The on-construction EPC every newly built dwelling needs before completion — generated from the as-built SAP calculation rather than a survey, lodged plot by plot, and required before building control will issue a completion certificate.
How it works
An existing home gets its EPC from a physical survey; a new dwelling doesn't. The on-construction EPC comes straight out of the as-built SAP model — the same calculation that proved the dwelling complies with Part L. Fabric U-values, glazing specification, the heating and hot water system, ventilation, the air-pressure test result and any renewables all feed the rating directly.
Because those inputs are precise design and test data rather than the age-based assumptions a surveyor has to make in an older property, new build ratings are strong: most new dwellings achieve band B, which is a genuine selling point when the plot goes to market.
Why it can't wait: building control will not issue a completion certificate for a new dwelling without the on-construction EPC, and the buyer's solicitor will expect it at completion. A missing EPC is one of the easiest ways to stall a sign-off — and one of the easiest to avoid.
Off-plan & multi-plot
You can't wait for a finished building to start selling it. A Predicted Energy Assessment, produced from the design-stage SAP, gives you the energy information needed to market a plot off-plan. When the dwelling completes, the PEA simply hands over to the lodged on-construction EPC — no duplicate work, because both come from the same model.
On multi-plot sites we lodge plot by plot as each dwelling completes, track which plots still need an air test or an as-built update, and keep the paperwork consistent so every solicitor's completion pack looks the same. Volume pricing is available on request — send us the plot schedule and we'll price the site as a whole.
Need the SAP as well? Most clients do — see SAP calculations for new builds for the design-stage and as-built assessments this EPC is generated from, and U-value calculations if any element build-ups still need proving.
One team
Because we run the SAP calculations in-house, a plot can go from design-stage assessment to lodged EPC without being handed between companies — one point of contact, one model, no re-keying of data and no gaps for building control to query. If you're preparing the plot for market at the same time, we can supply portal-ready floor plans alongside the certificate.
Common questions
It depends on the number of plots and whether we already hold the SAP model for the site — lodging an EPC from our own as-built assessment involves far less work than rebuilding one from scratch. Send the site address and plot list via the quote form and we'll reply with a fixed quote, usually the same working day. Volume pricing is available on request for multi-plot developments.
No. An on-construction EPC is generated from the as-built SAP calculation rather than a physical survey, so there is no appointment at the property. What we need is the completed SAP data — construction details, the final specification and the air-pressure test result.
A PEA is the document that lets you market a plot off-plan before it is finished. It is produced from the design-stage SAP calculation and shows the predicted energy rating. Once the dwelling is complete, the PEA is superseded by the lodged on-construction EPC.
Before building control will issue the completion certificate — and the buyer's solicitor will ask for it at completion too. Order it as soon as the air-pressure test result is available rather than in the final week, so a missing certificate never holds up sign-off or a sale.
Usually, yes. If your previous assessor's data is available we can review it and take the plot through to a lodged EPC; if it isn't, we can re-model the dwelling from the drawings, specification and air test result. Send us what you have and we'll confirm the simplest route.
Tell us the property type and postcode — we'll come back with a fixed quote and the earliest available date.