7 EPC Mistakes Cambridge Homeowners Make (And How to Fix Them Before You List)

If you are selling or renting out a property in Cambridge, your Energy Performance Certificate (EPC) is more than just paperwork. Buyers, tenants, lenders and surveyors increasingly look at EPC ratings as a signal of running costs and overall property condition.

The good news is that many EPC issues seen across Cambridge are entirely avoidable with early preparation and a properly briefed Domestic Energy Assessor.

1. Booking the EPC at the Last Minute

Solicitors and estate agents will usually request a valid EPC as soon as a property is marketed or an offer is accepted. Leaving it too late can delay listings, sales progression or tenancy start dates.

• Book your EPC as soon as you decide to sell or let.
• In busy Cambridge postcodes, appointment availability can tighten quickly.

This is a common issue nationally and is covered in more detail in our guide on EPC mistakes that delay property sales and rentals.

2. Not Telling the Assessor About Recent Upgrades

We regularly see Cambridge homes where owners have invested in new boilers, insulation or glazing, yet the EPC still reflects an older rating because evidence was not available on the day.

• Gather boiler invoices, insulation certificates and FENSA documentation.
• Have them ready for the assessor to review.

If improvements are not documented, they cannot be included in the EPC calculation.

3. Ignoring Loft Insulation

Loft insulation remains one of the simplest ways to improve EPC performance. Many Victorian and 1930s Cambridge homes still have thin or inconsistent insulation.

• Aim for approximately 270mm of insulation where possible.
• Ensure the loft is safely accessible during the visit.

4. Assuming Period Homes Cannot Score Well

While Cambridge has a high proportion of period properties, this does not automatically mean a poor EPC rating. Measures such as secondary glazing, modern heating controls and efficient lighting can still make a meaningful difference.

This misconception also affects older housing stock in cities such as Stoke-on-Trent, where EPC preparation can significantly influence marketing outcomes.

5. Blocking Access to Key Areas

If the assessor cannot access the loft, boiler, hot water cylinder or key rooms, they must assume the lowest reasonable standard for EPC calculations.

• Ensure all relevant doors are unlocked.
• Provide safe access to loft hatches and meters.

6. Not Optimising Lighting and Heating Controls

Low-energy lighting throughout the property and documented heating controls — such as programmers, thermostats and thermostatic radiator valves — can all contribute positively to an EPC rating.

7. Choosing an Assessor on Price Alone

The cheapest quote is not always the best option. An assessor familiar with Cambridge property types is more likely to request the correct evidence and avoid unnecessary re-visits.

Understanding EPC pricing more broadly can also help set expectations — see our guide on how much an EPC costs in the UK.

What to Do Next

If you are preparing to sell or let in Cambridge, checking EPC validity early and preparing documentation can prevent delays later in the process.

Local availability and booking options can be found on our dedicated page: EPCs in Cambridge – Book Online.

EPC appointments can also be arranged via the online booking page.