10 Great Castle Street London W1W 8LP

Pending 26/01708/FULL
Council
Date received
17 Mar 2026
Date validated
17 Mar 2026
Postcode
W1W 8LP

Description

Variation of condition 4 of planning permission dated 15th August 2024 (RN 24/02645/FULL) for the installation of diesel back-up generator on the first floor terrace. NAMELY, to amend the condition to clarify that the generator may be used to maintain essential operational, financial, and security systems during power outages; Confirm that it will not be used for commercial energy supply or grid-support services such as STOR; and Retain the approved noise limits and testing restrictions to ensure there is no additional environmental impact.

Westminster
Planning Authority Score
3.7/10
Below average
#209 of 292 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #227 out of 292. Only 27% of applications have the time limit extended, well below the 40% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 79% approved vs 90% nationally.

One of the strictest councils
only 79% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision performance
Based on MHCLG data, 2025
86%
Overall approval rate
Below avg (87%) #200 of 292
79%
Householder approved
Below avg (90%) #279 of 292
53%
Decided in 8 weeks
Below avg (64%) #227 of 292
27%
Extended time limit
Below avg (40%) #43 of 292
86%
Minor dwellings approved
14 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
86%
Change of use approved
140 decided
4,828
Total decisions
669 refused in 2025