Schemes explained

Stroma Certification offers a number of schemes to certify the capabilities and competence of installers, assessors and organisations throughout the energy efficiency and construction sectors and beyond. Certification awarded through our schemes enables energy assessors, tradespeople and businesses to carry out work which is recognised as meeting the requirements of relevant industry and Government standards and bodies.

We carry out regular audits and assessments of our members to determine that they remain compliant with industry guidelines and legislature. This ensures work is being carried out to a safe and high standard and enables our members to continue their membership of our schemes to carry out certified work. It is possible that our members may be certified under more than one of these schemes depending on their capabilities.

Assessor schemes

UKAS Accredited

Green Deal Assessor Organisation (GDAO)

GDAOs provide guidance and energy improvement advice in line with the Green Deal, a Government incentive designed to make energy-saving improvements and reduce energy consumption in UK homes, to installers who offer energy services directly to homeowners. Certification for GDAOs enable them to operate an approved register of companies who can install energy efficiency measures

Stroma Approved

Air Conditioning Energy Assessment (ACEA)

A scheme to certify assessors carrying out assessments of the efficiency and performance of air-conditioning systems and equipment.

Code for Sustainable Homes (CSH)

Certification for CSH assessors to check the levels of sustainability and energy efficiency (such as carbon dioxide emissions, waste and water usage) in new-build dwellings.

Domestic Energy Assessment (DEA)

Provides Domestic Energy Assessors (DEAs) with certification to carry out energy assessments in existing UK domestic properties. DEAs are also able to create and submit Energy Performance Certificates (EPCs) of the energy performance of these properties.

Public Building Assessment (DEC)

Certification for Public Building assessors to carry out energy assessments on public buildings and submit Display Energy Certificates (DECs) with all energy efficiency results of the building.

Domestic on Construction Energy Assessment (DOCEA)

Certifies energy assessors to perform assessments to determine the energy performance of new domestic properties in line with the requirements of the Standard Assessment Procedure (SAP).

Energy Savings Opportunity Scheme (ESOS)

Designed to certify Lead Energy Assessors assessing organisations for compliance with ESOS. ESOS is a mandatory energy assessment scheme for UK organisations (of a certain criteria) to determine if they are meeting energy performance requirements.

Non-Domestic Energy Assessment (NDEA)

Enables Non-Domestic Energy Assessors (NDEAs) to carry out energy assessments in non-domestic properties and submit corresponding energy performance reports through an EPC.


A certification scheme for Inventory Clerks carrying out inventories to determine the items and their condition in a property before and after occupation.


Enables energy assessors to check for the risk and the presence of legionella bacteria in a domestic rental property when carrying out energy assessments.

Section 63

Certification for NDEAs to lodge Section 63 Action Plans in Scotland. Section 63 requires an additional assessment and supporting Action Plan document alongside the EPC of non-domestic buildings over 1000m2 in Scotland to identify how the energy performance of these buildings can be improved.

Installer schemes

UKAS Accredited

Competent Person Scheme (CPS)

Some installation work requires a notification to Building Control in order to ensure the work complies with Building Regulations. Members of a Competent Person Scheme (such as electricians, plumbers and heating engineers) are allowed to make these notifications themselves.

PAS 2030

Allows an installer to perform the installation of Green Deal approved energy efficiency measures for a property such as double glazing and insulation.

Microgeneration Certification Scheme (MCS)

Provides certification for installers implementing renewable energy technologies such as solar panels and heat pumps.

Stroma Approved

Commercial Electrical

Certification for electricians carry out compliant electrical testing, assessment and maintenance work on commercial properties.

Third Party Electrical

Certifies electricians to sign off electrical work carried out by a third party that meets the requirements of the Building Regulations.

Portable Appliance Testing (PAT Testing)

Enables electricians to test and check the safety of electrical appliances and equipment such as kettles, cookers, storage heaters, laptops and more.

Cavity Clearance

Certifies installers to carry out cavity wall extraction of damaged cavity wall insulation to a competent standard.


Installer certification enables plumbers to check for the risk of legionella when working in domestic properties.

Company schemes

UKAS Accredited

ISO 9001

Certification for companies who effectively monitor quality management throughout their business processes and service to customers.

Stroma Approved

Building Information Modelling (BIM)

Helps organisations in the construction sector demonstrate compliance against the Government required BIM Level 2. BIM Level 2 provides a set of standards which businesses must meet in digitally managing all aspects of construction.

Group Competence Scheme (GCS)

Provides certification for organisations with a large gas installer workforce and ensures regular competency checks are carried out to ensure the gas work their organisation is carrying out is safe and compliant.

ISO 9001

This is another ISO 9001 Certification scheme provided via a different awarding body. It also certifies that an organisation is conforming to the international quality management standard.

ISO 14001

Certifies organisations with an effective Environmental Management System (EMS) in place to reduce their environmental impact throughout their business operations.

OHSAS 18001

Our Occupational Health and Safety (OH&S) Certification Scheme certifies organisations who have an effective management system in place which monitors the wellbeing and safety of their employees.

Find out more about Stroma Certification with our Consumer Advice, or call 0845 621 11 11 to speak to a member of our team.

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