What's the cost?
BNG is one of the most significant changes in wildlife law in the last 30 years and will create a new market in biodiversity ‘units’. Measuring and securing BNG requires expert ecological knowledge firstly to measure the value on site but then to work out how the required 10% gains can be achieved and delivered.
Successful BNG delivery often requires detailed negotiation with the planning authority or other third parties. Delivery of BNG can be very costly. A small residential development of 70 units may require the delivery of 10 biodiversity units to compensate for the loss and with an estimated cost of at least £11,000 per unit it pays to plan ahead and work out at the beginning of each project how and where BNG will be delivered. BNG has been trialled at a number of local authorities over the last five years and whilst a ten per cent net gain has been settled on the cost of BNG units varies wildly, some up to £45,000.