Before planning is approved or construction begins, ecological and environmental constraints often shape what can and cannot be built.

Ecology and environmental consultants play a key role in assessing habitats, protected species, biodiversity impact and environmental risk. For developers, contractors and landowners, this stage is often critical to securing planning permission and progressing a site.

This guide highlights some of the leading ecology and environmental consultancies operating across the UK, combining nationally recognised firms with specialist and active consultants working on real projects.

In many cases, ecological surveys are followed closely by ground investigation and geotechnical work, making this one of the first critical stages in the development process.

What do ecology and environmental consultants do?

Ecology and environmental consultants are typically involved at the earliest stage of a project, often before planning is submitted or during the planning process.

Their role is to assess environmental constraints and ensure developments comply with regulations and policy requirements.

Typical services include:

• Preliminary ecological appraisals (PEA)
• Protected species surveys (bats, newts, reptiles, birds)
• Biodiversity Net Gain (BNG) assessments
• Habitat surveys and ecological impact assessments
• Environmental impact assessments (EIA)
• Mitigation strategies and licensing support

This work directly affects whether a site can be developed, how it is designed and what mitigation is required.

How we selected these consultants

This is not a simple directory or paid listing.

Instead, this shortlist has been shaped using a practical mix of:

• well-known UK ecology and environmental consultancies
• specialist firms supporting planning and development
• consultants active on real projects
• businesses operating within the wider early works and planning ecosystem

This creates a more useful reference point for developers and project teams looking to understand who is actively operating in this space, not just who appears in generic directories.

This approach reflects how projects actually move through planning and early works, rather than simply listing the largest firms by turnover or directory presence.

Top UK Ecology & Environmental Consultants

Some of the most active UK ecology and environmental consultants include:

• RSK Group
• Ecologia Environmental Solutions
• Thomson Environmental Consultants
• Aspect Ecology
• FPCR Environment and Design
• Temple Group

1. RSK Group

RSK is one of the UK’s largest environmental and engineering consultancies, delivering ecology, environmental and planning services across major infrastructure and development projects.
Visit website

2. Ecologia Environmental Solutions

Ecologia supports planning and development through ecological surveys, environmental assessments and compliance work, with a strong focus on early-stage project delivery.
Visit website

3. Thomson Environmental Consultants

Thomson is a well-established UK consultancy specialising in ecology, arboriculture and environmental planning, supporting projects across residential, commercial and infrastructure sectors.
Visit website

4. Aspect Ecology

Aspect Ecology provides ecological consultancy services focused on planning and development, particularly within residential and commercial projects.
Visit website

5. FPCR Environment and Design

FPCR delivers integrated environmental, ecology and design consultancy services, supporting a wide range of development and infrastructure schemes.
Visit website

6. Ramboll

Ramboll is an established environmental consultancy providing ecology, planning and sustainability services across infrastructure and development projects.
Visit website

7. Ecology Solutions

Ecology Solutions delivers ecological surveys and planning support for developers, helping projects progress through environmental and biodiversity requirements.

8. Greenwillows Associates

Greenwillows provides ecological consultancy services across development and infrastructure projects throughout the UK, supporting planning and environmental compliance.

9. Middlemarch Environmental

Middlemarch specialises in ecological survey work and biodiversity assessments, supporting a wide range of planning applications across the UK.

10. Arbtech

Arbtech is a well-known UK consultancy providing ecology and arboricultural services, particularly for planning-led development and residential projects.

Why ecology matters at the start of a project

Ecological constraints can delay or completely reshape a development.

Protected species, habitat restrictions and biodiversity requirements can lead to:

• planning delays
• design changes
• seasonal survey requirements
• additional mitigation costs

Understanding these constraints early allows projects to move forward with fewer surprises.

What happens after ecology surveys are complete?

Once ecological assessments are complete and planning progresses, projects typically move into ground investigation, early works and site setup. This often includes:

• ground investigation and geotechnical surveys
• groundworks and foundation preparation
• site access and temporary trackway
• temporary buildings and site infrastructure
• welfare and sanitation provision for operatives

There is often a short window between planning clearance and site mobilisation, making early coordination essential.

Once planning constraints are resolved, projects often move quickly into mobilisation. Ensuring site access, temporary infrastructure and welfare provision are in place early can help avoid delays and keep projects on programme.

Related guides

• Top Geotechnical & Ground Investigation Contractors
• Top Civil Engineering Companies in the UK
• Top Temporary Trackway Suppliers
• Top Temporary Building Suppliers

FAQ

What is an ecological survey?

An ecological survey assesses habitats, species and environmental constraints to determine how a site can be developed.

When is an ecology survey required?

Typically before or during the planning process, especially where protected species or habitats may be present.

What is Biodiversity Net Gain (BNG)?

BNG is a planning requirement in England that ensures development leaves biodiversity in a better state than before.

How long do ecology surveys take?

Timelines vary depending on the type of survey, but some species surveys are seasonal and can delay projects if not planned early.

Final thoughts

Ecology and environmental consultancy is often the first step in understanding whether a site can be developed at all.

For developers and project teams, identifying the right consultants early can help avoid delays, reduce risk and move projects forward with greater certainty.