{ "name": "bngassessmentcost.co.uk BNG Statutory Duty", "title": "BNG Statutory Duty", "url": "https://bngassessmentcost.co.uk/datasets/bng-statutory-duty/", "csv": "https://bngassessmentcost.co.uk/datasets/bng-statutory-duty.csv", "markdown": "https://bngassessmentcost.co.uk/datasets/bng-statutory-duty/index.md", "computed_at": "2026-10-28", "license": "https://bngassessmentcost.co.uk/terms", "headline": "The BNG Statutory Duty carries 6 published figures read from 3 sources' own pages, from 6 to 12 week, read 23 October 2026.", "quotes": [ "The BNG Statutory Duty carries 6 published figures read from 3 sources' own pages, from 6 to 12 week, read 23 October 2026.", "4 of the 1 named sources read in full publish a figure; 1 publish none, read 23 October 2026." ], "citation": "\"bngassessmentcost.co.uk BNG Statutory Duty\", updated 2026-10-28, https://bngassessmentcost.co.uk/datasets/bng-statutory-duty/.", "changed_since": null, "national": { "unit": "week", "n": 3, "median": 8, "min": 6, "max": 9, "p25": 6, "p75": 9, "mean": 7.6667, "units": { "%": 1, "GBP": 1, "day": 1, "week": 3, "year": 2 }, "published_sources": 4, "named_sources": 18, "read_sources": 1, "not_published": 1, "published_share": 4 }, "by_axis": {}, "rows": [ { "source": "Biodiversity net gain - GOV.UK", "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "figure": "5 years", "value": 5, "unit": "year", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "Temporary development that is permitted for a period of 5 years or less (from 6 August 2026).", "source_class": "primary-government", "text_sha256": "c7f4abdbd81d8bcfb3eb418c92b619ba78bf9306c10afb591296d3889cb911dc" }, { "source": "Biodiversity net gain - GOV.UK", "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "figure": "10%", "value": 10, "unit": "%", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "The objective is met if the post-development biodiversity value is exceeded by at least 10%.", "source_class": "primary-government", "text_sha256": "c7f4abdbd81d8bcfb3eb418c92b619ba78bf9306c10afb591296d3889cb911dc" }, { "source": "Biodiversity net gain - GOV.UK", "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "figure": "12 weeks", "value": 12, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "Where a Biodiversity Gain Plan takes longer than 12 weeks to determine, the planning guarantee applies and the fee must be refunded.", "source_class": "primary-government", "text_sha256": "c7f4abdbd81d8bcfb3eb418c92b619ba78bf9306c10afb591296d3889cb911dc" }, { "source": "Biodiversity net gain - GOV.UK", "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "figure": "6 weeks", "value": 6, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "Appeal decisions can only be challenged through the courts on certain statutory grounds, and a challenge must be brought within 6 weeks of the decision under section 288 of the Town and Country Planning Act 1990.", "source_class": "primary-government", "text_sha256": "c7f4abdbd81d8bcfb3eb418c92b619ba78bf9306c10afb591296d3889cb911dc" }, { "source": "Biodiversity net gain - GOV.UK", "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "figure": "8 weeks", "value": 8, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "The planning authority has 8 weeks (or another agreed timescale) to determine either Plan, and an appeal can made if the planning authority has refused or not approved either Plan in this timescale.", "source_class": "primary-government", "text_sha256": "c7f4abdbd81d8bcfb3eb418c92b619ba78bf9306c10afb591296d3889cb911dc" }, { "source": "Statutory biodiversity credits - GOV.UK", "url": "https://www.gov.uk/guidance/statutory-biodiversity-credits", "figure": "8 weeks", "value": 8, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "It can take up to 8 weeks to approve your application.", "source_class": "primary-government", "text_sha256": "8857b746e3d39d0796ed9e28eef7b439d586c8927dd855c1caafcc44b243a2bf" }, { "source": "Statutory biodiversity credits - GOV.UK", "url": "https://www.gov.uk/guidance/statutory-biodiversity-credits", "figure": "10 weeks", "value": 10, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "We will announce any planned price changes in the price list guidance, giving at least 10 weeks’ notice.", "source_class": "primary-government", "text_sha256": "8857b746e3d39d0796ed9e28eef7b439d586c8927dd855c1caafcc44b243a2bf" }, { "source": "Environment Act 2021", "url": "https://www.legislation.gov.uk/ukpga/2021/30/part/6/crossheading/biodiversity-gain-in-planning/enacted", "figure": "30 years", "value": 30, "unit": "year", "vat": null, "axis": {}, "retrieved_at": "2026-10-23", "quote": "that or another person is required to maintain the enhancement for at least 30 years after the completion of those works, and", "source_class": "primary-government", "text_sha256": "09b59e53b91e6a43a6a32cfe358f3aa36f2c5c39d17b73c040ace338b3e1623b" }, { "source": "Register a biodiversity gain site - GOV.UK", "url": "https://www.gov.uk/guidance/register-a-biodiversity-gain-site", "figure": "£639 ", "value": 639, "unit": "GBP", "vat": null, "axis": {}, "retrieved_at": "2026-10-11", "quote": "It costs £639 to register a biodiversity gain site.", "source_class": "primary-government", "text_sha256": "34c671972991bc39ccca82f040bbfb4c4a4d36141d30d513d221b21a83e1d929" }, { "source": "Register a biodiversity gain site - GOV.UK", "url": "https://www.gov.uk/guidance/register-a-biodiversity-gain-site", "figure": "28 days", "value": 28, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-11", "quote": "You must pay within 28 days of submitting your application.", "source_class": "primary-government", "text_sha256": "34c671972991bc39ccca82f040bbfb4c4a4d36141d30d513d221b21a83e1d929" }, { "source": "Register a biodiversity gain site - GOV.UK", "url": "https://www.gov.uk/guidance/register-a-biodiversity-gain-site", "figure": "6 weeks", "value": 6, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-11", "quote": "We will let you know within 6 weeks if:", "source_class": "primary-government", "text_sha256": "34c671972991bc39ccca82f040bbfb4c4a4d36141d30d513d221b21a83e1d929" } ], "not_published": [ { "source": "Calculate biodiversity value with the statutory biodiversity metric - GOV.UK", "url": "https://gov.uk/guidance/biodiversity-metric-calculate-the-biodiversity-net-gain-of-a-project-or-development", "retrieved_at": "2026-10-27", "reason": "read in full and no accepted figure on the page" } ], "sources": [ { "url": "https://gov.uk/guidance/biodiversity-metric-calculate-the-biodiversity-net-gain-of-a-project-or-development", "label": "Calculate biodiversity value with the statutory biodiversity metric - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://publications.naturalengland.org.uk/publication/6049804846366720", "label": "The Biodiversity Metric Supporting Documents - JP039", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/collections/biodiversity-net-gain", "label": "Biodiversity net gain: guidance for developers, land managers and authorities - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/collections/biodiversity-net-gain-guidance-for-developers-land-managers-and-authorities", "label": "Biodiversity net gain: guidance for developers, land managers and authorities - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/publications/biodiversity-net-gain-bng-statutory-credit-reports-2025-to-2026", "label": "Biodiversity net gain (BNG) statutory credit reports 2025 to 2026 - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/publications/statutory-biodiversity-credits-terms-and-conditions/statutory-biodiversity-credits-terms-and-conditions-of-sale", "label": "Statutory biodiversity credits: terms and conditions of sale - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/publications/statutory-biodiversity-metric-tools-and-guides", "label": "Statutory biodiversity metric tools and guides - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/biodiversity-gain-sites-register-terms-and-conditions", "label": "Biodiversity gain sites register: terms and conditions - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/biodiversity-net-gain", "label": "Biodiversity net gain - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/calculate-biodiversity-value-with-the-statutory-biodiversity-metric", "label": "Calculate biodiversity value with the statutory biodiversity metric - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/register-a-biodiversity-gain-site", "label": "Register a biodiversity gain site - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/statutory-biodiversity-credit-prices", "label": "Statutory biodiversity credit prices - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/statutory-biodiversity-credits", "label": "Statutory biodiversity credits - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/understanding-biodiversity-net-gain", "label": "Understanding biodiversity net gain - GOV.UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/ukpga/2021/30/part/6/crossheading/biodiversity-gain-in-planning/enacted", "label": "Environment Act 2021", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2024/45/contents/made", "label": "The Biodiversity Gain Site Register Regulations 2024", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2024/46/contents/made", "label": "The Biodiversity Gain Site Register (Financial Penalties and Fees) Regulations 2024", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2024/48/contents/made", "label": "The Biodiversity Gain Requirements (Irreplaceable Habitat) Regulations 2024", "license": "the publisher's own terms; quoted for reporting and comment" } ], "methodology": "Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 4 of the 1 named sources that could be read published a usable figure; 1 published none and are recorded as not published, never filled in; 17 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in week (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 109 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per rule with its source and date: the 10% gain condition (Environment Act 2021 Schedule 7A, inserted into the Town and Country Planning Act 1990), the exemptions (de minimis, householder, self-build, biodiversity gain sites), when the small sites metric may be used and by whom, what the biodiversity gain plan must contain, and the authorities' own monitoring fees where published; the joined table of rule, threshold and who may sign it off is what no single government page lays out.", "embed": "

6 to 12 week

3 published figures, BNG Statutory Duty, across 3 sources, read 23 October 2026

Source: bngassessmentcost.co.uk BNG Statutory Duty
" }