Biodiversity Net Gain: A Practical Guide for Dorset Developers

Since Biodiversity Net Gain became mandatory under the Environment Act, virtually every planning consent in England carries a condition most developers didn't have to think about five years ago: leave the site's biodiversity measurably better than you found it, by at least 10%, and keep it that way for 30 years.

On paper it's a metric. On the ground, it's habitat that has to be physically created, established and managed for three decades. That's where most schemes hit trouble.

The three ways to deliver BNG

• On-site: create or enhance habitat within the red line, new woodland, species-rich grassland, hedgerows, ponds. Usually the cheapest route if space allows.
• Off-site: buy or create habitat units on other land, either your own or through a habitat bank.
• Statutory credits: the expensive last resort, priced deliberately high to push developers towards real habitat.

Where schemes go wrong

The metric calculation is the easy part, your ecologist handles it. The failures we see are practical: planting that dies because nobody watered it through the first summer; grassland cut at the wrong time so it never establishes; management plans written and never actioned, discovered at the first monitoring visit. The 30-year Habitat Management and Monitoring Plan (HMMP) is a legal commitment, and local authorities in Dorset are now checking.

What a delivery contractor actually does

Heartwood delivers the physical side of BNG across Dorset: ground preparation and planting to the ecologist's specification, establishment care in the critical first three years, then cyclical management, cutting, scrub control, hedge management, against the HMMP, with records your consultant can drop straight into the monitoring report. One contractor, accountable for the habitat actually existing when the council looks.

Get BNG priced early

The most expensive BNG mistake is treating it as a paperwork line item and pricing the works after consent. Bring a delivery price into your viability appraisal early; it's free to ask. See our ecological land management service, or call 01929 480 995 to talk through a scheme.