BNG Monitoring Reports Timeline: When to Submit and What to Include
Biodiversity Net Gain requires a minimum 30-year monitoring programme with formal reports submitted to the Local Planning Authority at defined intervals. Understanding the monitoring schedule and what each report must contain helps you plan and budget for the full BNG obligation.
BNG Monitoring Key Facts
| Aspect | Requirement | | --- | --- | | Monitoring duration | 30 years minimum after development completion | | Legal basis | Environment Act 2021 | | Minimum gain | 10% biodiversity increase using Statutory Biodiversity Metric | | Mandatory since | 12 February 2024 (major); 2 April 2024 (small sites) |
Monitoring Report Schedule
The monitoring report years vary slightly by Local Planning Authority, but the typical minimum schedule is:
| Monitoring Year | When Reports Are Required | Activity | | --- | --- | --- | | Year 1 | Within 6 months of habitat creation | Initial as-built survey of habitat creation | | Year 2 | Annual report | Full habitat condition assessment | | Year 5 | Every 5 years | Full monitoring report + metric update | | Year 10 | Every 5 years | Full monitoring report | | Year 15 | Some LPAs require | Full monitoring report | | Year 20 | Every 5 years | Full monitoring report + metric update | | Year 25 | Some LPAs require | Full monitoring report | | Year 30 | Final report | Final compliance survey |
Most common minimum schedules:
- Years 1, 2, 5, 10, 15, 30 — or —
- Years 2, 5, 10, 15, 20, 25, 30
Confirm your specific schedule with your LPA, as some authorities require annual reporting in early years.
Natural England Monitoring Report Templates
Natural England provides official templates for all monitoring reports:
| Template | Purpose | Format | | --- | --- | --- | | Monitoring Report Template (MRT) | Structure progress report updates on HMMP delivery | Word document | | Monitoring Report Quantitative Summary | Record key quantitative data concisely | Excel spreadsheet |
Download from: publications.naturalengland.org.uk
When to Submit Reports
| Report | Submission Timing | | --- | --- | | Draft HMMP | With planning application | | Final HMMP | With Biodiversity Gain Plan (before development starts) | | First monitoring report | Within 6 months of habitat creation | | Ongoing reports | Typically by 1st November each monitoring year (confirm with your LPA) | | Final report | Year 30 — securing the full 30-year period |
Submit to: Local Planning Authority, register operator (off-site), and/or responsible body (conservation covenants).
What Each Monitoring Report Must Include
| Report Component | Description | | --- | --- | | Habitat condition assessment | Current condition vs. HMMP targets | | Management activities completed | What was done since the last report | | Compliance statement | Whether targets are being met | | Quantitative data | Updated Statutory Biodiversity Metric calculation | | Photographic evidence | Site photographs from the monitoring visit | | Adaptive management | Recommendations if habitats are underperforming | | Next steps | Management activities planned for the coming year |
Monitoring Report Template (MRT) Structure
The Word MRT document captures:
- Development details and monitoring objectives
- Habitat management activities completed
- Monitoring results (habitat condition, species records)
- Comparison with HMMP targets
- Photographs and evidence
- Recommendations and next steps
The Excel Quantitative Summary captures:
- Habitat areas by type
- Condition scores
- Biodiversity unit calculations
- Comparison with baseline
Submission Process
| Step | Who Does It | When | | --- | --- | --- | | Commission monitoring visit | Landowner / developer | Per agreed schedule | | Ecologist completes MRT | Qualified ecologist | Within 4 weeks of site visit | | Submit to LPA | Ecologist or landowner | By submission deadline | | LPA review | Local Planning Authority | Typically 4 weeks | | Confirmation | LPA confirms satisfactory compliance | Letter or email |
Year-by-Year Monitoring Activities
| Year | Activity | | --- | --- | | 0 | Baseline survey + Biodiversity Gain Plan + HMMP approved | | 1 | Initial monitoring visit — confirm habitat creation as-built | | 2 | First formal MRT submission | | 3–4 | Monitoring visits (desk-based between reports) | | 5 | Full MRT + metric update | | 6–9 | Desk-based updates | | 10 | Full MRT | | 11–14 | Desk-based updates | | 15 | Full MRT (if required) | | 16–19 | Desk-based updates | | 20 | Full MRT + metric update | | 21–29 | Desk-based updates | | 30 | Final MRT + compliance statement |
2025 BNG Monitoring Costs
| Cost Component | Cost (ex VAT) | | --- | --- | | Monitoring visit (ecologist) | £570–£2,280 per visit | | MRT completion | £200–£500 per report | | Report submission | Included | | LPA monitoring fee | Varies by council — confirm with your LPA |
Frequently Asked Questions
Q: Does the same ecologist need to do all monitoring reports?
No — but continuity helps. The Natural England MRT templates ensure that any competent ecologist can complete the monitoring report using the same methodology.
Q: What if the LPA doesn't respond to my monitoring report?
Keep records of all submissions. If the LPA doesn't respond within their review period, continue with the monitoring programme. Contact them if no response is received within 8 weeks.
Q: What happens if a habitat fails to meet condition targets?
The monitoring report must include an adaptive management plan. Additional management activities should be implemented, with the next monitoring visit brought forward if necessary.
Q: Can monitoring frequency be reduced if habitats are performing well?
Some LPAs allow reduced frequency for well-established habitats after Year 5. Discuss this with your LPA and include any agreed reduction in the Section 106 agreement.
Q: Does the monitoring obligation transfer if I sell the property?
Yes — the BNG obligation runs with the land. The Section 106 agreement or conservation covenant binds future owners. The monitoring commitment transfers automatically.
Q: What if I miss a monitoring report deadline?
Contact the LPA immediately. Most LPAs will issue a reminder before taking enforcement action. Persistent non-compliance can result in planning enforcement.
Q: Are the monitoring templates really voluntary?
The Natural England MRT templates are voluntary but recommended. Using the standard templates ensures your reports are complete and consistent with the biodiversity gain site register requirements.