Onsite vs Offsite Biodiversity Net Gain (BNG) in Ireland
Biodiversity Net Gain (BNG) is becoming an essential component of sustainable development in Ireland. While not yet legally mandated, forward-thinking developers are incorporating BNG into projects to align with environmental best practices and improve planning approval prospects. One of the key debates in BNG implementation is whether to prioritize onsite or offsite solutions. Here, we explore the differences and benefits of both approaches.
Understanding Onsite vs Offsite BNG
BNG aims to leave biodiversity in a better state than before development. This can be achieved through either:
- Onsite BNG: Habitat creation and restoration within the development site itself.
- Offsite BNG: Investing in biodiversity restoration at a separate, designated location.
Each approach has distinct advantages, and a balanced strategy may be the most effective solution.
Key Considerations for Onsite BNG
Onsite BNG ensures that biodiversity gains occur where the impact has been made. It offers the following benefits:
- Direct integration into the development, providing green spaces for residents and workers.
- Immediate local impact, improving urban biodiversity and aesthetics.
- Potential planning advantages, as some local authorities may favor developments that enhance onsite ecology.
However, onsite BNG comes with challenges:
- Limited space and ecological viability: Smaller, fragmented green areas may not support diverse species or long-term ecological success.
- Ongoing management risks: Responsibility often falls on developers, residents, or property managers who may lack ecological expertise.
- Restrictions on habitat types: Certain high-value habitats, such as wetlands or dense woodlands, may not be feasible within a development.
Why Offsite BNG Offers Greater Ecological Value
Offsite BNG involves restoring or enhancing biodiversity in larger, ecologically suitable areas. This approach has significant advantages:
- Greater ecological impact: Large-scale restoration supports resilient, diverse habitats that are more sustainable over time.
- Expert-led conservation: Sites managed by experienced ecological teams ensure long-term biodiversity success.
- Regulatory and planning benefits: Investing in offsite BNG can help meet biodiversity requirements efficiently while contributing to national conservation efforts.
At Dunsany Estate, our offsite BNG projects focus on large-scale rewilding, rewetting, and woodland restoration, ensuring a measurable and lasting impact on Irish biodiversity.
Long-Term Success and Community Benefits
Onsite BNG benefits immediate occupants by integrating nature into the built environment. However, offsite BNG can provide broader community benefits:
- Public access to restored habitats, including walking trails, nature reserves, and educational programs.
- Stronger climate resilience, as larger, well-managed ecosystems support flood prevention and carbon sequestration.
- Opportunities for corporate sustainability engagement, allowing businesses to contribute to meaningful environmental projects.
Choosing the Right Approach
The best BNG strategy depends on project goals, ecological feasibility, and planning considerations. In many cases, a hybrid approach – combining onsite enhancements with offsite investment delivers the most effective results.
Dunsany Estate provides high-quality offsite BNG solutions, ensuring your biodiversity commitments are met with measurable, long-term benefits. Whether you’re a developer, corporate investor, or sustainability professional, we can help you navigate the complexities of BNG in Ireland.
Start your BNG journey today by contacting us to learn more about our offsite biodiversity restoration projects.
