In a city like London, where commercial energy consumption is high and sustainability goals are tightening, the need for reliable energy auditing companies has never been more urgent. From ensuring legal compliance under schemes like ESOS and SECR, to unlocking long-term cost savings and reducing carbon emissions, professional energy audits have become essential across industries.
Whether you’re managing a single commercial property or overseeing a portfolio of buildings across London, working with a certified, experienced auditing firm helps identify energy inefficiencies and create actionable plans for improvement. Many companies also provide support with energy monitoring, compliance certificates (like EPCs), and decarbonisation strategies to meet the UK’s net-zero targets.
Below, we’ve featured ten of the most trusted energy auditing companies in London for 2026, selected based on service quality, reputation, certifications, and verified public reviews. You can explore their details in the sections that follow and for your convenience, we’ve also embedded them in the interactive map below to help you locate a provider near you.
What Is an Energy Audit and Why Is It Important for UK Businesses?
Energy audits are essential tools that help businesses understand how energy is used across their operations and where improvements can be made. In cities like London, where commercial and industrial energy usage is high and regulations are tightening, conducting regular energy audits is becoming a necessity rather than an option.
UK businesses face regulatory requirements such as the Energy Savings Opportunity Scheme (ESOS) and must also comply with energy performance standards like EPC ratings and SECR reporting. Aside from compliance, audits help businesses reduce energy waste, lower carbon emissions, and identify cost-saving opportunities ultimately contributing to sustainability goals and improving operational efficiency.
What Are the Top 10 Energy Auditing Companies in London in 2026?
1. Energy Compliance Solutions – “Compliance‑Focused Energy Auditing for UK Businesses”
Energy Compliance Solutions is a London‑based consultancy specialising in regulatory energy audits and environmental compliance. The company works with SMEs and large organisations to meet ESOS, SECR, and EPC obligations.
Their audit reports focus on clarity, accuracy, and practical implementation rather than generic recommendations. With a strong understanding of UK energy legislation, they support clients through audits, reporting, and ongoing compliance planning. The firm is known for structured processes and reliable turnaround times.
Many London businesses value their professional communication and audit transparency. Their services are tailored to commercial properties across multiple sectors.
Core Focus
Regulatory energy audits and UK compliance reporting.
Ideal Clients
Businesses requiring ESOS, SECR, or EPC compliance support.
- Website: https://energyandcompliance.co.uk/
- Phone: 0203 815 6582
- Address: 27 Old Gloucester St, London WC1N 3AX
- Email: enquiries@energyandcompliance.co.uk
2. Carbon Trust Advisory Services – “Strategic Energy and Carbon Expertise”
Carbon Trust Advisory Services is a globally recognised organisation supporting energy efficiency and carbon reduction. In London, they provide advanced energy audits aligned with long‑term sustainability and net‑zero goals.
Their work goes beyond compliance, offering strategic insight into emissions reduction and energy transformation. They frequently advise large corporations and public sector bodies. Their recommendations are evidence‑based and supported by extensive research.
The organisation is respected for technical credibility and independent guidance. Their audits are often used to inform corporate sustainability reporting.
Primary Strength
Carbon reduction strategy and high‑level energy auditing.
Best Suited To
Large organisations and public sector institutions.
- Website: https://www.carbontrust.com
- Address: The Carbon Trust, Level 5, Arbor, 255 Blackfriars Road London SE1 9AX
- Email: Contact form available online
3. NRG Assessments – “Fast and Reliable Energy Certification Services”
NRG Assessments is a well‑known energy assessment provider operating across London. The company focuses on EPCs, TM44 inspections, and energy performance reporting.
They are widely used by landlords, property managers, and commercial building owners. Their service is valued for efficiency, accuracy, and accessibility. NRG Assessments maintains government accreditation for energy assessments.
Their experience covers both residential and commercial properties. Clients often highlight their responsiveness and straightforward reporting.
Service Specialism
Energy performance certificates and compliance inspections.
Recommended For
Property owners and managing agents in London.
- Website: https://www.nrgconsultantgroup.co.uk/
- Address: College House, 2nd Floor, 17 King Edwards Road, London, Middlesex HA4 7AE
- Email: info@nrgconsultantgroup.com
4. EMS Energy Consultancy – “Practical Energy Management Solutions”
EMS Energy Consultancy delivers detailed energy audits with a strong emphasis on operational efficiency. Their London‑based team works with industrial and commercial clients to understand real‑world energy usage.
The consultancy combines audits with monitoring and energy management planning. Their reports are designed to support measurable reductions rather than theoretical advice.
EMS has experience across manufacturing, logistics, and large commercial facilities. Their approach focuses on long‑term improvement. Clients often use EMS audits to guide investment decisions.
Technical Expertise
Industrial and commercial energy management audits.
Suitable For
Organisations with complex energy usage patterns.
- Website: https://www.emsgroupuk.com/
- Phone: 0800 3581100
- Address: 3rd Floor, 207 Regent Street, London W1B 3HH
- Email: info@emsgroupuk.com
5. London EPC – “Straightforward EPC Services Across London”
London EPC is a specialist provider of domestic and commercial energy performance certificates. The company serves all London boroughs and focuses on efficient delivery.
Their services are commonly used for property sales, rentals, and compliance checks. London EPC is known for affordability and fast booking availability.
Their assessors are government approved and familiar with local requirements. The company is frequently recommended by landlords and agents. Their scope is clearly defined around EPC compliance.
Main Offering
Domestic and commercial EPC assessments.
Best Matched With
Landlords and small businesses requiring EPCs.
- Website: https://www.londonepc.co.uk
- Phone: 020 8016 2109
- Address: 87 Charterhouse St, London EC1M 6HJ
- Email: info@londonepc.co.uk
6. Green Zone Surveys – “Technical Building and Energy Assessments”
Green Zone Surveys provides advanced building diagnostics alongside energy audits. Their London‑based services include thermal imaging, air pressure testing, and compliance assessments.
The company works closely with developers, contractors, and local authorities. Their audits support planning approval and building performance validation.
Green Zone Surveys is recognised for technical accuracy and professional reporting. Their services are often used on large or complex developments. They combine energy insight with building science expertise.
Key Capability
Technical energy and building performance surveys.
Most Appropriate For
Developers and construction‑focused projects.
- Website: https://www.greenzonesurveys.co.uk
- Phone: 0344 499 7574
- Address: 48 Southport Road, Ormskirk L39 1QR
- Email: info@greenzonesurveys.com
7. Briary Energy – “Energy Strategy for New Developments”
Briary Energy focuses on energy assessments for new builds and development projects. They support planning applications through SAP and SBEM calculations.
Their London clients include developers and architects seeking Part L compliance. The company provides clear documentation aligned with UK building regulations. Their services help ensure energy efficiency from design stage. Briary Energy is known for structured technical reporting. Their work is particularly relevant in residential and mixed‑use developments.
Area of Expertise
New‑build energy modelling and compliance.
Best Fit For
Property developers and planning consultants.
- Website: https://www.briaryenergy.co.uk
- Phone: 1st Floor, Bishops Court, 17a The Broadway, Hatfield, AL9 5HZ
- Address: 0330 223 6960
- Email: info@briaryenergy.co.uk
8. EAL Consult – “Independent Energy and Carbon Consultancy”
EAL Consult offers independent advice on energy use and carbon reduction. Their London‑based projects often involve complex commercial and institutional buildings. The consultancy supports audits, retrofit planning, and sustainability strategies. Their recommendations are evidence‑driven and tailored to client needs.
EAL Consult works with public sector bodies and private organisations alike. Their expertise supports long‑term energy performance improvements. They are valued for impartial, technically sound advice.
Consultancy Focus
Energy audits and carbon strategy development.
Ideal Organisations
Public sector and large commercial buildings.
- Website: https://www.ealconsult.com
- Phone: 020 8930 5668
- Address: 17 Dobree Avenue London NW10 2AD
- Email: contact page
9. Enistic – “Digital‑Led Energy Compliance and Auditing”
Enistic provides energy audits supported by digital platforms and analytics. They are particularly active in ESOS and SECR compliance. Their London clients include multi‑site and large enterprises.
Enistic combines data‑driven insights with regulatory expertise. Their tools allow ongoing tracking beyond the initial audit. The company is recognised for innovation in energy reporting. Their services suit organisations with complex reporting needs.
Distinct Advantage
Technology‑driven energy audit solutions.
Best For
Large organisations managing multiple sites.
- Website: https://www.enistic.com
- Phone: 01865 598776
- Address: Chatsworth House, East Point Business Park, Littlemore, Oxford OX4 6LB
- Email: info@enistic.com
10. IRT Surveys – “Thermal Imaging for Energy Loss Detection”
IRT Surveys specialises in infrared thermographic surveys to identify energy inefficiencies. Their London‑based services focus on detecting heat loss, insulation failure, and building defects.
These insights complement traditional energy audits. The company works with commercial property owners and facilities managers. Their findings are evidence‑based and visually supported.
IRT Surveys provides practical data for targeted improvements. Their services are particularly useful for retrofit planning.
Survey Expertise
Infrared thermal energy diagnostics.
Well Suited To
Buildings requiring detailed heat‑loss analysis.
- Website: irtsurveys.co.uk
- Phone: 01382 228 700
- Address: Unit F, Prospect Business Centre, Dundee, DD2 1TY
- Email: info@irtsurveys.co.uk
How Do These Energy Auditing Companies Compare Based on Reviews and Services?
The table below provides a side-by-side comparison of each company’s core offerings and credentials:
| Company Name | Avg. Rating | Core Service | Certifications | Sector Focus |
| Energy Compliance Solutions | 4.9 | ESOS & Compliance Audits | ISO 50001, CIBSE | SME & Corporate |
| Carbon Trust | 4.6 | Net Zero & Sustainability | PAS 2060, BREEAM | Corporate & Public |
| NRG Assessments | 4.8 | EPCs, TM44 | Government Accredited | Residential & Comm. |
| EMS Energy Consultancy | 4.5 | Industrial Energy Management | ESOS Lead Assessor | Industrial |
| London EPC | 4.9 | EPC Certifications | Government EPC Provider | Property Sector |
| Green Zone Surveys | 4.7 | Technical Surveys & Testing | ATTMA, UKAS | Construction |
| Briary Energy | 4.6 | SAP/SBEM Compliance | BRE Approved | Developers |
| EAL Consult | 4.5 | Carbon Strategy & Consulting | ISO 50001, RICS | Public Sector |
| Enistic | 4.4 | Digital Compliance Tools | ESOS Registered | Large Enterprises |
| IRT Surveys | 4.6 | Thermal Imaging | ISO 9001, Thermography II | Commercial |
What Services Do Energy Auditing Companies in London Commonly Offer?
London-based energy auditors typically offer services tailored to compliance, cost-saving, and sustainability goals. These include energy performance certifications like EPCs, regulatory audits for schemes such as ESOS and SECR, and more detailed diagnostics such as thermal imaging or air leakage testing.
Some firms focus exclusively on commercial buildings, while others serve residential and new-build developers. Increasingly, digital monitoring tools are part of audit offerings, helping clients continuously track and optimise their energy usage over time.
How Can Energy Audits Help You Save Costs and Improve Compliance?
The financial and regulatory benefits of energy audits are substantial. Many businesses discover hidden inefficiencies in lighting systems, heating and cooling equipment, or outdated insulation. These inefficiencies, once identified, can often be resolved with simple upgrades that pay for themselves within months.
Additionally, being audit-compliant ensures your business avoids penalties under ESOS or similar regulations. It also strengthens your reputation as a responsible and sustainable organisation, which can be valuable when bidding for contracts or applying for grants.
What Should You Consider Before Hiring an Energy Auditing Firm?
Not all auditing companies offer the same depth of analysis or specialisation. It’s crucial to check whether the firm is certified, particularly for services like ESOS Phase 3 audits or SAP assessments. You’ll also want to evaluate their experience in your specific industry, whether they offer customised reporting, and what kind of post-audit support is available.
In 2026, more firms are offering cloud-based tracking and follow-up services, which allow for ongoing energy optimisation rather than a one-time report.
Why Does Working with a London-Based Company Make a Difference?
Choosing a local firm comes with several advantages. A London-based provider can often respond faster to site visits and urgent queries. They’re also more likely to understand borough-level planning policies, infrastructure quirks, and the unique energy challenges faced by buildings in the capital.
Moreover, supporting local businesses contributes to the city’s economic sustainability, aligning well with broader environmental goals.
Conclusion
Your ideal provider will depend on your business type, property portfolio, compliance deadlines, and energy goals. While all ten companies listed here are well-reviewed and trusted by UK clients, the right fit depends on whether you need a simple EPC, a full ESOS report, or strategic energy planning.
Use this guide to shortlist providers, compare services, and request detailed quotes. Most importantly, ensure they have the right certifications, a proven track record, and the expertise to guide your business toward meaningful energy efficiency.
FAQs About Energy Auditing in the UK
How much does a commercial energy audit cost in London?
Prices can range from £500 to £3,000 depending on building size, complexity, and the audit’s scope.
Are energy audits required by law in the UK?
Yes, especially for large businesses under ESOS regulations and properties needing valid EPCs for rental or sale.
How is an EPC different from a full energy audit?
An EPC is a basic rating of a building’s energy performance, while a full audit examines usage patterns, systems, and offers specific efficiency recommendations.
What sectors benefit most from energy auditing?
Sectors with high energy demand, such as retail, hospitality, manufacturing, and healthcare, benefit significantly.
How long is an energy audit valid for in the UK?
ESOS audits are valid for four years; EPCs typically last 10 years unless changes are made to the building.
What grants or incentives are available for energy efficiency in 2026?
Schemes like the Boiler Upgrade Scheme and government green incentives are expected to continue. Always refer to gov.uk for the latest updates.
Can energy audits help businesses reduce emissions effectively?
Absolutely. Audits provide the data needed to create targeted carbon reduction strategies and support net-zero goals.