With the Environment Act now enforcing mandatory Biodiversity Net Gain (BNG) across England, developers are operating in a fundamentally new planning landscape. Most developments are now required to deliver at least a 10% measurable improvement in biodiversity compared to the site’s baseline condition. This requirement is assessed using DEFRA’s statutory biodiversity metric, making ecological input a critical part of project planning rather than an afterthought.
In practice, this means biodiversity must be considered from the earliest stages of a project. One of the most effective steps developers can take is commissioning an early baseline habitat survey. This allows ecologists to map habitats, assess their condition, and calculate existing biodiversity units before design work begins.
Early ecological engagement helps identify constraints and opportunities before they become costly issues. Projects that delay ecological input often face redesigns, planning delays, or the need for more expensive off-site mitigation measures later in the process.
Developers typically have three routes to achieve BNG: on-site habitat creation or enhancement, off-site compensation, or purchasing statutory biodiversity credits. On-site solutions are often the most cost-effective where feasible and can also support stronger planning outcomes.
Well-designed landscaping, such as species-rich grassland, native tree planting, ponds, and green roofs, can significantly increase biodiversity value while enhancing the overall appeal and functionality of a site.
Ultimately, BNG is not just a compliance requirement. It presents an opportunity to create more sustainable, resilient, and attractive developments that deliver long-term environmental and commercial value.
