Environmental Impact Assessments

Practical environmental assessments that keeps development moving

If your project is likely to have significant environmental effects, an Environmental Impact Assessment (EIA) is often unavoidable. The challenge is making sure it works for your scheme and not against it.

At Marrons, we help clients handle EIA‑development in a way that is proportionate, robust and commercially realistic. Our role is to reduce risk and help to achieve clear and timely planning decisions, while ensuring environmental issues are properly understood and addressed. We focus not only on identifying risks early, but also on highlighting opportunities to support high‑quality, resilient and truly sustainable development aligned with best practice.

What you can expect from us

Clients come to us because they want certainty and momentum. We help you:

Get confirmation on whether EIA is required and what it genuinely needs to cover, in liaison with the local authority
Avoid unnecessary cost and complexity by focusing the scope on what really matters
Build a strong planning strategy that stands up to scrutiny
Protect your programme through clear coordination and realistic timescales
Secure consent by delivering high-quality Environmental Statements that are well‑structured, accessible and defensible
Respond confidently to consultation, challenge and examination.

This is about keeping control of the process — and the outcome.

We ensure that all EIA work is aligned with UK EIA regulatory requirements and relevant policy frameworks, giving clients confidence that their Environmental Statements meet the appropriate legal tests.

Starting early

We advise on EIA screening and scoping at the very start of a project. Early involvement allows environmental considerations to inform site selection, layout and design in a constructive way, rather than becoming a problem later in the process.

Early engagement also helps to demonstrate how environmental factors and reasonable alternatives have shaped the development approach — a key part of producing a transparent and defensible EIA.

Keeping it proportionate

Not every topic needs the same level of assessment. We work with you and your technical teams to agree a scope that is proportionate, policy and regulatorily aligned, and evidence‑led. We help to avoid over‑assessment while maintaining credibility with decision‑makers.

The EIAs we coordinate are supported by proportionate assessment, robust analysis and transparent evaluation of impacts, including clear explanations of mitigation and management measures. This ensures our statements is high‑quality, defensible, and focused on what genuinely matters.

Building the right technical team

While we work closely with our clients’ appointed specialists, a core part of EIA coordination is helping to shape the right technical team. We draw on our established relationships with trusted experts and can source specialist input where required, supplemented by our own in‑house technical capabilities.

Joining the dots

EIA works best when it is fully integrated into the planning strategy. Our EIA services sit alongside Marrons’ planning, masterplanning, design, heritage, landscape, environmental and transport expertise, ensuring a consistent and joined‑up submission.

All EIAs at Marrons are led by our experienced planning team. – understand the wider planning system, can manage complex political and legal considerations, and are highly skilled at solving development challenges. This planning‑led approach is strengthened by our interdisciplinary expertise across heritage, socio‑economics, landscape, design, architecture and transport, enabling us to provide bespoke, coordinated and pragmatic advice.

Clear leadership and communication

We coordinate the full EIA process, managing inputs from technical specialists and translating complex material into clear, decision‑ready narratives. Environmental Statements prepared under our direction are easy to navigate and focused on the issues that matter most.

We manage and produce Environmental Statements that are presented in a transparent, accessible and digestible way, ensuring decision‑makers and stakeholders can clearly follow the assessment process.

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We provide support across the full EIA process

Screening and Scoping advice EIA coordination and programme management Preparation, production and review of Environmental Statements Coordination of technical assessments using both internal expertise and trusted external specialists (including ecology, landscape, heritage, noise, air quality, transport and socio‑economics) Assessment of any alternatives and site selection Development of mitigation and enhancement strategies Support through consultation, determination and examination Expert input to planning appeals and inquiries.

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Experience that makes a difference

We support the delivery of EIAs for all types of development across a wide range of sectors, including: Residential Large‑scale strategic development sites Mixed‑use Regeneration town centre and retail development Commercial, Logistics and Industrial Community, education and healthcare facilities Later living and care Energy and infrastructure Rural, agricultural and land‑based development.

Clients value Marrons because we bring:

Commercial awareness

Understanding delivery pressures, viability and risk

Planning‑led thinking

Embedding EIA with a clear route to consent

High‑quality outputs

Supported by robust assessment and clear reasoning

Strategic and pragmatic advice

Advice that helps clients understand the planning and environmental implications of their proposals

A multidisciplinary team

Strong in‑house EIA expertise and technical competence, with well‑established relationships with leading external specialists

Credible environmental coordination

Working with trusted technical specialists

Strong process leadership

Keeping complex projects under control

A clear focus on outcomes

Decisions made, permissions secured, programmes protected

Supporting responsible development

EIA is not just about compliance. Done well, it supports better decision‑making and more resilient and sustainable development.

We help clients demonstrate environmental responsibility while delivering schemes that are viable, regulatory and policy compliant, and ready to progress. Our approach ensures EIAs not only minimise risks but also unlock opportunities to enhance scheme quality, sustainability and reputation.

Talk to us

If you are progressing a project that may require an EIA or want early advice on environmental risk, scope and strategy, our team is ready to support you.