We are an EPC improvement advisory service: we work out how to raise your EPC score for the least money, in the right order, and we lodge the fresh certificate that makes the improvement count. That is a narrower and more useful job than "we do EPCs", most of the market will sell you an assessment or an installation, but few will tell you which measures to buy, in what sequence, and which ones to skip. This page explains how we work and, just as importantly, where our limits are.
Points first: we rank by cost per point, not by what is fashionable
Our method starts from a single number. A domestic EPC is a SAP rating from 1 to 100, and the gap between your current score and the next band, C at 69, B at 81, tells us exactly how many points you need. From there we rank every candidate measure by cost per point: the installed price divided by the SAP points it adds.
That ordering is deliberately not the one the market pushes. It puts LED lamps, a hot-water cylinder jacket and heating controls near the top, and it puts double glazing near the bottom, because a documented landlord case shows £5,400 of new front-elevation glazing adding just 2 points, while an £800 loft top-up added 8 or 9. We rank by the arithmetic, not by what is easiest to sell or what looks like the obvious upgrade. The full ladder, with sourced ranges, is on the cost page, and the starting-point gap analysis is on the homepage.
Assessed by accredited energy assessors
A score only changes when a fresh assessment is lodged on the national register, and that assessment has to be done by someone accredited to do it. Domestic assessments and re-assessments are the work of an accredited Domestic Energy Assessor (DEA) using the RdSAP methodology; commercial assessments are the work of an accredited Non-Domestic Energy Assessor (NDEA) using SBEM, or Dynamic Simulation Modelling for the most complex buildings.
That accreditation is not a badge of convenience. A legally valid EPC can only be produced by an assessor who is a member of a government-approved scheme, in practice Elmhurst Energy, Stroma / NAPIT, Quidos or ECMK. A certificate from anyone not properly accredited, or lodged incorrectly, is not valid, which is exactly when it matters, in the middle of a sale, a letting or a MEES check. We are clear about the boundary of that role: we assess, advise and re-lodge. We are not the installer, and we do not hold or claim installation credentials such as MCS, those belong to the certified contractors who fit heat pumps, solar and insulation, and we hand you on to them rather than pretend the two jobs are one.
Evidence-led under RdSAP 10
Since RdSAP 10 came into force on 15 June 2025, evidence is worth points, and this changed how a good assessor works. Under the current methodology every window is measured individually, heating efficiency is scored from documented model data rather than assumed, and smart heating controls and battery storage are recorded for the first time. The practical consequence is stark: a well-documented home out-scores an identical undocumented one, because undocumented improvements default to pessimistic age-band assumptions.
So a real part of what we do is preparing your evidence pack. We tell you exactly what to have ready for the assessor, invoices, the boiler make, model and serial number, FENSA or CERTASS certificates for glazing, MCS certificates for solar or a heat pump, and photographs of insulation depth, because turning up with the paperwork frequently recovers points an old, assumption-based assessment quietly threw away. That is often the cheapest points on the whole certificate: proof you already have, for work already done.
Honest about limits: we tell you when not to spend
The most valuable thing we say is often "don't". If your property is a modern, efficient home already sitting at B or C, we will tell you it does not need the works a quote is trying to sell it. If double glazing is the wrong way to buy points for your certificate, and it usually is, we will say so, and point you at the fabric and controls measures that cost a fraction per point. If a solid-wall period property can reach a high C on quick wins, loft and floor insulation without the £10,000-plus wall job, we will show you the sequence that does it, as one documented Victorian terrace achieved for around £8,550 without touching the walls.
We are equally straight about the rules, because a great deal of the advice online is out of date. The EPC C by 1 October 2030 standard for rented homes is confirmed government policy, not yet enacted law, confirmed on 21 January 2026, with secondary legislation reported as targeted for 2027. For commercial buildings, the proposed EPC B by 2031 applies to privately rented premises over 1,000 sqm only, and the previously floated 2027 interim milestone was dropped. We plan against the rule that actually applies to your building, current law first, confirmed direction second, speculation never, and we cite the government documents rather than the rumour mill.
What working with us looks like
The service is a loop, and it closes. We start from your current score and gap, produce a sequence ranked by cost per point for your specific property, tell you which measures to skip, prepare the evidence that protects the points, and lodge the fresh certificate on the national register when the work is done, because a score that is not re-lodged has not legally changed. We do not guarantee a specific uplift sight unseen, because anyone who does is guessing; we work from published-source ranges and your property's own recommendation report, and we are transparent that the assessment itself is a paid service with no grant behind it.
This site is operated by SEO Dons Ltd; assessments and re-assessments are produced by accredited energy assessors working to the government-approved schemes named above. If you want to see the questions we answer most often, how the score is calculated, how many points each measure adds, whether solar or a new boiler is worth it, the FAQs are the fastest way in, and the cost page shows the full costed ladder.