Development Intent
AtlasHarrowOfficersCatriona Cooke
Case officer · Harrow Planning

Catriona Cooke.

Active — last recorded decision May 2026

A case officer at Harrow with an approval rate of 73% across 440 decided planning applications, spanning 22 wards.[1] Decision speed and appeal performance publish when decision notices are ingested.

Planning officer440 decisions73% approvalSave
Harrow · ward map
Approval rate — by ward
Lower ~68%
Higher ~90%
ShowingAll years · subscriber →across all years on record — a period re-scopes the headline figures and the trend
At a glanceEach metric links to the investigation behind it
All investigations →
440
Applications
2020–26
Approval rate over time — tougher or softer 🔒Dashed line = London average
avg 81%64%202076%202170%202266%202367%202488%202578%2026
Approval-rate trend is subscriber dataSubscribe to see the trend →
What they decide — by application type
How they compareVersus peers
Approval rate73% · 37th of 72
higher is betterdashed = London avg
Decision time · publishes with decision notices
in development
Appeal overturn · publishes with decision notices
in development
How this officer decides — from their own reports212 officer reports parsed
4%
Approves despite concerns
of approvals record a documented reservation
1%
Negotiated approvals
approvals mentioning revisions/amendments
2%
"On balance" reports
reports using explicit balancing language
59%
Bespoke reasoning
of report text written for the case, not recited
What they write about — vs Harrow's average officer

Topic mentions per 1,000 words of their own report text (boilerplate stripped), indexed against all parsed Harrow reports. Attention, not stance.

Character & heritage
1.17× borough avg
Flooding & drainage
1.03× borough avg
Bulk & massing
0.99× borough avg
Materials & detailing
0.95× borough avg
Daylight & sunlight
0.91× borough avg

Mark = borough average (1×). Bar capped at 2×.

How they reason — coded from their reports

Cooke's corpus is heavily weighted toward Certificate of Lawfulness applications (GPDO checklist volume calculations) alongside standard householder extensions, and where she does write free narrative she is explicit that SPD depth/height figures are 'guidance only' when she is minded to accept a modest overshoot, naming the specific neighbouring extension depth as the comparator. Her refusals on principal-use matters (HMO conversion, industrial-site loss) work through the specific policy criteria in sequence (DM30 A, B, C) before reaching a conclusion.

Observable habits

· explicitly labels SPD numeric guidance (depth, height) as 'guidance only' when accepting a modest overshoot, naming the exact overshoot in metres

· compares a proposed extension's depth directly against a named neighbour's existing extension depth as the acceptability test

· on principle/use-class refusals, works through the specific lettered policy sub-criteria (DM30(A), DM30(B), DM30(C)) in sequence rather than a single combined judgement

What their reports consistently look for

· what this officer's reports consistently look for: the exact depth/height of a comparable neighbouring extension before treating an SPD overshoot as acceptable

· what this officer's reports consistently look for: which specific lettered sub-criterion of a use-class policy (e.g. DM30 A/B/C) a scheme fails

· what this officer's reports consistently look for: whether a use is designated a Locally Significant Industrial Site even where not formally labelled as such on the policies map

Assigned Catriona Cooke on a live case?What they pay attention to, how they reason, and what their reports consistently look for — so you can address it before they raise it.Subscribe to unlock →
In their own words

this document is guidance only

PL/0256/23

the LPA would consider this to be a LSIS in accordance with Policy E4

PL/0273/24

Measured from 212 published Harrow officer reports written by this officer, with recited policy boilerplate stripped before any counting. These describe how this officer works and writes — they are not outcome predictions. Every quote is from a named public report.

Policy playbook — what this officer cites[3]

The policies this officer cites most in their own reports — times cited across 212 parsed reports. Whether refusals citing each survive appeal isn't traced per policy yet.

D3
26 times cited
DM1Achieving a High Standard of Development
24 times cited
D12
22 times cited
DM10On Site Water Management and Surface Water Attenuation
22 times cited
CS1.B
21 times cited
GR1
5 times cited
CS1.D
4 times cited
D11
4 times cited
Which policies this officer leans on is subscriber intelligenceSubscribe to unlock →
Decisions by ward

Where this officer's caseload concentrates, 2020–26.[1] Click the map above to focus this page on a ward, or a row to open the ward.

Recent applications
Address
Reference
Type
Outcome
Date
PL/0671/26
Householder
Approved
2026-05-21
PL/0838/26
Householder
Approved
2026-05-20
PL/0671/26
Householder
Approved
2026-05-21
PL/0838/26
Householder
Approved
2026-05-20
Full application history locked
Subscribe to see all 440 decisions →
Consultants approved most— subscriber data
1. KDB Building Designs Ltd
2. The Market Design & Build
3. Shah Designs Ltd
4. V-Design CAD Services Ltd.
At a glance
OfficerCatriona Cooke
BoroughHarrow
RolePlanning officer
Experience
Applications440 (2020–26)
Approval rate73%
London approval avg81%
Who decides here
GovernmentMayor of LondonCouncilCommitteeOfficersDecisionsApplicantsInspectorate
Related investigations
When committees overrule officers like this one →
How often members depart from officer recommendations, and how those overrides fare at appeal.
How much gets decided without a committee →
The delegated share by borough and officer — where the real power over decisions sits.
Sources & method
  1. [1]Applications decided, approval rate, per-year trend and ward breakdown — London Borough of Harrow planning register and published decision notices, 2020–26. · methodology
  2. [2]Appeal overturn and decision-time benchmarks — Planning Inspectorate (PINS) appeal decisions and application date pairs; not yet computed per officer, shown as a dash until they are. · PINS appeals casework
  3. [3]Condition load — mean effective conditions attached to Harrow decision notices (grant/split), parsed from the published notice text; a borough figure, not yet split per case officer.
  4. [4]"How this officer decides", the policy playbook and all quotes — parsed from 212 published Harrow officer reports written by this officer, recited policy boilerplate stripped before counting; disposition text coded from their own reasoning with every quote machine-verified verbatim. Descriptive of how they work — not outcome predictions.
Methodology is published in full so every number is traceable to its primary source.