This practical guide presents a selection of companies offering ESG assurance services in Birmingham and to organisations across the wider region. Rather than ranking companies, it gives a neutral overview of their ESG assurance capabilities, client focus, and related areas of expertise. The selection ranges from large companies with broad audit, sustainability, and risk capabilities to more focused specialists working with specific reporting, verification, or assurance requirements. The aim is to give readers enough context to understand what each company offers, where its strengths lie, and which type of organisation it may suit.
Acumon
Acumon is a UK firm of chartered accountants and registered auditors providing ESG assurance, statutory audit, risk, accounting, tax, and advisory services to organisations across the UK. Its ESG assurance work focuses on independent review of sustainability information, selected ESG metrics, reporting processes, and the controls behind published disclosures.
The firm supports organisations that need greater confidence in environmental, social, and governance information used by boards, investors, lenders, customers, and other stakeholders. Its ESG assurance engagements can cover greenhouse gas emissions, energy consumption, workforce data, governance statements, and other selected sustainability disclosures.
Acumon approaches ESG assurance through an audit-led framework. The firm reviews the processes used to gather ESG information, tests underlying data, assesses selected disclosures, and provides independent limited assurance where appropriate. This can be relevant to Birmingham organisations that want external scrutiny of sustainability information without limiting the engagement to financial reporting.
The firm also provides ESG reporting readiness reviews for organisations that are not yet prepared for formal assurance. These reviews examine data ownership, reporting processes, controls, and gaps between current reporting and stakeholder or regulatory requirements, with practical remediation steps identified before an assurance engagement begins.
Environmental reporting is another area of focus. Acumon reviews greenhouse gas and energy reporting methodologies, including emission factors, estimation methods, reporting boundaries, year-to-year consistency, and information prepared in connection with Streamlined Energy and Carbon Reporting requirements.
Acumon does not currently list a Birmingham office, but it supports clients across the UK through its UK-based team. Its current office network includes London, Pitstone, Aylesbury, Bournemouth, and Aberdeen, making the ESG assurance service available to Birmingham organisations that do not require their assurance team to be physically based in the city.
ESG Assurance Capabilities
Acumon provides ESG assurance across selected sustainability metrics, disclosures, reporting methodologies, and supporting controls.
These include:
- Independent limited assurance over selected ESG metrics and disclosures
- Greenhouse gas emissions and energy reporting reviews
- Streamlined Energy and Carbon Reporting methodology assessments
- ESG reporting readiness reviews
- Data-gathering and internal controls assessments
- Workforce and governance disclosure assurance
- Supply-chain and lender ESG questionnaire support
Assurance work can therefore focus on individual ESG indicators or extend to the processes and controls used to produce wider sustainability reporting.
Regulatory Licences and Registrations
Acumon operates within a regulated UK audit framework that supports its wider assurance work.
These include:
- ICAEW Registered Audit Practice status
- FRC authorisation for Public Interest Entity audits
- Jersey Recognised Auditor status
- Isle of Man Recognised Auditor status
- FCA exempt professional firm status
These registrations support assurance work under established audit quality and independence frameworks and allow Acumon to work with UK organisations as well as groups containing entities in Jersey and the Isle of Man.
Core Services
In addition to ESG assurance, Acumon provides services that connect sustainability reporting with wider financial reporting, governance, risk, and compliance requirements.
These include:
- ESG assurance
- ESG reporting readiness reviews
- Greenhouse gas and energy methodology reviews
- Statutory external audit
- Group and subsidiary audits
- Public Interest Entity audits
- Risk and technology assurance
- Internal controls and governance support
- Accounting, tax, and advisory services
Acumon can combine ESG assurance with statutory audit where this is appropriate while maintaining independence where a separate assurance engagement is required. Its broader audit and advisory capabilities can also support issues identified during reviews of ESG reporting processes and controls.
Acumon works with organisations that are:
- Preparing selected ESG disclosures for independent assurance
- Strengthening sustainability data collection and reporting controls
- Reviewing greenhouse gas and energy reporting methodologies
- Preparing for more formal ESG reporting requirements
- Responding to sustainability information requests from lenders or supply-chain partners
- Integrating ESG information into wider governance and reporting processes
A readiness review can be used before formal assurance to identify weaknesses in data ownership, documentation, reporting processes, and controls that could otherwise affect the assurance engagement.
Contact Information
- Website: acumon.com
- Phone: 020 8567 3451
- Email: [email protected]
- Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
PwC UK
PwC provides non-financial assurance covering sustainability and ESG information, including carbon and other environmental reporting. Its work can address the reliability of reported information, reporting processes, controls, and selected metrics rather than being limited to financial statements.
For Birmingham organisations, PwC has a city-centre office at One Chamberlain Square. Its combination of local audit capacity and broader sustainability assurance resources may suit larger businesses, listed groups, financial institutions, and organisations dealing with multiple reporting frameworks or stakeholder requirements.
Key Facts
- Core services: ESG assurance, sustainability reporting assurance, carbon reporting assurance, non-financial assurance
- Specialization: Independent assurance over ESG data, disclosures, processes, and controls
- Suitable for: Large companies, groups, regulated organisations, and businesses with complex reporting requirements
- Location: One Chamberlain Square, Birmingham
- Notable strength: ESG assurance supported by wider audit, reporting, risk, and sustainability capabilities
Contact Information
- Website: www.pwc.co.uk
- Phone: +44 (0)121 265 5000
- Email: [email protected]
- Address: One Chamberlain Sq, Birmingham B3 3AX, UK
- LinkedIn: www.linkedin.com/company/pwc-uk
- Facebook: www.facebook.com/PwCUK
- Instagram: www.instagram.com/pwc_uk
Deloitte
Deloitte provides sustainability assurance and reporting services for organisations that need independent review of ESG information and non-financial disclosures. Its UK practice covers assurance over sustainability metrics, greenhouse gas emissions, climate-related disclosures, workforce data, and other environmental and social indicators. The company provides limited and reasonable assurance under standards including ISAE 3000 and ISAE 3410, depending on the engagement scope.
Deloitte also supports ESG assurance readiness through gap analysis, reporting assessments, and reviews of existing metrics and disclosures before formal assurance begins. Its wider sustainability work includes ESG reporting advisory, climate-related reporting, sustainability-linked finance assurance, and support around major reporting frameworks. Deloitte has a Birmingham office at Four Brindleyplace, giving organisations in the region access to its wider UK sustainability and audit practice.
Key Facts
- Ideal for: Organisations managing complex data environments
- Core services: Privacy advisory, cyber risk, governance assessments
- Specialization: Technology risk and regulatory compliance
- Location: UK offices
Contact Information
- Website: www.deloitte.com
- Phone: +44 (0)121 632 6000
- Address: Four Brindleyplace Birmingham, B1 2HZ United Kingdom
- LinkedIn: www.linkedin.com/company/deloitte
- Facebook: www.facebook.com/deloitteuk
- Twitter: x.com/deloitteuk
Menzies LLP
Menzies provides ESG assurance alongside sustainability, accounting, audit, and advisory services. Its ESG work includes independent assurance over sustainability data and reporting, carbon footprint verification, governance and risk reviews, and assessments connected with environmental reporting requirements.
The firm can also carry out gap analysis and readiness work where sustainability information is not yet prepared for independent assurance. Menzies has a Birmingham office in The Colmore Building, giving local companies an option outside the largest international audit networks.
Key Facts
- Core services: ESG assurance, sustainability reporting support, carbon footprint verification, governance and risk reviews
- Reporting areas: ESG data, SECR-related information, sustainability disclosures
- Approach: Assurance combined with readiness and gap analysis where required
- Location: The Colmore Building, Birmingham
- Suitable for: Mid-market and privately owned businesses developing more formal ESG reporting processes
Contact Information
- Website: www.menzies.co.uk
- Phone: +44 (0)20 7387 5868
- Address: The Colmore Building, 20 Colmore Circus Queensway, Birmingham B4 6AT
- LinkedIn: www.linkedin.com/company/menzies-llp
- Instagram: www.instagram.com/menzies_llp
KPMG UK
KPMG’s UK sustainability assurance practice provides independent verification and assurance over ESG information and sustainability disclosures. Engagements can include readiness work before external assurance, followed by limited or reasonable assurance under recognised standards where the reporting subject is suitable.
Its Birmingham office at One Snowhill provides a local base for organisations seeking ESG assurance alongside financial audit, governance, reporting, climate, and broader sustainability expertise. This combination can be relevant where sustainability reporting is becoming part of established corporate reporting and control processes.
Key Facts
- Core services: Sustainability assurance, ESG verification, assurance readiness
- Assurance levels: Limited and reasonable assurance where appropriate
- Focus: ESG disclosures, sustainability metrics, reporting processes, and controls
- Location: One Snowhill, Birmingham
- Suitable for: Businesses integrating ESG information into broader corporate reporting and assurance frameworks
Contact Information
- Website: kpmg.com
- Phone: +44 (0)121 232 3000
- Address: One Snowhill, Snow Hill Queensway, Birmingham B4 6GH
- LinkedIn: www.linkedin.com/company/kpmg-uk
- Twitter: x.com/kpmguk
- Facebook: www.facebook.com/KPMG
Crowe UK
Crowe provides independent sustainability assurance as part of its wider audit, risk, and sustainability offering. Its published ESG work includes assurance over annual sustainability reporting, CDP-related information, and information connected with sustainability-linked lending arrangements.
The company also supports sustainability disclosures and reporting preparation. Crowe has established a presence in central Birmingham at One Colmore Row, while its broader Midlands practice provides audit and advisory services across the region.
Key Facts
- Core services: Sustainability assurance, ESG reporting support, sustainability consulting
- Assurance examples: Sustainability reports, CDP information, sustainability-linked lending data
- Specialization: Independent assurance combined with reporting and sustainability advisory support
- Location: Central Birmingham and wider Midlands presence
- Suitable for: Companies seeking assurance over selected ESG disclosures or externally reported sustainability information
Contact Information
- Website: www.crowe.com
- Phone: +44 (0)20 7842 7100
- Email: [email protected]
- Address: 55 Ludgate Hill, London, EC4M 7JW
- LinkedIn: www.linkedin.com/company/crowe-uk
- Twitter: x.com/CroweUK
- Instagram: www.instagram.com/crowe_uk
Grant Thornton UK
Grant Thornton provides ESG and non-financial assurance covering sustainability information, greenhouse gas reporting, and other non-financial disclosures. Its offering includes assurance readiness work as well as independent engagements under ISAE 3000 and ISAE 3410.
The Birmingham practice operates from 103 Colmore Row. This makes Grant Thornton a locally accessible option for privately owned businesses, corporate groups, public sector organisations, and other entities that want ESG assurance from a firm that also handles statutory audit, accounting, tax, and risk work.
Key Facts
- Core services: ESG assurance, non-financial assurance, assurance readiness
- Assurance areas: Sustainability information, greenhouse gas data, selected non-financial disclosures
- Standards: ISAE 3000 and ISAE 3410 where relevant
- Location: 103 Colmore Row, Birmingham
- Suitable for: Mid-market, corporate, public sector, and not-for-profit organisations
Contact Information
- Website: www.grantthornton.co.uk
- Email: [email protected]
- Phone: +44 (0)121 212 4000
- Address: 17th Floor 103 Colmore Row Birmingham B3 3AG
- LinkedIn: www.linkedin.com/company/grant-thornton-uk
- Instagram: www.instagram.com/gt_trainees
RSM UK
RSM provides non-financial assurance across a broad set of ESG indicators. Its published assurance capabilities include greenhouse gas, carbon and energy data, nature-related metrics, diversity and inclusion information, social impact, sustainable finance information, and certain supply-chain claims.
The firm’s sustainability assurance work uses recognised standards including ISAE 3000 and ISAE 3410 where applicable. RSM has a Birmingham office at 103 Colmore Row, making the service accessible to businesses in the city and across the West Midlands.
Key Facts
- Core services: ESG assurance, sustainability assurance, non-financial reporting assurance
- Assurance areas: Carbon, energy, nature, workforce, social impact, sustainable finance, supply-chain information
- Standards: ISAE 3000 and ISAE 3410 where applicable
- Location: 103 Colmore Row, Birmingham
- Suitable for: Businesses needing assurance across environmental and social metrics rather than carbon data alone
Contact Information
- Website: www.rsmuk.com
- Phone: +44 (0)1782 216130
- Address: 10th Floor, 103 Colmore Row, Birmingham, B3 3AG
- LinkedIn: www.linkedin.com/company/rsm-uk
- Instagram: www.instagram.com/rsm.uk
BDO UK
BDO provides ESG readiness and assurance services designed to help organisations move from internally prepared sustainability information toward independent external assurance. Its work can include assessing the controls and processes behind ESG metrics, pre-assurance readiness reviews, and limited assurance engagements.
The firm references ISAE 3000 and ISAE 3410 within its ESG assurance approach. BDO’s Birmingham office at Two Snowhill serves organisations across Birmingham and the wider West Midlands, giving businesses a local option for combining ESG work with financial audit, risk, accounting, and tax services.
Key Facts
- Core services: ESG readiness, sustainability assurance, controls assessment
- Assurance scope: ESG metrics, greenhouse gas information, reporting processes
- Standards: ISAE 3000 and ISAE 3410 where relevant
- Location: Two Snowhill, Birmingham
- Suitable for: Organisations that need to improve ESG reporting controls before seeking independent assurance
Contact Information
- Website: www.bdo.co.uk
- Phone: 0121 352 6200
- Address: Two Snowhill Birmingham, B4 6GA, United Kingdom
- LinkedIn: www.linkedin.com/company/bdo-llp
- Instagram: www.instagram.com/bdo_uk
EY UK
EY provides assurance over non-financial and sustainability reporting, including ESG disclosures, data, targets, KPIs, climate information, and carbon-related reporting. Its sustainability assurance work can extend from selected performance indicators to broader reporting and control environments.
EY also describes limited and reasonable assurance approaches under recognised non-financial assurance methodologies. Its current Birmingham office is at One Colmore Square, providing a local base for companies that need sustainability assurance supported by wider audit, climate, reporting, and risk capabilities.
Key Facts
- Core services: Sustainability assurance, non-financial reporting assurance, climate and ESG reporting
- Assurance areas: ESG disclosures, KPIs, targets, climate information, carbon data
- Assurance levels: Limited and reasonable assurance depending on engagement scope
- Location: One Colmore Square, Birmingham
- Suitable for: Large and complex organisations with extensive sustainability reporting requirements
Contact Information
- Website: www.ey.com
- Phone: +44 121 535 2000
- Address: One Colmore Square, Birmingham B4 6HQ
- LinkedIn: www.linkedin.com/company/ernstandyoung
- Facebook: www.facebook.com/EY
- Twitter: x.com/EYnews
Forvis Mazars UK
Forvis Mazars provides independent ESG and sustainability assurance covering sustainability disclosures, ESG KPIs, greenhouse gas information, and other non-financial reporting. Its UK offering includes both limited and reasonable assurance, supported by standards including ISAE (UK) 3000 and ISAE 3410.
The firm also provides readiness services for organisations preparing for mandatory or voluntary sustainability assurance. Its Birmingham office is at Three Chamberlain Square, giving companies in the region local access to assurance, audit, accounting, risk, and sustainability specialists.
Key Facts
- Core services: ESG assurance, sustainability assurance, reporting readiness
- Assurance areas: Sustainability disclosures, ESG KPIs, greenhouse gas data, selected social information
- Standards: ISAE (UK) 3000 and ISAE 3410, with preparation for evolving sustainability assurance requirements
- Location: Three Chamberlain Square, Birmingham
- Suitable for: Businesses preparing for more formal sustainability reporting and external assurance requirements
Contact Information
- Website: www.forvismazars.com
- Phone: +44 (0) 121 232 9500
- Address: 3 Chamberlain Square, Birmingham, B3 3AX, United Kingdom
- LinkedIn: www.linkedin.com/company/forvis-mazars-in-the-uk
- Twitter: x.com/ForvisMazarsUK
- Instagram: www.instagram.com/forvismazarsuk
MHA
MHA provides audit and assurance services alongside ESG and sustainability advisory support. Its ESG Audit & Assurance team can provide independent assurance over selected aspects of an organisation’s sustainability information, including governance, risk, climate-related work, data, and disclosures.
This makes the company relevant where the requirement is focused on particular ESG reporting components rather than necessarily assuring an entire sustainability report from the outset. MHA has a Birmingham office on Newhall Street, providing a local point of contact for businesses across the Midlands.
Key Facts
- Core services: ESG audit and assurance, sustainability reporting support, ESG advisory
- Assurance areas: Governance, risk, climate-related information, ESG data, disclosures
- Approach: Independent assurance over selected aspects of ESG reporting
- Location: Newhall Street, Birmingham
- Suitable for: Organisations gradually introducing external assurance into their sustainability reporting process
Contact Information
- Website: www.mha.co.uk
- Phone: +44 (0)121 236 0465
- Email: [email protected]
- Address: Ground Floor, 35 Newhall Street, Birmingham, B3 3PU
- LinkedIn: www.linkedin.com/company/mha-uk
- Facebook: www.facebook.com/people/MHA-Accountants/100063452388108
- Instagram: www.instagram.com/mhaaccountants
Conclusion
Choosing between ESG assurance companies in Birmingham depends on the size of the business, its sector, the maturity of its reporting and internal processes, and the regulatory requirements it needs to address. Some companies combine ESG assurance with wider audit, sustainability, risk, and reporting services, while others concentrate on narrower areas such as carbon verification or selected sustainability disclosures. The right partner should provide credible independent assurance while identifying practical steps that can reduce reporting and control risks and strengthen long-term resilience. This guide is intended to provide neutral context for comparing different approaches rather than suggesting a single option for every organisation. The most suitable choice ultimately depends on the scope of assurance required and the type of expertise that fits the organisation’s existing ESG framework.