Email: [email protected]

Telephone: 0800 494 7479

Ecological Clerk of Works (ECoW)

Ecological Clerk of Works (ECoW)

Active ecological oversight during construction, keeping your site compliant, protected and moving when ecology is a live planning risk. 

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Do You Need an Ecological Clerk of Works?

Whether your site is live or about to start, if ecological conditions, licences or method statements apply, an Ecological Clerk of Works can provide on-site ecological support throughout the construction process. 

Once construction begins, ecological risk becomes immediate. An ECoW exists to manage that risk in real time, so your programme does not stall due to avoidable legal or planning breaches. 

Where surveys and reports set the rules, an ECoW makes sure those rules are applied correctly on site. 

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Our Approach

Active On-site Risk Control

Immediate ecological decision-making during works.

Clear Compliance Oversight

Alignment with planning conditions, licences and RAMS.

Contractor-level clarity

Advice site teams can act on instantly.

Integrated close-out reporting

Clean handover into condition discharge and regulator review.

ECoW Support Structured Around Your Programme

Ecological Support

We review ecological controls before works begin so site teams know exactly what applies, when, and why. 

This typically includes: 

  • Reviewing CEMP / CEMP-ECO documents 
  • Reviewing method statements and RAMS 
  • Advising on timing constraints such as nesting birds or seasonal species windows 
  • Carrying out pre-commencement checks (for example nesting birds, badgers or reptiles) 
  • Briefing site managers on ecological constraints before mobilisation 

Outcome: fewer first-week stoppages and no reactive redesign. 

Ecological Oversight

Ecological oversight is available while work is happening, not after problems arise. During construction, the ECoW provides active, on-site ecological control. 

Support may include: 

  • Watching briefs during vegetation clearance 
  • Oversight of tree felling, demolition or groundworks 
  • Toolbox talks for contractors 
  • On-site advice when unexpected ecological issues arise 
  • Immediate intervention where there is a legal or licence risk 

Outcome: risks handled immediately, without escalation. 

Compliance and Reporting 

After works, the ECoW supports condition discharge and record keeping with evidence planners can rely on. 

This may involve: 

  • Preparing compliance or completion reports 
  • Confirming mitigation has been delivered correctly 
  • Liaising with planners, consultants and regulators 
  • Updating as-built mitigation information 

Outcome: smoother discharge of conditions and fewer late queries.

Discuss Construction-Phase Ecology

Why Appoint an ECoW?

Risk control. 

  • A single ecological breach can halt a site 
  • Enforcement action is costly and public 
  • Delays compound quickly once works stop 
  • Councils increasingly expect ECoW presence on medium to large schemes 

An ECoW prevents small issues from becoming legal problems. 

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Mini Builders suggestive of an ECoW overlooking the site

Case Insight

A mixed-use development required ecological supervision during vegetation clearance and early groundworks due to protected species mitigation conditions. During site preparation, previously unidentified nesting activity was discovered within retained boundary vegetation. Ecological Clerk of Works support allowed works to pause locally, mitigation to be adjusted, and unaffected areas to continue without programme-wide delay. Toolbox talks clarified updated working methods, and compliance evidence was recorded for condition discharge. The site progressed through construction without enforcement action, redesign, or additional planning intervention.
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Your Next Step

If your site is live — or about to start — ecological risk needs active control. 

 
We’ll confirm whether ECoW input is required and scope it proportionately from the outset. 

Phone: 0800 494 7479 
 Email: [email protected] 

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Areas We Cover

We cover many areas across England. Click below to find out more.

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Ecological Clerk of Works (ECoW) - FAQs

What is an Ecological Clerk of Works (ECoW)?

An Ecological Clerk of Works is a qualified ecologist appointed to oversee construction activities and ensure that all ecological requirements set out in planning conditions, mitigation strategies, and environmental reports are properly implemented on site.

ECoW support bridges the gap between planning approval and construction, ensuring compliance is delivered in practice, not just on paper.

An ECoW is typically required where ecological planning conditions have been attached to a development.

This commonly includes:

  • Protected species mitigation such as bats, great crested newts, or reptiles
  • Habitat protection measures
  • Vegetation clearance restrictions
  • Biodiversity Net Gain delivery requirements

Local Planning Authorities will often specify ECoW supervision within decision notices or ecological reports.

The role of an ECoW is to supervise works and ensure ecological protection measures are correctly followed during construction.

This typically includes:

  • Toolbox talks for site teams
  • Supervision of vegetation clearance
  • Watching briefs during sensitive works
  • Installation of ecological protection fencing
  • Ensuring compliance with method statements and licences

The ECoW acts as an independent safeguard to prevent ecological harm and planning breaches.

Ecological surveys such as PEAs or PRAs inform planning decisions.

An ECoW operates after planning approval, during the construction phase, to ensure those survey recommendations and mitigation measures are properly implemented.

In simple terms:

  • Surveys assess risk
  • ECoW ensures compliance

An ECoW is not a standalone legal requirement, but it becomes mandatory where it is specified within planning conditions, ecological reports, or protected species licences.

Failure to comply with these requirements can lead to:

  • Planning enforcement action
  • Delays to construction
  • Legal breaches relating to protected species

An ecological watching brief is a form of ECoW supervision where an ecologist is present during specific high risk construction activities.

This may include:

  • Site clearance
  • Excavation works
  • Demolition of structures with ecological potential

The purpose is to monitor works in real time and respond immediately if ecological issues arise.

In many cases, yes.

Even small developments may require ECoW supervision where:

  • There is potential for protected species
  • Vegetation clearance is conditioned
  • Ecological mitigation has been approved

The requirement is based on ecological risk, not just site size.

What happens if ECoW supervision is not followed?

Failure to implement ECoW supervision where required can result in serious consequences.

These may include:

  • Stop notices from the Local Planning Authority
  • Breach of planning conditions
  • Offences under wildlife legislation
  • Project delays and increased costs

Engaging an ECoW ensures compliance is managed proactively rather than reactively.

ECoW input is typically scheduled around key construction stages.

This may include:

  • Pre commencement toolbox talks
  • Supervised site clearance
  • Ongoing monitoring visits
  • Final compliance checks

The level of involvement depends on the ecological sensitivity of the site and planning requirements.

Yes. An ECoW will usually provide site records and compliance reporting to demonstrate that ecological requirements have been met.

This may include:

  • Supervision notes
  • Photographic evidence
  • Compliance summaries for planners
  • Input into condition discharge

These records are often required by Local Planning Authorities to confirm that works have been carried out correctly.

The developer or client typically appoints the ECoW, often following recommendations within ecological reports submitted at planning stage.

The ECoW must be suitably qualified and experienced to ensure credibility with planners and regulators.

Local Planning Authorities enforce ECoW requirements through planning conditions and compliance checks.

For example, guidance from authorities such as
https://www.planningportal.co.uk/
and individual council validation requirements will often specify ecological supervision where necessary.

Failure to meet these conditions can prevent discharge of planning conditions and delay project completion.

An ECoW should be a professional ecologist with:

  • Relevant academic qualifications in ecology or environmental science
  • Experience in construction site supervision
  • Knowledge of UK wildlife legislation
  • Protected species licences where required

This ensures decisions on site are both legally compliant and technically robust.

Yes, in many cases.

Where Biodiversity Net Gain measures are being implemented on site, an ECoW may:

  • Oversee habitat creation
  • Monitor installation of ecological features
  • Ensure compliance with approved biodiversity strategies

This supports successful delivery of ecological enhancements alongside development.

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