Energy Statements

Local authorities currently have the power to set energy efficiency and emissions targets above those in Part L of the UK Building Regulations.  As part of these local policies it is commonly requested that an Energy Statement is submitted as part of a detailed planning application. This is to provide evidence of how the developer plans to achieve the local carbon reduction targets and/or specific energy efficiency clauses.


An energy statement is designed to address energy objectives such as carbon emissions and renewables energy targets. It will detail the methods and technologies being used to reduce emissions, the savings this will create and a comparison of the development against the one which was constructed to baseline figures (Part L compliance standards).


Typically an Energy Statement will include:

  • Baseline annual CO2 emissions

  • Baseline annual energy costs

  • Details on the fabric improvements being made (a fabric first approach)

  • Details on the installed heating, cooling, ventilation and lighting technologies

  • A low and zero carbon (LZC) feasibility assessment

  • Actual figures for CO2 emissions and energy costs (with the installed technology and improved fabric approach)

  • A comparison between the baseline and actual figures

The data used within an Energy Statement is gathered from the initial SAP (domestic) or SBEM (commercial) calculations. These calculations can be used at Design Stage for the Building Regulations Reports and at completion for the required Energy Performance Certificate. 

Sustainability Statements

A Sustainability Statement is a report requested by local planning authorities which details a development's strategy to meet standards set out in local planning policies.


Typically a Sustainability Statement will include sections on:

  • Energy

  • Water

  • Waste & Pollution

  • Transport

  • Community & Social Provision

  • Biodiversity & Natural Surroundings

  • Construction Materials

  • Construction Techniques & Impacts

  • Local Economic Impact

A well written Sustainability Statement can play a significant part in helping your development receive planning permission. We often find developers submit them on a voluntary basis as it adds value to an application and minimises potential issues from the outset.

Part G Water Efficiency Calculations

Building Regulations require that new dwellings meet minimum standards for water efficiency within a dwelling. A maximum amount of 125 litres per person per day (internal potable water) is the minimum standard, with local planning conditions often being set to reduce this down to 105 litres. 

Evidence to demonstrate the compliance of a development with this regulation is given by means of a water efficiency calculation. This calculation is based on occupancy, fittings and flow rates. 


During the design stage, and when purchasing fittings, it is essential to consider the water efficiency calculation and the effect which each fitting will have on the result. Low flow showers, dual flush toilets and smaller baths may be fitted to help achieve compliance along with flow restrictors (ideal on retrofit cases where compliance hasn't been achieved), efficient appliances and even rainwater recycling installations. 

By sending us a list of your preferred fittings, we can calculate whether they meet the required efficiency standards or whether improvements need to be made. We will advise on where we feel these improvements would be best made and then re-run the calculations as needed until the desired outcome is achieved.  



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