Post-construction energy verification conditions

A post-construction energy verification condition asks you to prove, after the building is built, that it performs as the energy statement said it would. The evidence is nearly always the same four things: an as-built calculation using the same method as the design-stage one, the air pressure test results, commissioning certificates for the plant and renewables, and a comparison table showing design-stage against as-built figures with the reasons for any difference. Submit those and the condition discharges. Submit a Building Regulations completion certificate instead and it will not, because they are separate regimes answering separate questions.

That last point causes more delayed occupations than anything else on this topic.

What a verification condition typically requires

Wording varies, and the substance rarely does. Before first occupation, or within a stated period of completion, submit evidence that the development has been constructed in accordance with the approved energy statement.

Read the condition closely for four things. Which document it refers to, by date and revision, since energy statements get revised during determination and the condition may point at the superseded one. What the trigger is, whether first occupation, completion or a phase milestone. Who the evidence goes to, since some authorities nominate a sustainability officer rather than the case officer. And whether it requires compliance with the approved statement or achievement of a stated numerical outcome, because those are different obligations.

Where the condition refers to a numerical outcome, you are committed to the number. Where it refers to the approved statement, you are committed to the strategy, and a different route to the same result can sometimes be agreed.

As-built assessment against design stage

For dwellings, the as-built calculation is produced under the current national calculation methodology by an accredited assessor, using the measured air permeability result rather than the design assumption. For non-domestic buildings the equivalent is the as-built building regulations compliance output.

The comparison is what the officer actually reads. Set it out as a table:

Where the as-built figure is better than design stage, say so and move on. Where it is worse, explain each contributing change rather than presenting a single unexplained shortfall. Officers accept a documented product substitution far more readily than a number that simply came out lower.

Photographic and commissioning evidence

Councils increasingly ask for construction-stage photographs, because a calculation cannot show whether insulation was installed continuously or whether a service penetration was sealed.

The set worth collecting, plot by plot or block by block:

• Insulation at floor, wall and roof junctions before they were closed up, with a scale reference and a location note.
• Window and door installation showing the insulation line continuing past the frame.
• Service penetrations sealed, before plasterboard.
• Air barrier continuity at the wall-to-ceiling junction in the top storey.
• Plant installed, with the data plate legible.
• Meters installed, with their serial numbers.

Commissioning certificates matter as much. A heat pump commissioning record showing the flow temperature it was set to, a mechanical ventilation commissioning sheet with measured flow rates at each terminal, and a generation meter reading with the commissioning date for any photovoltaic array.

Photographs without location and date information are close to useless in a discharge submission. Set up the naming convention on day one of the build.

Metering and monitoring requirements

Where the condition requires metering, it usually specifies separate metering of the low carbon technology so its output can be read independently of the whole-building supply. Get that into the electrical design early, because retrofitting a generation meter after the consumer unit is installed is disproportionately awkward.

In London, the requirement goes further. The London Plan energy policy adds a reporting stage after construction, so a major scheme reports actual energy performance data to the Greater London Authority at as-built stage and then annually for a period once the building is in use. Check the current Greater London Authority guidance for the reporting format and the duration, and set up the metering and data collection to match it from the outset rather than after handover.

Outside London there is no equivalent national in-use reporting duty, though individual authorities are adding their own through local plan policy.

Timescales and who submits

Discharge is by an application to the authority for approval of details reserved by condition, with the fee set by the national fee regulations and indexed annually.

The determination period is eight weeks, which is the number that catches developers out. A condition triggered by first occupation, submitted the week before handover, cannot be discharged in time. Work back from the occupation date and submit at least ten to twelve weeks earlier, allowing for the officer to come back with questions.

On a phased site, be explicit about which phase the submission covers and reference the phasing plan. Partial discharge is possible where a condition is expressed by phase, and the approach set out for energy masterplanning on a phased site matters here because a condition drafted for the whole site cannot be discharged phase by phase.

Who submits depends on the contract. On a design and build arrangement the contractor holds the evidence and the developer holds the planning obligation, and nobody has been made responsible for collating it. Name a person in the pre-start meeting.

What happens when performance falls short

Four routes, in the order they are usually explored.

Remedial works, where the shortfall has a physical cause that can be fixed, such as an untested unit that fails its air test and can be sealed and retested.

A revised calculation demonstrating the approved outcome by a different route, for example additional generation capacity or an improved appliance specification in the remaining plots.

A payment into the authority's carbon offset fund where one exists, which many London boroughs and a growing number of authorities operate with a published price per tonne. Check the published rate rather than assuming.

A section 73 application to vary the condition, which reopens the energy case and takes eight weeks, so it is a last resort rather than a plan.

If none of those happens, the authority can serve a breach of condition notice under the Town and Country Planning Act 1990, which carries no right of appeal, or take enforcement action. In practice the more immediate consequence is commercial: a purchaser's solicitor finds an undischarged pre-occupation condition and the sale stalls.

Keeping records during construction

Build the evidence file as you go, structured to match the condition rather than to match the construction programme.

1. Print the condition and the approved energy statement, and list every piece of evidence the condition calls for.
2. Assign each item an owner, by name, at the pre-start meeting.
3. Set the photographic naming convention: plot, element, date.
4. Log every product substitution at the point it is agreed, with the replacement specification and the effect on the calculation.
5. Book the air pressure testing into the programme rather than treating it as a completion activity.
6. Collate and submit at least ten weeks before the trigger.

Step four is the one that saves the project. A substitution recorded at the time, with its calculation effect, becomes a line in a comparison table. The same substitution discovered afterwards becomes an unexplained shortfall.

Where a scheme is using offsite manufacture, the evidence chain sits partly in the factory, and the position on modern methods of construction and the carbon case covers how to capture it. Where a certification scheme is also involved, the post-construction stage of a BREEAM pre-assessment runs on its own timetable and needs its own evidence, which overlaps with but does not replace the planning condition.

PlanScope can produce an AI-assisted draft Energy Statement at application stage, structured so the verification evidence maps onto it later. Reports should be reviewed before submission, and PlanScope does not guarantee planning approval. For specialist technical reports, qualified professional input may be required. Enter your postcode on PlanScope to see which reports a scheme is likely to need. This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it.