BNG Biodiversity Net Gain Monitoring Survey Wandsworth, London: Battersea, Putney, Tooting
Wandsworth Council requires most new developments to deliver at least 10% biodiversity net gain, secured for 30 years under the Environment Act 2021. With significant regeneration in Battersea, Putney, and the Wandsworth riverside, BNG monitoring is now a standard part of the planning process in the borough.
Wandsworth BNG Requirements
| Requirement | Detail | | --- | --- | | Minimum BNG | 10% net gain using Defra's Statutory Biodiversity Metric 4.0 | | HMMP Required | Habitat Management and Monitoring Plan for all BNG applications | | Legal Agreement | Section 106 or conservation covenant — 30-year minimum | | Mandatory since | 12 February 2024 (major sites); 2 April 2024 (small sites) | | De minimis exemption | Impact on less than 25 m² habitat + less than 5 m linear habitat, no priority habitat |
Contact Wandsworth Planning: 020 8871 7620 or planninginformation@wandsworth.gov.uk
What's Included in a BNG Monitoring Survey (Wandsworth)
| Component | Description | | --- | --- | | Baseline habitat survey | UK Hab classification of existing habitats | | Biodiversity Metric 4.0 calculation | Pre-development biodiversity value | | Biodiversity Gain Plan | 30-year management plan for Wandsworth submission | | Protected species survey | Preliminary ecological appraisal | | HMMP drafting | Habitat Management and Monitoring Plan |
Wandsworth-Specific Context
| Factor | Impact on BNG | | --- | --- | | Battersea Power Station development | Large-scale BNG precedent — Glassmills achieved 39.24% net gain | | Putney riverside | Thames habitat corridor — specific ecological assessment | | Tooting Bec Common | SINC — proximity assessment required | | 46 conservation areas | Development in conservation areas requires additional assessment | | Battersea/Nine Elms regeneration | Significant habitat creation opportunities on large sites |
30-Year Monitoring Schedule (Wandsworth)
| Year | Activity | | --- | --- | | Pre-development | Baseline survey + Biodiversity Gain Plan + draft HMMP | | Year 1 | Initial monitoring report | | Year 3 | Monitoring report | | Year 5 | Monitoring report + metric update | | Year 10 | Full monitoring report | | Year 15 | Monitoring report | | Year 20 | Monitoring report + metric update | | Year 25 | Monitoring report | | Year 30 | Final compliance survey |
BNG Monitoring Survey Costs in Wandsworth (2025)
| Cost Component | Range (ex VAT) | | --- | --- | | BNG initial assessment | £5,000–£50,000+ (standard projects) | | BNG ecologist fees (Putney / Battersea area) | £1,500–£10,000+ | | Biodiversity Gain Plan | £800–£2,500 | | HMMP drafting | £495–£5,000+ | | Council monitoring fees | Varies — confirm with Wandsworth | | Off-site BNG units | From £19,000 per unit |
Fees increase approximately 5% annually with inflation (RPI-linked).
Areas in Wandsworth We Cover
Ice Labz provides BNG monitoring surveys across SW11, SW12, SW15, SW17, SW18, SW8.
Frequently Asked Questions
Q: When did BNG become mandatory in Wandsworth?
BNG became compulsory from 12 February 2024 (major sites) and 2 April 2024 (small sites) under the Environment Act 2021.
Q: Does my Wandsworth development need BNG monitoring?
If your development is above the de minimis threshold (less than 25 m² habitat impact, less than 5 m linear habitat, no priority habitat), BNG applies. Small housing developments (1–9 homes) also require BNG.
Q: Can BNG be delivered on-site in Wandsworth?
On-site BNG delivery depends on your site. Large sites in Battersea and the riverside have more opportunity for on-site habitat creation. Small urban sites may require off-site units or statutory credits.
Q: What BNG levels are achievable in Wandsworth?
Wandsworth's Glassmills development achieved 39.24% net gain — significantly above the 10% minimum. Work with your ecologist to identify achievable habitat creation options.
Q: Does Putney riverside development require specific ecological assessment?
The Thames is a habitat corridor of metropolitan importance. Development near the riverside may require specific ecological assessment and assessment of effects on the Blue Ribbon Network.
Q: What happens if I can't achieve 10% BNG on my Wandsworth site?
You can purchase off-site BNG units or use Natural England's statutory biodiversity credits as a last resort. Discuss options with your ecologist and Wandsworth planning officer.