Most EPCs are produced under reduced-data SAP (RdSAP), which locks the assessor into cautious "worst-case" default assumptions they cannot override, even when they are wrong. As accredited full SAP assessors, we can replace those defaults with properly evidenced values, so your certificate reflects your property's real performance. That often means recovering several SAP points and avoiding needless upgrade costs on the road to a compliant Band C.
Time left until the proposed EPC C rental deadline (1 Oct 2030)
Lock in an accurate certificate now and it stays valid for 10 years, before the stricter Home Energy Model tightens the rules.
A standard EPC is produced under reduced-data SAP (RdSAP), where the assessor can only enter the assumed values the software offers. Whenever something isn't recorded (the exact cavity insulation, floor insulation, or your heating controls), the software fills the gap with a cautious worst-case default, and a reduced-SAP assessor has to accept it: they cannot substitute the real figure. You're not failing compliance because your property is bad. You're failing because those locked-in assumptions are guessing, and guessing pessimistically.
A reduced-SAP assessor can only accept the assumptions the software provides. Anything left unverified stays at worst-case, baked into your score for 10 years.
Each default assumption can quietly cost you SAP points, pushing a genuine Band C property down into a "failing" D or E.
Acting on a wrong rating means paying for insulation or heating you may not actually need to be compliant.
The government is steadily tightening the private rented sector. Securing an accurate, optimised certificate now locks in your compliance position for a full 10 years, before newer, stricter assessment methods make reaching a C harder and more expensive.
Current methodology still lets accredited assessors record evidence-backed values. Best time to act.
Landlord/property registration set to become mandatory under the Renters' Rights reforms.
A stricter successor to RdSAP begins phasing in, changing how ratings are calculated.
Proposed minimum of Band C to let, or a valid registered exemption. Fines proposed up to £30k.
A clear, low-friction path from "probably failing" to a compliant, evidence-based EPC.
Send your address or your current failing EPC using the quick form below. Takes under a minute.
We check the existing certificate against the national EPC register and pinpoint exactly where cautious default assumptions are draining your score.
One of our accredited full SAP assessors visits and carries out a complete, in-person inspection, capturing the detailed evidence a standard reduced-SAP survey simply never records.
Working in full SAP, we rebuild your assessment around that real-world evidence so your certificate reflects the property's genuine performance, or we confirm the right exemption route.
You'll know how many SAP points we can realistically recover, what (if anything) still needs doing, and how we get you to a compliant, defensible Band C.
Don't guess your compliance strategy. Tell us the property address (or send your current failing EPC) and we'll review the public data to identify exactly where standard software assumptions are draining your score, and tell you how many points we can realistically claw back.
We only use your details to prepare and send your review. No spam, ever.
