Development Intent
AtlasHarrowPolicyDM9
Planning Atlas›Harrow›DM9
PolicyPoliticalCommitteeOfficersAgents & developersViabilityMapAppeals
Harrow · Local Plan · Policy

DM9 — Managing Flood Risk.

How Harrow actually applies DM9: who leans on it, where it bites hardest, and how often it's invoked. The policy text is the rule; this is the behaviour.

DM9 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 · DM9
Where DM9 is quoted — by ward
Fewer ~0
More citations ~10
Showing
re-scopes the headline figures and the trend
86
times cited
in parsed decision notices
83%
appeal survival
10 dismissed · 2 allowed at appeal
17 of 39
officer reach
44% of officers recorded in this period
Stanmore
top hotspot ward
10 citations
What this policy is about

Policy DM9 requires developments to assess and mitigate flood risk. Residential developments in flood zones must be resistant and resilient, with finished floor levels at least 300mm above the 1 in 100 year flood level. Proposals that increase flood risk will be refused, and developments in floodplains will be resisted if they impede flow or reduce storage capacity.

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

The policy — as adopted

Managing Flood Risk

Policy DM 9: Managing Flood Risk A. Proposals requiring a Flood Risk Assessment must demonstrate that the development will be resistant and resilient to all relevant sources of flooding including surface water. The design and layout of proposals requiring a Flood Risk Assessment must contribute to flood risk management and reduction and: a. minimise the risk of flooding on site and not increase the risk of flooding elsewhere; b. wherever possible, reduce flood risk overall; c. ensure a dry means of escape for occupiers of residential development; d. achieve appropriate finished floor levels which, for residential development in flood zone 3, should be at least 300mm above the modelled 1 in 100 year plus climate change flood level; and e. not create habitable basements in areas of medium and high flood risk. B. Proposals that would fail to make appropriate provision for flood risk mitigation, or which would increase the risk or consequences of flooding, will be refused. C. Sites that are mapped as falling within Developed Zone 3B will be treated as having a high probability of flood risk, for the purposes of applying the sequential and (where necessary) exception tests, provided that the development would be safe and would not increase the risk or severity of flooding elsewhere. Opportunities will be sought from the redevelopment of sites in Developed Zone 3B to restore the natural function and storage capacity of the floodplain. D. Sites that are mapped within Greenfield Zone 3B will be treated as functional floodplain for the purposes of applying the sequential and (where necessary) exception tests. Proposals that involve the loss of undeveloped floodplain or otherwise would constrain its natural function, by impeding flow or reducing storage capacity, will be resisted.

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

How it lands
5% in approvals · 95% in refusals
86 citations in the selected period
The approval/refusal split is subscriber intelligenceUnlock →
Where it bites
Stanmore10
Wealdstone South6
Edgware6
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 DM9 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

DM9 appears most often in Stanmore, Wealdstone South, Edgware. 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
5%
in approvals
4 citations
95%
in refusals
82 citations

This shows the decision reports in which DM9 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 DM9 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
83% survival
10 dismissed · 2 allowed — 12 PINS appeal decisions cite DM9

From Planning Inspectorate decision letters that cite DM9. Dismissed = the council's refusal stood, the policy held; allowed = overturned. The tighter join — this borough's own refusals citing DM9 traced to their specific appeals — is still to come.

Related — follow the thread
Harrow
Back to the borough policy record
Open →
Committee record
What reaches members, and what they do with it
Open →
Case officers
Harrow's decision-makers
Open →
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.