HomeOwners Alliance. The assessor needs access to every room, the loft and the boiler. You don’t need to tidy. They’re recording the building, not the housekeeping.

Visits have got longer since June 2025 because assessors now record more detail per property, glazing included. Budget an hour and you won’t be caught out.

What does the assessor actually check?

Domestic EPCs use a survey method called RdSAP. The assessor works through a fixed data set:

• Loft insulation depth, measured in the loft
• Wall construction and thickness, to judge whether cavities are filled
• Glazing type and condition, window by window
• The heating system: boiler make and model, thermostat and controls
• Fixed lighting
• Any solar panels or other renewables

It’s a standardised model, not a bespoke study. Two assessors following the rules should land on the same rating. If yours seems badly off, the site guide to challenging a wrong EPC rating walks through the dispute route. The single biggest scoring lever in most homes is insulation evidence, because unfilled or unproven walls get assumed default values.

What changed under RdSAP 10?

The survey method was overhauled on 15 June 2025, the biggest revision in over a decade. Propertymark reports that assessors now record glazing types and their condition, take heating efficiency from model numbers and manufacturer data, and log smart heating controls. Some of its members have already reported higher assessment costs as a result.

Improvements only count if you can evidence them, so find your receipts before the visit. Cavity wall insulation done in 2019 scores nothing without the guarantee certificate or installer paperwork. No evidence means the assessor falls back on age-based assumptions, and assumptions usually score worse. The rating system itself is changing too: our guide to the new four-metric EPC covers what’s coming next.

How do you find an accredited assessor?

Use the official gov.uk find-an-assessor service. Enter your postcode, pick the property type, and contact assessors directly. The Ministry of Housing runs a helpline for the service on 020 3829 0748 if you get stuck.

Only an accredited domestic energy assessor can lodge an EPC on the national register. A cheap-EPC website that won’t name its assessor or their accreditation body isn’t worth the saving. Ask who’s coming and who accredits them. A legitimate assessor answers both in one sentence.

Should you book it yourself or let the agent handle it?

Book it yourself. Agents deal with volume, so they route EPCs through panel firms and the convenience gets priced in. Ringing two local assessors takes ten minutes and usually undercuts the price an agent would arrange for the same certificate.

Timing matters more than people think. The certificate has to exist before marketing starts, and a rushed EPC booked the day photos are taken is how homes end up scored on assumptions. Book the assessor a week or two before the agent, while you still have time to find missing paperwork.

One more distinction: an EPC is not a retrofit survey. It’s a rating exercise for the register. If you want a room-by-room plan for insulation or a heat pump, that’s a different visit with different depth; our guide to heat loss surveys covers what the fuller assessment looks like.

When do you actually need an EPC?

When you sell or let. You must have commissioned one before the property is marketed, and the HomeOwners Alliance notes penalties of up to £5,000 for not having one. Certificates last ten years. A still-valid EPC from the previous owner does the job, so check the register before paying for a new one.

You don’t need one to remortgage with most lenders. A boiler swap or a solar application doesn’t need one either. But grant schemes lean on them: Warm Homes: Local Grant eligibility starts at EPC D, so for some households the £70 survey is the gateway to thousands in funded work.

Landlords have more riding on it: rentals need at least an E now, with a C requirement planned for 2030. Our MEES 2030 guide covers the deadline in detail. And if you’re selling, a band improvement is cheap marketing; see improving your EPC before selling for the upgrades that shift bands.

FAQs

Is an EPC ever free?

If a valid certificate already exists, you can download it from the register at no cost. A fresh survey always costs money, though some retrofit schemes include an assessment as part of the work.

Do I need a new EPC after making improvements?

Not legally, until you next sell or let. But the old rating stays on the register until it’s replaced. If you’ve just insulated or changed the heating, a £70 reassessment is the only way the register reflects it.

Can I prepare anything to get a better rating?

Yes: receipts, guarantees and installation certificates for any energy work. Leave the loft hatch accessible and the boiler manual out. Evidence is the difference between measured values and pessimistic defaults.