Evidence. Analysis. Accountability.

Colindale Gardens Overheating Investigation

A documented investigation into overheating, thermal design, and planning-compliance questions affecting a three-storey townhouse within the Colindale Gardens development in the London Borough of Barnet.

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This site presents evidence and raises questions. It does not make legal allegations or assert final conclusions.

The Issue

Persistent overheating in a three-storey townhouse despite modern construction and compliance claims.

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The Evidence

Measured room temperatures, weather comparisons, planning records, and review notes are being assembled into one reproducible record.

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The Question

Was overheating risk properly assessed, approved, and mitigated at design, planning, and construction stages?

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The Objective

Separate what is measured, what is documented, and what remains uncertain before stronger conclusions are drawn.

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Current Focus

Comparing overheating across rooms The processed evidence shows how exposure differs between the monitored spaces, including the Toddler Bedroom and upper circulation areas.
Reconstructing planning condition discharge The planning route needs to show what was required, what was submitted, and what appears to have been approved.
Identifying missing assumptions in modelling Open questions remain around glazing, rooflights, ventilation, orientation, shading, and occupation assumptions.
Testing mitigation against lived performance Measured data is being used to check whether modelled mitigation aligns with real internal temperatures.
Keeping publication evidence-safe Facts, observations, inferences, and hypotheses stay explicitly labelled to avoid overclaiming.

Overheating at a Glance

Measured data

Summer week: Toddler Bedroom

Measured temperature profile against the CIBSE Comfort Limit (26°C).

32.4°C 24.5°C
Mon Tue Wed Thu Fri Sat Sun
Measured CIBSE Comfort Limit (26°C)

Night-time temperatures

Indoor bedroom temperatures compared with outdoor conditions overnight.

31.4°C 20.0°C
22:00 00:00 02:00 04:00 06:00
Indoor measured Outdoor 26°C reference
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Toddler Bedroom records 153.25 h above 26°C at night. The average indoor-minus-outdoor delta for the current comparison window is 6.7°C.

Latest Documents Reviewed

Planning evidence
Block M Overheating Assessment May 2021
Delegated Report Jun 2021
Design and Access Statement Mar 2016
Condition Approval Notice Jul 2021
Roof Plan Drawings Jan 2021
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Investigation Timeline

Key milestones
Mar 2016 Outline planning application submitted
Jul 2016 Outline planning permission granted
2019-2021 Construction period
Jul 2021 Practical completion of Phase 1
Late 2022 First occupation and overheating reported
2023-2024 Resident complaints and correspondence
2024+ Technical investigation and evidence gathering
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Evidence snapshot

4 monitored devices currently contribute to the processed dataset, with 1195.50 h above 26°C in the observed period and 420.50 h during night hours.

Latest note: Investigation overview.