Environmental sustainability is no longer a trend. it’s a business imperative. In a city as dynamic as London, organisations are under constant pressure to comply with environmental regulations, reduce their carbon footprint, and demonstrate corporate responsibility. This growing need has led to a surge in demand for environmental consulting companies that offer expert guidance and practical solutions.
Whether it’s securing planning permission, conducting environmental impact assessments (EIA), or implementing sustainable strategies, environmental consultants play a crucial role. This guide outlines the top 10 environmental consulting companies in London, backed by verified reviews, services offered, and industry reputation helping you choose the right partner for your environmental goals.
What Do Environmental Consulting Companies in London Actually Do?
Environmental consulting companies are specialists who help businesses and government entities identify, manage, and reduce their environmental impact. In London, these consultancies provide services such as:
- Environmental Impact Assessments (EIA)
- Site assessments for contaminated land
- Air, water, and noise pollution analysis
- Carbon reporting and decarbonisation strategies
- Environmental health and safety (EHS) compliance
- Waste and resource management
- Biodiversity and ecological assessments
- ESG and sustainability reporting
By providing scientific, legal, and strategic expertise, these firms ensure that projects meet not only regulatory obligations but also broader sustainability objectives. They bridge the gap between environmental policy and on-the-ground implementation, making them essential partners in infrastructure, construction, urban planning, and corporate sustainability efforts.
Why Should Businesses in London Hire an Environmental Consultancy?
For businesses operating in the UK capital, environmental compliance is both a legal requirement and a reputational necessity. London’s planning permissions often depend on thorough environmental assessments, especially in sectors like construction, real estate development, manufacturing, and logistics.
Hiring an environmental consultancy ensures adherence to complex laws such as the Environmental Protection Act 1990, while also helping companies meet sustainability frameworks like BREEAM or ISO 14001.
Beyond compliance, consultancies support long-term environmental performance by identifying risks, improving operational efficiency, and supporting ESG (Environmental, Social, Governance) objectives.
Choosing the right consultancy can also lead to cost savings, reduced liability, and enhanced stakeholder trust.
Which Are the Top 10 Environmental Consulting Companies in London?
1. Trium Environmental – “Practical Solutions for Complex Environmental Challenges”
Trium Environmental is a boutique consultancy specialising in contaminated land and environmental due diligence across London and the Southeast. Their expertise helps clients navigate planning requirements and regulatory frameworks with confidence. Trium works closely with developers, commercial property owners, and legal teams.
The firm is well-regarded for providing clear, concise, and commercially aware reporting. Their consultants are highly responsive and maintain strong relationships with local authorities. Trium’s practical approach ensures that environmental risks are managed effectively at all stages of a project. Their services are particularly valuable during acquisitions and planning submissions.
Core Expertise
Experts in brownfield redevelopment and contaminated land assessments.
Ideal Clients
Developers and commercial property professionals.
- Website: https://www.triumenvironmental.co.uk/
- Phone: +44 (0)20 3887 7118
- Address: The Whitehouse, Belvedere Road, London SE1 8GA
- Email: hello@triumenv.co.uk
Review:
★★★★★ “Fast, reliable and a pleasure to work with. Trium helped us meet environmental conditions on time.”
2. RSK Group – “Global Expertise with Local Environmental Insight”
RSK Group is a global leader in environmental consultancy with an extensive presence across London. The firm provides comprehensive services from environmental impact assessments and site investigations to sustainability and ecological consulting. Their multidisciplinary team allows for seamless project delivery, even on highly complex developments.
RSK supports infrastructure, energy, and commercial sectors with cutting-edge tools and scientific insight. The company is known for integrating environmental best practices into every phase of development. Their strong regulatory understanding ensures full compliance with UK laws. RSK is widely respected for its technical rigour and large-scale project capabilities.
Service Strength
Specialists in large-scale infrastructure and regulatory compliance.
Suitable For
Major construction and government-backed projects.
- Website: https://rskgroup.com/
- Address: Spring Lodge, 172 Chester Road, Helsby, Cheshire, WA6 0AR, UK
- Email: communications@rsk.co.uk
Review:
★★★★★ “RSK’s attention to detail and wide-ranging expertise were invaluable on our project.”
3. Sweco UK – “Sustainable Engineering for a Better Future”
Sweco UK combines engineering expertise with environmental consultancy to deliver sustainable outcomes. Their London-based environmental team handles everything from EIA to water and resource efficiency strategies. Sweco’s focus on smart urban planning and climate adaptation sets them apart.
The firm is deeply involved in public infrastructure and city-scale environmental projects. Their strong collaboration with local authorities ensures smoother project approvals. Sweco’s data-led approach helps clients make informed decisions on risk and impact. They also offer strong capabilities in the energy and water sectors.
Key Capability
Bridging environmental consultancy with engineering insight.
Best Match
Public sector, infrastructure, and utility planning.
- Website: https://www.sweco.co.uk/
- Phone: +44 113 262 0000
- Address: Grove House, Mansion Gate DriveLeedsLS7 4DN
- Email: info@sweco.co.uk
Review:
★★★★☆ “Detailed reports and smart engineering thinking—Sweco was a great partner.”
4. Arup – “Designing Sustainable Environments at Global Scale”
Arup is one of the most prestigious environmental and engineering consultancies globally, with a strong footprint in London. Their environmental consultants work on high-profile projects integrating climate resilience, EIA, and sustainability metrics. Arup supports planning permissions with cutting-edge research and modelling tools.
Their multidisciplinary teams include engineers, planners, ecologists, and data scientists. The firm helps clients meet ESG targets through innovation and foresight. Their advisory work often shapes major developments in London’s built environment. Arup’s services are highly trusted by both public authorities and private investors.
Special Focus
Pioneers in sustainable design and climate adaptation strategy.
Recommended For
Large-scale developments and flagship urban projects.
- Website: https://www.arup.com/
- Phone: 020 7636 1531
- Address: 8 Fitzroy St, London W1T 4BJ
- Email: Contact form
Review:
★★★★★ “Brilliant collaboration, sustainability was embedded into every aspect of our project.”
5. UEEC – “Clear Advice for Environmental Compliance”
UEEC is a London-based consultancy with a practical focus on environmental compliance and assessments. Their team works closely with clients to deliver cost-effective solutions across permitting, audits, and EIA reporting. UEEC is known for making technical information understandable and action-oriented.
They offer strong support to SMEs and private developers navigating complex regulations. The firm’s documentation is consistently praised for its clarity and regulatory relevance. They’ve built a reputation for reliability and technical integrity. UEEC is a top choice for clients looking for no-fuss environmental consultancy.
Primary Strength
Straightforward environmental compliance and audit reporting.
Best Suited To
SMEs and independent developers.
- Website: https://www.ueec.co.uk/
- Phone: 01273 686 766
- Address: Donkey Row Barn, Brighton Road Newtimber, Hassocks BN6 9BS
- Email: hello@ueec.co.uk
Review:
★★★★☆ “Helpful and very clear UEEC guided us through the whole process smoothly.”
6. Ramboll (Including Temple Acquisition) – “Integrated Environment and Health Expertise”
Following its acquisition of Temple, Ramboll has become one of the most comprehensive environmental consultancies in London. The firm delivers integrated environmental, health, and sustainability consulting across major projects. Their services include EIA, strategic planning, health impact assessments, and stakeholder engagement.
Ramboll brings a global perspective with deep local regulatory knowledge. Their consultants are skilled in addressing urban environmental challenges through evidence-based analysis. The firm’s projects often combine transport, housing, and green infrastructure. Ramboll is particularly adept at managing complex, multi-stakeholder environments.
Strategic Advantage
Combines environment, health, and planning services seamlessly.
Ideal For
Urban regeneration and transport-led developments.
- Website: https://www.ramboll.com
- Phone: 020 7631 5291
- Address: 240 Blackfriars Rd, London SE1 8NW
- Email: london@ramboll.co.uk
Review:
★★★★★ “Excellent technical reports and strong local knowledge. Helped our team secure consent efficiently.”
7. Stantec – “Environmental Insight Backed by Engineering Excellence”
Stantec provides environmental consultancy services supported by a large engineering division. Based in London, they specialise in site assessments, environmental permitting, and sustainability planning. Stantec’s teams offer tailored advice to ensure clients meet environmental obligations during project planning and construction.
The firm places a strong focus on health and safety, environmental impact, and community engagement. Their reports are often cited for their clarity and regulatory compliance. Stantec has worked on high-impact infrastructure projects in the UK and abroad. Their integrated services are a good fit for technically complex developments.
Core Offering
Technical environmental services tied closely to engineering solutions.
Best Application
Complex infrastructure and engineering-led builds.
- Website: https://www.stantec.com/
- Phone: 020 3824 6600
- Address: 1st Floor, The Stills, 80 Turnmill St, London EC1M 5QU
- Email: media@stantec.com
Review:
★★★★☆ “Very detailed and always available for clarification—excellent consultancy.”
8. Thomson Environmental Consultants – “Trusted Experts in Environmental Due Diligence”
Thomson Environmental Consultants has over 15 years of experience delivering environmental services across the UK. In London, their focus includes Phase 1 and Phase 2 site assessments, ecology surveys, and due diligence reporting. Thomson works with a variety of clients from legal firms to developers, providing accurate and timely advice.
Their reports are always aligned with the latest regulatory requirements and planning standards. They also offer support during land acquisition processes. The company’s ecology services are particularly well-reviewed. Thomson maintains a reliable team of specialists in all key environmental areas.
Key Strength
Extensive expertise in ecological and land assessments.
Best Fit
Commercial landowners and legal advisors.
- Website: https://www.thomsonec.com/
- Phone: 01483 466 000
- Address: Compass House, Surrey Research Park, Guildford, Surrey, GU2 7AG.
- Email: enquiries@thomsonec.com
Review:
★★★★★ “Impressive technical reports and quick turnaround times perfect for our transaction.”
9. STM Environmental – “Focused Environmental Consultancy with Local Expertise”
STM Environmental is a niche consultancy offering environmental assessments, site investigation, and planning support throughout London. Their team has hands-on experience with land contamination, flood risk, and planning-related environmental studies. The firm works closely with architects, planning consultants, and developers to integrate environmental compliance into early design stages.
STM Environmental is also known for developing useful environmental software and tools. They offer a highly personal service with quick response times. The company’s pricing is competitive, making them attractive to smaller developers.
Area of Expertise
Contaminated land reports and flood risk analysis.
Best Choice For
Local planning applications and residential developments.
- Website: https://www.stmenvironmental.co.uk/
- Phone: +44 (0)203 4344940
- Address: STM Environmental Consultants, Unit 6 Crane Mews, 32 Gould Road, Twickenham, TW2 6RS
- Email: hello@eunomia.co.uk
Review:
★★★★☆ “Quick to respond and report delivery was excellent great value for money.”
10. Eunomia – “Evidence-Led Environmental Policy and Strategy”
Eunomia is a highly respected consultancy focused on environmental economics, strategy, and policy advisory. Based in London, they support governments, councils, and NGOs on large-scale policy, waste management, and sustainability initiatives. Eunomia’s projects often influence environmental law and resource efficiency planning.
They specialise in the circular economy, carbon analysis, and sustainable procurement. The firm is best suited for strategic and high-level advisory work rather than site-based compliance. Their team includes economists, policy analysts, and environmental scientists. Eunomia is often cited in academic and government reports.
Distinct Capability
Policy-focused environmental and sustainability consultancy.
Best Aligned With
Government bodies, NGOs, and research-led projects.
- Website: https://eunomia.eco/
- Phone: +44 (0)203 4344940
- Address: 3rd Floor, 87 Bartholomew Close,London, EC1A 7EB
- Email: hello@eunomia.co.uk
Review:
★★★★★ “Eunomia’s insights helped shape our sustainability strategy truly top-tier advisors.”
What Makes These Environmental Consulting Companies Stand Out?
Each of these firms has earned a place in this list through their commitment to excellence and innovation.
RSK Group stands out for its comprehensive contaminated land solutions and large-scale EIA capabilities. Temple Group is known for its expertise in planning permissions and transport-related assessments. Waterman Group offers integrated engineering and sustainability support for complex infrastructure projects.
Firms like WSP and Arup lead in digital innovation, using smart technologies for environmental monitoring and sustainable urban design. Meanwhile, consultancies such as LUC and SLR Consulting are recognised for their deep understanding of ecological and biodiversity issues, particularly relevant in urban development projects.
Ramboll and Bureau Veritas bring international standards and multidisciplinary services, making them ideal for companies operating across multiple jurisdictions.
How Can You Choose the Right Environmental Consultant for Your Project?
Selecting the right consultancy involves evaluating both technical and practical factors. Experience in your specific industry or project type is key. For instance, a firm with strong expertise in transport infrastructure may not be the best choice for heritage conservation or biodiversity assessments.
Check for relevant certifications like ISO 14001 and whether the company or its consultants are members of recognised bodies like the Institute of Environmental Management and Assessment (IEMA).
Review case studies, client testimonials, and published reports. Also consider location and responsiveness firms based in London are more familiar with local planning authorities and environmental constraints.
It’s also important to clarify billing models (hourly, per project, or retainer) and request a clear scope of work before committing.
What Are the Costs of Hiring Environmental Consulting Companies in London?
The cost of environmental consultancy varies depending on the service scope and project complexity. Here’s a general overview:
| Service Type | Average Cost (GBP) | Billing Model |
| Environmental Impact Assessment | £3,000 – £10,000+ | Per project |
| Site Assessments (Phase 1 & 2) | £1,500 – £7,000 | Per project |
| Ongoing Compliance Audits | £100 – £250/hour | Hourly or Retainer |
| ESG Strategy and Carbon Reporting | £5,000 – £20,000+ | Monthly/Project-based |
Firms often offer customised quotes, so it’s recommended to request a detailed proposal based on your unique needs. Some also provide a free consultation or site visit to assess the scope.
Are There Any UK Regulations You Should Know Before Hiring a Consultant?
Before engaging with a consultancy, understanding the regulatory environment is essential. London-based projects are often subject to several regulations including:
- Environmental Protection Act 1990
- Town and Country Planning (Environmental Impact Assessment) Regulations 2017
- Climate Change Act 2008
- The Environment Act 2021
- Net Zero by 2050 policy goals
These laws influence construction permits, waste management, air quality monitoring, and even business operations. A reputable consultancy should be well-versed in all applicable legislation and ensure that your project remains compliant from start to finish.
What Are the Latest Trends Among Environmental Consulting Firms in London?
The environmental consultancy sector is adapting to new challenges and technologies. Increasingly, firms are incorporating artificial intelligence, drone mapping, and real-time sensor networks to monitor environmental conditions.
Carbon and ESG reporting have become vital services, as organisations aim to meet investor expectations and regulatory disclosures. Climate resilience and risk modelling are now standard in infrastructure planning, particularly for projects funded through sustainable finance or green bonds.
Additionally, biodiversity net gain strategies and natural capital accounting are gaining traction as part of broader ecological and social sustainability agendas.
Conclusion
Environmental consultancy is an indispensable service in today’s regulatory and sustainability-driven climate. From site assessments to strategic carbon planning, the right partner can help you mitigate risks, remain compliant, and achieve long-term environmental goals.
This guide has explored the top environmental consulting companies in London, offering a detailed look at their services, strengths, and value. With this information at your fingertips, you’re now fully equipped to choose the consultancy that aligns best with your project and sustainability ambitions.
FAQs About Environmental Consulting Companies in London
How do I verify if an environmental consultancy is certified in the UK?
Look for certifications like ISO 14001 and memberships with the Institute of Environmental Management and Assessment (IEMA), often listed on the firm’s website or company profile.
Can environmental consultants assist with planning applications?
Yes, many environmental consultants provide the necessary reports and assessments required for planning submissions, particularly Environmental Impact Assessments.
Are there specific environmental laws applicable to London-based projects?
Yes, projects in London must comply with UK-wide regulations as well as local planning authority requirements, which may include air quality standards and biodiversity policies.
Do consultancies support ESG reporting and carbon footprint reduction?
Most modern firms offer ESG and carbon advisory services, helping businesses align with sustainability goals and improve investor confidence.
What are typical turnaround times for environmental reports?
Depending on the complexity, reports like Phase 1 Site Assessments may take 1–2 weeks, while full EIAs can require 2–6 months including consultation periods.
Are consultancy fees fixed or negotiable?
Fees can vary and are often based on project scope, urgency, and location. Many firms are open to discussing customised packages or payment schedules.
Can consultants help avoid fines or legal action?
Yes, by ensuring compliance and identifying environmental risks early, consultants can help businesses avoid penalties and maintain regulatory standing.