Proposed amendments to the Energy Rating of Dwellings assessment procedure


Energy efficiency regulations are continuing to evolve, with the latest version of the Standard Assessment Procedure (SAP) having been published in July 2018, following a consultation process launched in November 2016. The SAP10 document incorporates a number of changes to the procedure and background figures, intended to more accurately reflect the energy consumption of dwellings and adapt the methodology to a changing environment and wider energy system.

AES Sustainability Consultants has reviewed and analysed the proposed document in order to get a clear picture of the potential impact on the housebuilding industry. The documents below provide an overview and impact assessment based on what we currently know. It is anticipated that a consultation on revisions to Part L of the Building Regulations will be launched in Spring 2019 and the amended methodology would be adopted following the conclusion of this process.

If you have any questions about the impact of these changes on your business in the future,

please contact us to discuss and we’ll be pleased to help.


Impact Assessment – Criterion 3 SAP 2016

SAP10 – AES Commentary – 03-10-18

What is the point of BREEAM?

BREEAM… Do you even know what it stands for?

BREEAM Green planet

As a BREEAM Assessor sometimes the most common answer I hear to the above question is ‘client wants it’ or ‘to satisfying that planning condition’. I have written this note as a beginners guide and reminder to professionals of why the construction industry needs BREEAM.

It is well known that the construction industry has huge environmental impacts on our planet. The United Nations Environment Programme (UNEP, 2012) state that the current global built environment is responsible for:

  • 30% of greenhouse gas emissions
  • 3 billion tonnes of raw materials per annum
  • 20% of global water usage
  • 30-40% of global energy consumption

The Environment Agency (2007) report that 50% of greenhouse gas emissions in the UK are caused by the energy used in constructing, occupying and operating buildings.

BREEAM seeks to reduce these impacts by encouraging developers and businesses to make positive changes.

What is BREEAM?

BREEAM stands for the Building Research Establishment Environmental Assessment Method.  It is a certification scheme to categorise, assess and rate buildings based on a standardised set of criteria.  BREEAM is operated by the BRE who are an independent trust and so are separate from the government and firms.  This allows the BRE to be both objective and credible.

What is the point of BREEAM?

Here are the six main aims of BREEAM:

Deliver Sustainable Solutions

BREEAM aims to push developments to go beyond the minimum standards and regulations

Provide a holistic framework

There are a wide range of sustainability issues that need to be considered through the life cycle stages of the development process.  BREEAM provides a weighting to different sustainability issues which are then combined to make a single score.  Therefore if you maximise the score you automatically maintain the balance.

Based on sound science

The BREEAM framework is based on scientific research with industry wide consultations.

Measure what is important

Sustainable developments consists of economic, social and environmental issues, it is easy to measure the economic impacts by looking at a purchase receipt.  BREEAM aims to make the environmental and social impacts just as easy to measure.

Support a process of change

BREEAM aims to recognise and reward developments that have gone beyond simple regulations.  BREEAM therefore provides a framework for the government to set direction and incorporate requirements in to planning legislation.

Deliverer of value for buildings and their occupants

BREEAM can deliver value through reduced running costs through less energy, water and waste consumption during both the construction and operational phase.  In addition a building that works for its occupants as BREEAM includes aspects of stakeholder participation, air quality, thermal comfort, good acoustics, safe and security issues to name but a few


If you have any questions or enquiries around BREEAM Assessments please do not hesitate to contact us.

Redrow River Dart Challenge

AES Consultants ready for their walk for Redrow

Redrow Homes – River Dart Charity Challenge 2018

On Friday 14th September, four consultants from AES attended the Redrow Homes River Dart Charity Challenge Day to raise money for two local charities; Rowcroft Hospice and cancer charity FORCE.

Jonathan, Ross, Laura and Yasmin volunteered to undertake the 12km hiking phase of the challenge.  The hike started in the town of Totnes, meandering along the River Dart until finishing in the beautiful village of Dittisham.  Whilst there were some tough hill climbs they were also rewarded by many stunning views of the Devon countryside.

12km walk from Totnes to Dittisham for Redrow

Thankfully the British weather was kind and despite a few blisters they all had a fantastic day raising money for two great causes. 50 people took part in this relay event, incorporating 4 different modes; cycling, running, walking and dragon boating. So far over £5,000 has been raised with more being collect through sponsorship. We would like to thank the staff at Redrow Homes for organising such a fantastic charity challenge and for inviting us to take part.

For more information on these fantastic charities please see below and follow the links Rowcroft Hospice and Force

Rowcroft Hospice

Every year Rowcroft Hospice provide care to over 2,000 patients living with life-limiting illnesses in South Devon, completely free-of-charge.  Rowcroft’s specialist and dedicated services include a 12-bedded Inpatient Unit (IPU), community services, a 24/7 Hospice at Home service to care for people at home in the last two weeks of life, and outpatient services.  The total cost of running our services is £8m per annum, with a 29% contribution from the NHS and so more than 70% of their services are therefore funded by donations.


FORCE (Friends of the Oncology and Radiotherapy Centre, Exeter) provides a vital role in providing local cancer services.  FORCE has contributed more than £10 million to improving the quality of treatment and care available in Exeter for cancer patients and their loved ones.  FORCE have funded £2 million worth of state-of-the-art equipment and anyone treated for cancer locally is likely to have benefited from hardware purchased by FORCE.


Accredited CPD – BREEAM UK New Construction

CPD Certified

BREEAM UK New Construction 2018

AES Sustainability Consultants, are proud to inform our clients that we have an accredited CPD, outlining the basic concepts, procedures and objectives of BREEAM 2018.

This CPD delivers the following learning:

  • To understand how schemes are classified under BREEAM UK New Construction 2018;
  • To understand the criterion involved in the assessment process and the weightings/contributions to achieving an overall sustainability score;
  • To be aware of minimum standards and pre-requisite requirements associated with achieving particular BREEAM scores;
  • To understand the role of a BREEAM assessor;
  • To understand the standard of evidence that is required for assessment and how it is assessed;
  • To explore the advantages that BREEAM can deliver to your development;
  • To acknowledge crucial considerations to ensure you achieve the most from BREEAM.

“Engaging in Continuing Professional Development ensures that both academic and practical qualifications do not become out-dated or obsolete; allowing individuals to continually ‘up skill’ or ‘re-skill’ themselves, regardless of occupation, age or educational level.”

This BREEAM 2018 CPD is deliverable at our office in Tiverton or an AES representative can come to you. If you wish to learn more about our BREEAM 2018 CPD, please contact us.

Bee Meadow – Baker Estates

Baker Estates Ltd
Source: Baker Estates

AES have been proud to work for Baker Estates on the first phase of this high-quality rural housing development. Bee Meadow utilises a timber frame construction alongside high-quality materials to ensure Building Regulations are met through a robust and lasting specification.

With the second phase already underway, we are looking forward to being involved in the evolution of the wider development, ensuring that new, high quality and energy efficient homes are available within a thriving local community.


WELL Building Standard The International WELL Building Institute launched the WELL Building Standard version 1 in 2014.

Grounded on medical research, the WELL Building Standard (WELL) is a performance-based system for measuring, certifying and monitoring features of the built environment that impact on human health and well-being. Today there are now 109 certified WELL projects and 840 WELL registered projects worldwide.

In May 2018, the WELL version 2 (v2) pilot was launched, this is the next version of the pioneering WELL Building Standard.  The WELL v2 standard presents a set of requirements for ten relevant factors, or Concepts; Air, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind and Community.  Placing people’s well-being at the heart of design and construction can enhance their health and experience, generate savings in medical and productivity costs, and so add value to real estate assets.

AES Sustainability Consultants, are pleased to announce that BREEAM Consultant Yasmin Spain is a qualified WELL AP (Accredited Professional) and will enable us to offer the WELL AP project role in addition to our BREEAM Services in a commercially viable manor.


Welcome New Starters…

Image of 6 new employees at AESSC

We had a very successful recruitment drive this Spring, we have now grown our team by 6 more employees!

Edward Brown (Top Left), Charlotte Dutton (Top Middle), Edward Ettling (Top Right) and Ben Westall (Bottom Middle) have all joined us a Graduate Sustainability Consultants and have just completed their 3-week intensive training with Ross. They will now be mentored by members of the team for the next 18 weeks whilst they complete design stage SAP calculations.

Danni-Marie Chant (Bottom left) joined us in June as a Technical Administrator, providing support to the consultant team in the production of Energy Performance Certificates (EPCs).

Yasmin Spain (Bottom Right), our newest recruit who started yesterday, has relocated from London to join us as an experienced BREEAM Consultant.

I am sure you will all join me in welcoming our newest employees. Keep an eye on our careers page if you would like the opportunity to join our growing team.

Upcoming changes to SAP and Part L – What we know so far…

You may be aware that there is some discussion in the industry relating to an update to the energy assessment procedure for residential developments, generally referred to as SAP10, or SAP2018.

  It’s important to note that until the final document is published – which we expect to be sometime this summer – we only have the government response to the SAP consultation to guide us as to what this may look like. Following this, a consultation on changes to Part L itself can be expected towards the end of the year, which may introduce further and potentially more wide-ranging changes to be adopted in 2019.

At this stage, it appears there will be a number of minor technical amendments to SAP, as well as some more substantial changes which could have an impact on your current strategy for Part L1A 2013 compliance.

Some of these changes are likely to bring improvements in assessed performance, however the majority may make it more challenging to achieve compliance;

  • Changes to carbon emissions factors, the most significant of which is a reduction in the emissions from electricity of around 23%, to reflect progress that has been made in decarbonising the National Grid. This is likely to make electric heating systems more viable, however conversely would reduce the benefit from PV systems currently used to meet carbon reduction targets, leading to larger systems being required.
  • Changes to the assessment of thermal bridging, to remove the use of the ‘approved’ values associated with using Accredited Construction Details (ACDs) and worsen the default values. For many clients, we already mitigate this impact through ensuring that all your main building junctions are thermally modelled. We can calculate these on a one-off basis, or build a full library based on your standard detailing to use on future projects.
  • A more accurate assessment of hot water consumption would require us to account for the energy consumption and emissions from electric showers – which are overlooked in the current methodology – as well as more accurately reflect the design flow rates.
  AES are involved with various industry groups which guide and discuss this area of the Building Regulations, so we’re keeping abreast of developments and will provide an update when we have more definitive news. There may also be other changes in the future relating to compliance and enforcement, which are expected to now be on the agenda following the conclusion of the Hackitt Review – again, you’ll know when we know.

Please get in touch if you’d like to discuss any of the above, or anything you’ve heard on the grapevine in relation to the changes. As soon as any final documentation is published, the team at AES will analyse the impacts and publish a further newsletter to advise you of any implications.

As always, we will work with you to find value-engineered solutions that work for your business.

Lunchtime CPD: ISO Energy

“The CPD was useful. For example, we learnt about bolt-on renewable technologies from an installer’s perspective.”

Calum of ISO Energy recently provided our consultants with their June lunchtime CPD (Continuing Professional Development). 

When the consultants apply these renewable technologies in SAP they will have more of an understanding of the feasibility and the practical implications. For example, they learnt that if a ground source heat pump (which is too big) is installed, it can lead to the ground freezing!

Learning of the maintenance and payback costs for renewable technologies provided the consultants with a more holistic view, including the experience of these technologies at post-construction stage.

Calum of ISO Energy 

“It was interesting to learn of new lesser known technologies – e.g.heat exchanges in rivers and small-scale hydro.” 

“I now have more of an idea of a homeowner’s perspective – payback periods and RHI” 

” I learnt the impacts associated with sizing renewable technologies and installing correctly to ensure efficiency (including what happens when it goes wrong).”

” I now have someone to contact with questions regarding practicality.”

Would you like to provide our consultants with a lunchtime CPD? Please Contact us here to arrange.

10 Years of Service

This month we had the pleasure of recognising Greg Lock’s 10 years of service celebration

Fraser Hall (Left) and Greg Lock (Right)

Greg is a Senior Team Manager at DALTEC Ltd (our sister company) and has been with the company since those days when it operated from a shed in Jon’s garden.

10 years of dedicated service to our clients and to our Company is a noteworthy achievement and to commemorate this milestone in Greg’s career, the Director of DALTEC Ltd Fraser Hall, presented a personalised hip flask (Tin is the recognised tradition for a 10 year anniversary). 

We would like to take this opportunity to thank Greg for his loyalty, hard work and professionalism. We look forward to another 10 years of working with Greg…