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Harrow · Local Plan · Policy

DM20 — Protection of Biodiversity and Access to Nature.

How Harrow actually applies DM20: who leans on it, where it bites hardest, and how often it's invoked. The policy text is the rule; this is the behaviour.

DM20 is a published Harrow planning policy. This page records where it appears in the council's published planning decisions.

Cited under: Harrow Local Plan (adopted)

Harrow · DM20
Where DM20 is quoted — by ward
Fewer ~0
More citations ~9
Showing
re-scopes the headline figures and the trend
40
times cited
in parsed decision notices
80%
appeal survival
4 dismissed · 1 allowed at appeal
17 of 39
officer reach
44% of officers recorded in this period
Stanmore
top hotspot ward
9 citations
What this policy is about

Policy DM20 protects biodiversity and access to nature in Harrow. It requires new developments to retain and enhance existing biodiversity features, avoid or mitigate potential impacts, and provide replacement features if loss is unavoidable. Proposals that harm biodiversity or green corridors will be resisted.

Plain-English summary of the adopted policy text below. The full text is the rule; this is the gist.

The policy — as adopted

Protection of Biodiversity and Access to Nature

Policy DM 20: Protection of Biodiversity and Access to Nature A. Proposals that would be detrimental to locally important biodiversity or that would increase local deficiencies in access to nature will be resisted. Regard will be had to any relevant provisions in the Harrow Biodiversity Action Plan. B. The design and layout of new development should retain and enhance any significant existing features of biodiversity value within the site. Potential impacts on Biodiversity should be avoided or appropriate mitigation sought. Where loss of a significant existing feature of biodiversity is unavoidable, replacement features of equivalent biodiversity value should be provided on site or through contributions towards the implementation of relevant projects in Harrow’s Biodiversity Action Plan. C. Green corridors and green chains will be retained. Proposals that would prejudice their function as routes for the passage of wildlife through the urban environment will be resisted.

Verbatim from the adopted Harrow plan · source document. The council's published plan is the authoritative version.

How it lands
45% in approvals · 55% in refusals
40 citations in the selected period
The approval/refusal split is subscriber intelligenceUnlock →
Where it bites
Stanmore9
North Harrow5
Roxeth5
What cites it — application types
all years on record · click a slice to filter
What it means in practice

Not filled in yet. This will hold how officers actually argue DM20 case by case, classified from their decision reports — the classification pass hasn't run. Nothing is paraphrased in its place.

What the published record shows

DM20 appears most often in Stanmore, North Harrow, Roxeth. It appears across 17 of 39 officers recorded in this period. The map shows the pattern for the selected period.

Who cites it — case-officer spreadfrom parsed decision notices · click an officer
Who leans on this policy — and how often — is subscriber intelligenceSubscribe to unlock →
Why it is cited — and what follows
45%
in approvals
18 citations
55%
in refusals
22 citations

This shows the decision reports in which DM20 appears. It does not yet claim that the policy caused those outcomes.

Reason · role · consequence

Not filled in yet — the classification pass over the citing passages hasn't run. When it has, this shows why DM20 was used, whether it supported approval or refusal, and what changed as a result. No conclusion is shown until that classification has been checked.

Why this policy is cited, and what follows, is subscriber intelligenceSubscribe to unlock →
Does it hold up? — appeal performance
80% survival
4 dismissed · 1 allowed — 5 PINS appeal decisions cite DM20

From Planning Inspectorate decision letters that cite DM20. Dismissed = the council's refusal stood, the policy held; allowed = overturned. The tighter join — this borough's own refusals citing DM20 traced to their specific appeals — is still to come.

Related — follow the thread
Harrow
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Committee record
What reaches members, and what they do with it
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Case officers
Harrow's decision-makers
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Citations, officer spread, ward and application-type counts parsed from published Harrow decision notices (high-confidence parses, approvals and refusals), joined to the canonical application record. One citation = one decision citing the policy. See the policy overview for every policy cited.

Atlas intelligence summarises patterns and observations from published planning records. Past decisions do not indicate how any future application will be determined. Every application is assessed on its own merits, having regard to the proposal, site, evidence and policies applying at the time. This information is provided for general information only and is not planning, legal, financial or professional advice.