Sustainability statement or energy statement: what differs
Councils ask for both because their local plans contain separate policies. The energy statement owns the carbon calculation; the sustainability statement owns everything else and cross references it.
The difference between a sustainability statement and an energy statement is scope. An energy statement answers one question in detail: how the building meets the carbon and energy requirements of policy and the Building Regulations. A sustainability statement answers a dozen questions at a lower resolution, of which energy is one. Councils ask for them separately because their local plans contain separate policies, and submitting one where both are required is a common cause of a validation query.
Neither document should repeat the other. That principle does most of the work in deciding what goes where.
What each document is asked to cover
An Energy Statement sets out the baseline calculation against the current Part L standard, the demand reduction measures in the fabric and form, the low carbon heat strategy, any on site renewable generation, the resulting regulated carbon figure, and how any residual shortfall against policy is addressed. Where a local plan follows the energy hierarchy, the statement is usually structured around its steps.
A Sustainability Statement covers water efficiency, materials and responsible sourcing, construction and operational waste, biodiversity and green infrastructure, climate resilience and adaptation, sustainable transport, health and wellbeing, and a summary of the flood risk and drainage strategy. It also answers whatever the local plan's sustainable design policy asks that the energy statement does not.
The reader is different too. The energy statement is read by a sustainability officer or an energy consultant working for the authority, with a calculation output to check. The sustainability statement is read by the case officer, as a narrative that shows the scheme has thought about the rest of the policy.
Where the two overlap
Carbon and energy appear in both, and that is the overlap to manage. Handle it by putting the full calculation in the energy statement and a short cross referenced summary in the sustainability statement, with a sentence saying where the detail sits.
Overheating is the other shared topic. The assessment itself belongs in an Overheating Risk Assessment where one is required, with the conclusion referenced from both statements. Putting three partial versions of the same analysis in three documents invites the officer to find the inconsistency, and there usually is one.
| Topic | Energy statement | Sustainability statement |
|---|---|---|
| Regulated carbon calculation | Full method and output | One paragraph summary with a cross reference |
| Heat strategy and renewables | Full | Summary |
| Water efficiency | Not covered | Full, with the target and how it is met |
| Materials and responsible sourcing | Not covered | Full |
| Waste and circular economy | Not covered | Full, or a separate statement on larger schemes |
| Climate adaptation | Overheating only | Full, including flood resilience and planting |
| Transport and travel | Not covered | Summary, cross referenced to the transport documents |
Topics that belong only in a sustainability statement
Water efficiency is the one most often forgotten. Where a local plan sets a tighter target than the national standard, the statement has to say how it is met, usually through fittings specification, and the council will condition it.
Materials, responsible sourcing and the approach to embodied carbon sit here too, although on larger schemes embodied carbon moves into a Whole Life Carbon Assessment following the RICS methodology. Biodiversity appears as a summary of the net gain position rather than as the metric itself. Climate adaptation covers shading, planting, permeable surfaces and resilience of the drainage design to future rainfall.
Health and wellbeing is the section most likely to be filled with generalities. Give it specifics: daylight factors achieved, private and communal amenity space areas, distance to the nearest open space, cycle storage provision, and the acoustic standard for internal noise levels.
Local checklists and scoring tools
Many authorities publish a sustainability checklist or a scoring matrix that has to be completed and submitted. Find it on the local validation list before writing anything, because the structure of the checklist should drive the structure of the statement.
Where a non domestic scheme has a BREEAM policy requirement, a BREEAM Pre-Assessment at application stage shows the target rating is achievable. It has to be prepared by a licensed assessor, and the design stage and post construction certificates follow later under condition. Councils usually expect a suitably qualified author, and professional review of any draft is strongly advised.
Avoiding duplication across the submission
Decide the home for each topic before drafting, and write a one page contents map for the team. On a major application the same subject can otherwise appear in the energy statement, the sustainability statement, the design and access statement and the planning statement, in four slightly different forms.
The rule that works: the technical document owns the analysis, and every other document quotes its conclusion with a reference. If a number changes late, you then have one place to change it and three cross references to check, rather than four independent texts to reconcile.
Illustrative example: a scheme of 60 flats where the heat strategy changed from a communal gas system to air source heat pumps three weeks before submission. The energy statement was reissued. The sustainability statement, the design and access statement and the planning statement each carried their own description of the heat strategy, and two of them went in unamended. The officer spotted it and the application was held for clarification.
Proportionate content by scheme size
Householder applications rarely need either document. Minor residential schemes usually need a short combined statement where the local plan has a sustainable design policy, and many authorities accept a single document covering both if the policy content is addressed.
Major schemes need both, separately, plus whatever the local plan adds: a whole life carbon assessment, a circular economy statement, a district heating feasibility study. In London the requirements are set out in the London Plan and its supporting guidance, and they are more demanding than elsewhere.
Length is not the measure. A twelve page energy statement with the calculation output appended beats a forty page document that restates policy.
One practical test before submission: read each statement as though you were the officer, and ask whether every policy in the sustainable design chapter of the local plan has been answered somewhere. Policies usually come in numbered criteria, so work down the criteria and note the page that deals with each. A half page table doing exactly that, placed at the front of the sustainability statement, saves the officer an hour and tends to shorten the consultation.
The conditions each document attracts
An energy statement typically leads to a condition requiring the approved energy strategy to be implemented, sometimes with a post construction verification report comparing as built performance with the approved figures. Renewables are commonly tied to a pre occupation trigger.
A sustainability statement leads to conditions on water efficiency, on the BREEAM rating where applicable, on a materials schedule, and on the submission of a site waste plan. Read the proposed wording before committee. A condition requiring an as built assessment to demonstrate the approved carbon figure has been achieved is reasonable. A condition requiring a better figure than the one approved is not, and it is easier to correct in draft than after the decision notice is issued.
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Frequently asked questions
Can one document cover both?
On minor schemes many authorities accept a single combined statement provided every policy requirement is addressed under a clear heading. On major applications they generally want them separately, because different officers review each. Check the local validation list first, since it usually names the documents the authority expects by title.
Where should the carbon calculation sit?
In the energy statement, in full, with the method and the output. The sustainability statement should carry a one paragraph summary and a cross reference. Splitting the same analysis across documents produces inconsistencies that officers find, and it creates four places to update when the heat strategy changes late.
What belongs only in a sustainability statement?
Water efficiency against the local target, materials and responsible sourcing, construction and operational waste, climate adaptation including planting and permeable surfaces, a summary of sustainable transport, and health and wellbeing. Give the last of these real figures such as amenity space areas and cycle storage rather than general statements.
Do I need a BREEAM pre-assessment at application stage?
Where a local plan sets a BREEAM rating requirement for non domestic development, yes, to show the target is achievable. It must be prepared by a licensed assessor. The design stage and post construction certificates follow later, normally secured by condition, and professional review of any draft is strongly advised.
What conditions follow from these documents?
Typically implementation of the approved energy strategy, renewables installed before occupation, and sometimes a post construction verification report. From the sustainability statement, conditions on water efficiency, the BREEAM rating, a materials schedule and a site waste plan. Read the draft wording before committee rather than after the decision notice.
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.