Development Intent
AtlasMertonOfficersCalum Mcculloch
Case officer · Merton Planning

Calum McCulloch.

Active — last recorded decision May 2026

A case officer at Merton with an approval rate of 92% across 567 decided planning applications, spanning 21 wards.[1] Decision speed and appeal performance publish when decision notices are ingested.

Planning officer567 decisions92% approvalSave
Merton · 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 →
567
Applications
2020–26
Approval rate over time — tougher or softer 🔒Dashed line = London average
avg 81%100%202088%202193%202267%202391%202492%202586%2026
Approval-rate trend is subscriber dataSubscribe to see the trend →
What they decide — by application type
How they compareVersus peers
Approval rate92% · 8th of 17
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 reports350 officer reports parsed
7%
Approves despite concerns
of approvals record a documented reservation
8%
Negotiated approvals
approvals mentioning revisions/amendments
8%
"On balance" reports
reports using explicit balancing language
75%
Bespoke reasoning
of report text written for the case, not recited
What they write about — vs Merton's average officer

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

Trees & landscape
1.67× borough avg
Bulk & massing
1.44× borough avg
Character & heritage
1.39× borough avg
Materials & detailing
1.23× borough avg
Energy & sustainability
1.19× borough avg

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

How they reason — coded from their reports

McCulloch's caseload spans householder extensions through small multi-unit residential schemes, and his reports consistently split the assessment into a labelled 'Character and Appearance' paragraph followed by a separate labelled 'Neighbouring Amenity' paragraph, each addressed to specific named neighbours by house number, with a direct comparison to that neighbour's own existing depth/extension as the anchor for the amenity verdict. On larger schemes he is meticulous about tabulating each unit's proposed vs required GIA and external amenity space against the London Plan/Nationally Described Space Standards before reaching a standard-of-accommodation conclusion, and is willing to accept a shortfall against the CURRENT London Plan where a scheme was submitted and substantially progressed under the PRIOR London Plan's standards.

Observable habits

· splits every report into a distinct 'Character and Appearance' paragraph and a separate 'Neighbouring Amenity' paragraph, addressed sequentially rather than blended

· compares a proposed extension's depth/height directly against the SAME named neighbour's own existing extension of similar type, before reaching an enclosure/daylight verdict

· on space-standard shortfalls against a NEWLY adopted London Plan, checks the application's own submission date and accepts compliance with the PRIOR London Plan's standards where the delay was a legal-agreement/administrative one rather than a design failing

What their reports consistently look for

· whether a proposed extension's depth/height is proportionate to, or exceeds, the SAME named neighbour's own existing comparable feature

· whether each residential unit's GIA and external amenity space meet the applicable London Plan/NDSS minimum standard table, with the applicable plan version checked against submission date where relevant

· whether cycle/car parking provision complies with the applicable London Plan parking standards table for the site's PTAL rating

Assigned Calum McCulloch 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

Given the outdoor space complies with the London Plan 2016 and National Space Standards, Officers consider outdoor space provided in this instance acceptable.…Given the cycle parking complies with Policy 6.13 of the London Plan 2016, Officers consider the number of cycle parking spaces provided acceptable

20/P0303

No. 278 has an existing extension at 3.4m in depth and no. 280 has an extension 3m depth. As such, there is not expected to be any harm to amenity from increased sense of enclosure or loss of light to the adjacent properties

20/P0389

Measured from 350 published Merton 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 350 parsed reports. Whether refusals citing each survive appeal isn't traced per policy yet.

CS14Design. Strategic
240 times cited
DM D2
238 times cited
DM D3
205 times cited
D4
154 times cited
7.4
102 times cited
CS9Housing Provision. Strategic
101 times cited
7.6
95 times cited
DM D4
77 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
26/HOUSE/0575
Householder
Approved
2026-06-04
26/HOUSE/0506
Householder
Approved
2026-05-28
26/HOUSE/0575
Householder
Approved
2026-06-04
26/HOUSE/0506
Householder
Approved
2026-05-28
Full application history locked
Subscribe to see all 567 decisions →
Consultants approved most— subscriber data
1. Rolfe Judd Planning
2. Cornerstone Architectural Design Ltd
3. Planning Additions
4. Blakeney Leigh Ltd
At a glance
OfficerCalum McCulloch
BoroughMerton
RolePlanning officer
Experience
Applications567 (2020–26)
Approval rate92%
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 Merton 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 — Merton's decision-notice parsing is limited coverage, so no borough or officer figure is shown.
  4. [4]"How this officer decides", the policy playbook and all quotes — parsed from 350 published Merton 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.