Post occupancy evaluation commitments in a condition
A condition requiring in-use energy data years after occupation binds whoever owns the land by then. Say who that is before the condition is imposed.
A post occupancy evaluation condition requires in-use energy performance data to be collected and reported after the building is occupied, often for several years. The difficulty is not the data. It is that planning conditions run with the land, so a condition still in force three years after practical completion binds whoever owns the site then, which on a residential scheme means individual homeowners or a management company that was not party to the application.
That is the point to settle at the drafting stage, and it is why monitoring commitments are frequently better placed in a section 106 obligation than in a condition.
Why authorities ask for monitoring
The performance gap between modelled and measured energy use is well recognised in the industry, and authorities that have been granting permissions on the strength of modelled improvements for years have no evidence about whether those improvements materialised.
London Plan policy SI 2 formalised the response through its Be Seen limb, which expects as-designed, as-built and in-use energy performance to be reported through the Greater London Authority's platform for a period after occupation, with the current requirement set out in the GLA's guidance. A number of authorities outside London have adopted comparable requirements through their local plans.
The underlying policy aim is reasonable. The drafting is where it goes wrong, because a monitoring requirement is the only part of an energy strategy that has to survive the developer leaving.
What a monitoring condition typically requires
Wording varies, and most versions contain some combination of the following.
- A metering and monitoring strategy submitted and approved before occupation.
- Reporting of as-built performance within a stated period after practical completion.
- Reporting of in-use performance annually for a stated number of years.
- Submission through a named platform or in a named format.
- An explanation where measured performance differs materially from the approved Energy Statement.
Read each limb against the six tests in the Planning Practice Guidance on the use of planning conditions. Necessary, relevant to planning, relevant to the development permitted, enforceable, precise, and reasonable in all other respects.
The limbs that cause trouble are enforceability and reasonableness. A requirement to report annually for a period with no end date fails on precision. A requirement that will fall on individual flat owners fails on reasonableness. And a requirement to explain a shortfall, with no consequence attached, is at least honest about what the condition can achieve.
Metering strategy needed to deliver it
Reporting is only possible where the metering was designed for it, and that decision is made long before anyone thinks about the condition.
A workable strategy covers separate metering of each dwelling or tenancy, sub-metering by end use so heating, hot water, lighting and small power can be separated, metering of landlord and communal supplies distinct from occupier supplies, metering of any renewable generation both generated and exported, and data collection at intervals fine enough to be useful, which in practice means half-hourly where possible.
CIBSE guidance on metering and on operational energy prediction is the usual reference, and for offices the design for performance approach used in NABERS UK gives a framework that aligns prediction with measurement. On non-domestic buildings that framework is worth proposing, because it answers the authority's question better than a conventional compliance model does.
Specify who reads the meters and where the data goes. A building full of smart meters whose data sits with 40 separate energy suppliers is not a monitoring system.
Who holds the obligation after sale
Four possible answers, and only two of them work.
A condition binding the land, which after sale means the homeowners or the freeholder. This is the default and the worst outcome, because the people bound did not agree to it and cannot realistically comply.
A section 106 obligation binding a named management company, with the duty passed on in the transfer. This works on flatted and build-to-rent schemes where a management company exists.
A section 106 obligation binding the developer personally for a fixed period after completion. This works where the developer will still exist, and it is clean because nobody else is affected.
Or a commercial arrangement where the developer appoints a monitoring consultant for the reporting period and the cost sits in the development budget. Combine this with the previous option and the obligation becomes deliverable.
Raise it with the authority during the application. Officers are generally willing to move the requirement from a condition into an obligation once the successor problem is pointed out, because an unenforceable condition does them no good either.
Reporting formats and periods
Precision protects both sides, so pin these down.
The metrics, meaning energy use intensity in kWh per square metre per year, regulated and unregulated separately, and carbon on a stated emission factor set. Emission factors change, so name the source and the version.
The weather correction, because comparing an unusually cold year with a model run on standard weather data is not a comparison. Degree day normalisation should be stated as part of the method.
The reporting period and its end date. Three years is defensible, five is the upper end of what authorities have sought, and open-ended is not acceptable.
The occupancy caveat. Measured energy use depends on how people use the building, and a report that presents measured against modelled without noting occupancy and operating hours is misleading. Say so in the strategy.
What happens if performance falls short
Usually nothing, and the condition should say that honestly rather than imply otherwise.
A monitoring condition gathers evidence. It does not set a performance standard that can be breached, unless the authority has drafted a performance requirement, which raises its own problems because measured performance depends on occupier behaviour the developer does not control.
Some authorities seek a financial consequence, structured as a carbon shortfall payment where measured performance falls below the modelled figure. That is a different animal and belongs in an obligation with a defined formula, a cap and a dispute mechanism, drafted alongside any carbon offset contribution the scheme already carries.
Where a shortfall is identified, the useful response is an investigation requirement: identify the cause, report it, and propose reasonable remedial measures within the developer's control. Commissioning faults, control settings and ventilation balancing account for a large share of real-world shortfalls, and they are fixable.
Wording that is enforceable and proportionate
Four changes to ask for when a monitoring condition appears in a draft decision notice.
- Split the condition. One limb requiring a metering and monitoring strategy before occupation, a separate limb requiring reporting. The first is a normal pre-occupation condition and is easy to discharge.
- Fix an end date for reporting, expressed as a number of years from practical completion of the final unit.
- Move the reporting duty into a section 106 obligation binding a named party, so it does not pass to individual owners.
- Frame any shortfall provision as an investigate-and-report duty rather than a performance standard.
Then make the strategy itself a short, specific document rather than a narrative. A metering schedule, a data flow diagram, the named reporting party and the report template is enough, and it discharges in one round.
Keep the wider policy account in the Sustainability Statement and cross-reference rather than repeat it. On non-domestic schemes where a certification route is already in play, align the monitoring with the assessment so one set of data serves both, which is where a BREEAM Pre-Assessment and the monitoring strategy should be written together. Large-footprint buildings behave differently again, and we look at that in energy statements for warehouse and logistics schemes.
PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. This is general guidance rather than legal advice, so check the position with your local planning authority or a qualified professional before relying on it.
Frequently asked questions
Can a planning condition require energy data years after occupation?
It can be imposed, but conditions run with the land, so a reporting duty still live three years after completion binds whoever owns the site then. On a residential scheme that means individual owners or a management company that was never party to the application, which makes the condition unreasonable and hard to enforce.
Is a section 106 obligation better than a condition for monitoring?
Usually yes, because an obligation can bind a named party such as a management company or the developer for a fixed period, rather than passing to successors in title indiscriminately. Officers are often willing to move the requirement once the successor problem is explained, since an unenforceable condition helps nobody.
What does a metering strategy need to cover?
Separate metering of each dwelling or tenancy, sub-metering by end use so heating, hot water, lighting and small power can be separated, distinct metering of landlord and communal supplies, metering of renewable generation and export, and data collection at half-hourly intervals where possible. Name who reads the meters and where the data goes.
What happens if measured performance is worse than modelled?
In most cases nothing, because a monitoring condition gathers evidence rather than setting a standard. Where the authority wants a consequence, it belongs in an obligation with a defined formula, a cap and a dispute mechanism. A requirement to investigate the cause and propose reasonable remedial measures is the more useful provision.
How long should the reporting period be?
Three years from practical completion of the final unit is defensible and five years is the upper end of what authorities have sought. An open-ended requirement fails the precision test in the guidance on the use of conditions, so always ask for an end date expressed from a defined event.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.