11 Cambridge Street London SW1V 4PP

Pending 26/01735/NMA
Council
Date received
18 Mar 2026
Date validated
18 Mar 2026
Postcode
SW1V 4PP

Description

Amendments to planning permission dated 20th March 2025 (RN 23/07877/FULL) for: Erection of mansard roof extension to existing dwelling at first and second floors level including raised chimney, double glazed timber sash window and other associated works namely, infill of small indent to rear facade up to the upper parapet level.

4.3/10
Planning Authority Score
#182 of 277

Westminster ranks #169 out of 277 councils for householder decision speed. 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.

Westminster decision performance
Based on MHCLG data, 2025
86%
Overall approval rate
Below avg (87%) #189 of 277
79%
Householder approved
Below avg (90%) #263 of 277
67%
Decided in 8 weeks
Below avg (71%) #169 of 277
27%
Extended time limit
Below avg (40%) #41 of 277
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