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Home| Services| Environment | Ecology & Biodiversity

Ecology & Biodiversity

Planning-Led Ecological Support for Projects of All Scales

Biodiversity Net Gain (BNG)
Ecological Clerk of Work (ECoW)
Habitat Management Plans
Licensing & Mitigation
Ecology & Biodiversity

Planning-Led Ecological Support for Projects of All Scales

At Arthian, our ecology consultants provide pragmatic, regulator-aligned support across the full development lifecycle – from early feasibility studies through planning applications to construction delivery, licensing and long-term habitat management.
 

We work with developers, planners, contractors and design teams across the UK and Ireland, helping projects navigate ecological constraints, satisfy planning conditions and deliver biodiversity outcomes with confidence.
 

Our experience spans residential, commercial and mixed-use development, infrastructure, utilities and energy projects, construction corridors for roads, rail and utilities, minerals, waste and industrial sites, and sensitive landscapes and designated habitats. Whether you’re scoping a new site, preparing an Environmental Impact Assessment (EIA), or managing construction-phase risks, we tailor our ecology services to your planning context, programme and regulatory obligations.

Ecology Services Aligned with Planning Workflows

We structure our ecology offering around the key stages of planning and development. We also support Habitat Regulations Assessment (HRA), Ecological Impact Assessment (EcIA) and Expert Witness input for complex or contested sites.

Pre-Planning Support & Assessments
Protected Species Surveys, Licensing & Mitigation
Biodiversity Net Gain (BNG)
Ecological Clerk of Works (ECoW)
Post-Planning Support
BREEAM Ecology Assessments
Specialist Support for Infrastructure Projects
Pre-Planning Support & Assessments

Pre-Planning Support & Assessments

Pre-Planning Support & Assessments are essential for identifying ecological constraints and opportunities early in the development process. These services typically include Preliminary Ecological Appraisals (PEA), Phase 1 habitat surveys, and constraints mapping, all of which help assess the ecological value of a site and its potential sensitivities.
 

The findings inform site feasibility, layout, and design, ensuring that biodiversity considerations are integrated from the outset. This proactive approach supports planning applications, reduces the risk of delays, and helps developers meet their legal and environmental obligations while promoting sustainable land use.

Protected Species Surveys, Licensing & Mitigation

Protected Species Surveys, Licensing & Mitigation

Protected Species Surveys, Licensing & Mitigation are essential for ensuring that development projects comply with wildlife legislation and safeguard biodiversity. Ecological surveys are carried out by qualified specialists to identify the presence of protected species such as bats, great crested newts, badgers, reptiles, birds, and others.
 

These surveys are subject to seasonal timing constraints, which are critical for accurate results and legal compliance. Where protected species are identified, appropriate mitigation strategies are developed to avoid, reduce, or compensate for impacts, and may include habitat enhancement, exclusion techniques, or translocation. Where necessary, licences are obtained from statutory bodies to permit works, ensuring that development can proceed responsibly and in line with conservation objectives.

Biodiversity Net Gain (BNG)

Biodiversity Net Gain (BNG)

Biodiversity Net Gain (BNG) ensures that development projects leave the natural environment in a measurably better state than before. In line with the Environment Act 2021, BNG assessments involve metric calculation to quantify habitat losses and gains, followed by the development of a BNG strategy that outlines how biodiversity improvements will be achieved.
 

This includes detailed habitat creation and enhancement plans, which may be delivered on-site or through off-site compensation. These strategies support planning applications, demonstrate compliance with legal requirements, and contribute to wider ecological resilience and landscape connectivity.

Ecological Clerk of Works (ECoW)

Ecological Clerk of Works (ECoW)

Ecological Clerk of Works (ECoW) services provide essential ecological oversight during the construction phase of development projects. Acting as an on-site specialist, the ECoW ensures that ecological commitments and mitigation measures are implemented correctly and in line with planning conditions and wildlife legislation.
 

This includes construction-phase ecological supervision, delivery of toolbox talks to raise awareness among site personnel, and active monitoring of works to safeguard habitats and protected species. The ECoW plays a key role in guiding the practical application of mitigation strategies, helping to avoid ecological harm and maintain compliance throughout the build.

Post-Planning Support

Post-Planning Support

Post-Planning Support ensures that ecological commitments made during the planning process are effectively delivered and monitored throughout the lifecycle of a development. This includes the preparation and implementation of Habitat Management & Monitoring Plans (HMMP), which set out long-term strategies for maintaining and enhancing biodiversity on site.
 

Ongoing ecological monitoring helps track habitat condition and species presence, ensuring compliance with planning conditions and conservation objectives. These activities support the discharge of planning conditions, providing clear evidence to regulators that ecological mitigation and enhancement measures are being upheld over time.

BREEAM Ecology Assessments

BREEAM Ecology Assessments

BREEAM Ecology Assessments support sustainable development by evaluating and enhancing the ecological value of sites in line with the Building Research Establishment Environmental Assessment Method (BREEAM).
Our specialists provide targeted input to help secure LE01–LE05 credits, including baseline ecological surveys, ecological value calculations, and the development of Landscape and Habitat Management Plans. These assessments ensure that biodiversity is protected and improved throughout the design, construction, and operational phases of a project. By aligning with BREEAM criteria, we help clients achieve higher sustainability ratings and demonstrate a clear commitment to environmental stewardship.

 

Specialist Support for Infrastructure Projects

Specialist Support for Infrastructure Projects

Specialist Support for Infrastructure Projects ensures that ecological and environmental considerations are fully integrated into large-scale developments from the outset.
 

Our services include route corridor surveys to identify ecological constraints early in the design process, alongside detailed constraints mapping to inform planning and minimise impacts. We provide expert input on protected species mitigation, ensuring legal compliance and biodiversity protection throughout the project lifecycle. During construction, our Ecological Clerk of Works (ECoW) delivers on-site supervision and toolbox talks to guide ecological best practice. Post-construction, we support habitat reinstatement to restore ecological value and meet long-term environmental commitments.

Pre-Planning Support & Assessments

Pre-Planning Support & Assessments

Pre-Planning Support & Assessments are essential for identifying ecological constraints and opportunities early in the development process. These services typically include Preliminary Ecological Appraisals (PEA), Phase 1 habitat surveys, and constraints mapping, all of which help assess the ecological value of a site and its potential sensitivities.
 

The findings inform site feasibility, layout, and design, ensuring that biodiversity considerations are integrated from the outset. This proactive approach supports planning applications, reduces the risk of delays, and helps developers meet their legal and environmental obligations while promoting sustainable land use.

Protected Species Surveys, Licensing & Mitigation

Protected Species Surveys, Licensing & Mitigation

Protected Species Surveys, Licensing & Mitigation are essential for ensuring that development projects comply with wildlife legislation and safeguard biodiversity. Ecological surveys are carried out by qualified specialists to identify the presence of protected species such as bats, great crested newts, badgers, reptiles, birds, and others.
 

These surveys are subject to seasonal timing constraints, which are critical for accurate results and legal compliance. Where protected species are identified, appropriate mitigation strategies are developed to avoid, reduce, or compensate for impacts, and may include habitat enhancement, exclusion techniques, or translocation. Where necessary, licences are obtained from statutory bodies to permit works, ensuring that development can proceed responsibly and in line with conservation objectives.

Biodiversity Net Gain (BNG)

Biodiversity Net Gain (BNG)

Biodiversity Net Gain (BNG) ensures that development projects leave the natural environment in a measurably better state than before. In line with the Environment Act 2021, BNG assessments involve metric calculation to quantify habitat losses and gains, followed by the development of a BNG strategy that outlines how biodiversity improvements will be achieved.
 

This includes detailed habitat creation and enhancement plans, which may be delivered on-site or through off-site compensation. These strategies support planning applications, demonstrate compliance with legal requirements, and contribute to wider ecological resilience and landscape connectivity.

Ecological Clerk of Works (ECoW)

Ecological Clerk of Works (ECoW)

Ecological Clerk of Works (ECoW) services provide essential ecological oversight during the construction phase of development projects. Acting as an on-site specialist, the ECoW ensures that ecological commitments and mitigation measures are implemented correctly and in line with planning conditions and wildlife legislation.
 

This includes construction-phase ecological supervision, delivery of toolbox talks to raise awareness among site personnel, and active monitoring of works to safeguard habitats and protected species. The ECoW plays a key role in guiding the practical application of mitigation strategies, helping to avoid ecological harm and maintain compliance throughout the build.

Post-Planning Support

Post-Planning Support

Post-Planning Support ensures that ecological commitments made during the planning process are effectively delivered and monitored throughout the lifecycle of a development. This includes the preparation and implementation of Habitat Management & Monitoring Plans (HMMP), which set out long-term strategies for maintaining and enhancing biodiversity on site.
 

Ongoing ecological monitoring helps track habitat condition and species presence, ensuring compliance with planning conditions and conservation objectives. These activities support the discharge of planning conditions, providing clear evidence to regulators that ecological mitigation and enhancement measures are being upheld over time.

BREEAM Ecology Assessments

BREEAM Ecology Assessments

BREEAM Ecology Assessments support sustainable development by evaluating and enhancing the ecological value of sites in line with the Building Research Establishment Environmental Assessment Method (BREEAM).
Our specialists provide targeted input to help secure LE01–LE05 credits, including baseline ecological surveys, ecological value calculations, and the development of Landscape and Habitat Management Plans. These assessments ensure that biodiversity is protected and improved throughout the design, construction, and operational phases of a project. By aligning with BREEAM criteria, we help clients achieve higher sustainability ratings and demonstrate a clear commitment to environmental stewardship.

 

Specialist Support for Infrastructure Projects

Specialist Support for Infrastructure Projects

Specialist Support for Infrastructure Projects ensures that ecological and environmental considerations are fully integrated into large-scale developments from the outset.
 

Our services include route corridor surveys to identify ecological constraints early in the design process, alongside detailed constraints mapping to inform planning and minimise impacts. We provide expert input on protected species mitigation, ensuring legal compliance and biodiversity protection throughout the project lifecycle. During construction, our Ecological Clerk of Works (ECoW) delivers on-site supervision and toolbox talks to guide ecological best practice. Post-construction, we support habitat reinstatement to restore ecological value and meet long-term environmental commitments.

Ecology Calendar

Ecological Solutions for Every Season

From Preliminary Ecological Appraisals to pine marten surveys, our ecological experts are here to help.
 

Understanding ecological seasonality is essential for planning, programming and delivering development projects efficiently. Many surveys, mitigation measures and licensing activities can only be carried out at specific times of year, and missing these windows can lead to delays, increased costs or planning risk. Arthian’s Ecology Calendar provides a clear, month‑by‑month overview of when protected species surveys, habitat works and mitigation activities can be undertaken, helping you plan ahead with confidence.
 

Why Seasonal Ecology Matters

Ecology is one of the most time‑sensitive elements of the planning and construction process. Species behaviour, breeding cycles and habitat use are governed by natural rhythms, and legislation requires that surveys and mitigation are carried out at ecologically valid times.
 

Our calendar highlights:

  • Optimal survey windows for bats, great crested newts, reptiles, badgers, otters, water voles, birds and other protected species
  • Seasonal constraints that may restrict vegetation clearance, tree works or ground disturbance
  • Mitigation and habitat creation periods that must align with breeding, hibernation or migration cycles
  • Licensing considerations that depend on survey evidence gathered at the right time of year

By understanding these windows early, you can sequence surveys, design work and construction activities to avoid unnecessary delays.
 

Arthian’s Ecology Calendar

The Ecology Calendar is designed to support planners, developers and contractors in building realistic programmes. It helps you identify critical survey periods well in advance, avoid seasonal bottlenecks that can impact planning submissions, align ecological mitigation with construction sequencing, understand where flexibility exists (and where it doesn’t), and reduce the risk of programme slippage due to missed survey windows.
 

Our ecologists can also provide project‑specific advice to integrate ecological requirements into your programme, risk register and construction methodology.

Ecology Calendar

Focused Ecology & Biodiversity Services

Below are our specialised Ecology & Biodiversity services. For more detailed support, visit our focused service pages.

Biodiversity Net Gain

Biodiversity Net Gain (BNG)

Planning-Ready BNG Support for Development & Infrastructure

Read more
Ecological Clerks of Work (ECoW)

Ecological Clerk of Work (ECoW)

On-Site Ecological Supervision for Planning Compliance & Risk Management

Read more
Habitat Management Plan

Habitat Management Plans

Ecological Delivery, Compliance & Monitoring After Consent

Read more
Licensing & Mitigation

Licensing & Mitigation

Expert Ecological Support for Planning, Compliance & Conservation

Read more
Biodiversity Net Gain (BNG)

Why Choose Arthian for Ecology & Biodiversity?

Our Understanding

Deep understanding of planning, infrastructure, and environmental interfaces.

Our Experience

National experience with regional insight and regulatory familiarity.

Integration

Fully integrated with geotechnical, hydrological, and ecological disciplines.

Results Driven

Commitment to technical rigour, clear communication, and long-term outcomes.

Our Latest Projects

View All Projects
Ecological Support for Network Rail Structures
Ecology

Ecological Support for Network Rail Structures

Read more
Ailsa Craig Ecological Clerk of Works
Ecology

Ailsa Craig Ecological Clerk of Works

Ecological Clerk of Works (ECoW) during granite extraction

Read more
Environmental Management for High Voltage Substation Development in Kintore
Development

Environmental Management for High Voltage Substation Development in Kintore

Environmental management for major multi-phase construction project to include Environmental/Ecological Clerk of Works (ECoW) role, Construction Environmental Management Plans (CEMPs) and geo-environmental investigation.

Read more

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We’d love to hear from you – whether you have a question, a project in mind, want to explore job opportunities, or just want to say hello.

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