If you’re buying, selling or letting a property after mid-June 2025, you’ll want to keep reading.
The software we use to carry out domestic EPCs (that’s RdSAP – the Reduced Data Standard Assessment Procedure) is getting its first major upgrade in over a decade. The new version, RdSAP 10, officially goes live on 15th June 2025. And while it won’t be making headlines on the 10 o’clock news, it will mean some significant changes – both in how we assess properties, and how long the process takes.
So what’s actually changing?
1. 🪟 Every. Single. Window.
We used to assess windows in a more generalised way – for example, recording “mostly double glazed” or “some single glazing.” With RdSAP 10, we now need to measure and record the size, type and condition of every individual window in the property. That means more time on site and more accuracy in the final assessment.
2. 💡 Bulbs, not just fittings
We’ll now be logging each individual lamp (that’s the bulb itself) rather than just the light fitting. It sounds small, but this matters – because energy-efficient LED bulbs make a real difference to your overall EPC rating.
3. 🔋 Smarter tech gets proper recognition
Battery storage (such as for solar PV), mechanical ventilation with heat recovery (MVHR), and other newer technologies will now be properly recognised and scored. This means homes that have invested in modern energy-saving kit should see their EPCs reflect that.
4. 🌡️ Heat pumps finally get a mention
You’ll also start to see heat pumps showing up in EPC recommendations – a long overdue addition, and one that aligns better with government policy and net-zero goals.
So what does this mean for homeowners and agents?
In short: more detail, more accuracy – and slightly longer assessments.
We’ll be spending a bit more time on site, especially in homes with lots of windows, different lighting setups, or renewable tech. And inevitably, EPC prices will increase a little to reflect the extra work involved.
But the good news is that the reports you receive will be more reflective of what’s actually in the home – which is especially helpful for modern or upgraded properties.
Anything to watch out for?
Not really – just be aware of the change in timeline. If you’re planning to get an EPC before mid-June, it will still be under RdSAP 2012. If you wait until after, it’ll be RdSAP 10. So if your home has newer tech like an air source heat pump or solar panels, it might be worth waiting.
Want to chat about it?
If you’re an estate agent, landlord, or homeowner with questions about how these changes will affect your property – just drop me a line. And if you’ve got a property with an air source heat pump or solar panels? All the better. We’ll make sure your new EPC reflects it properly.
📧 epc@peeqproperties.com
📞 01582 216006
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