1 Sussex Street London SW1V 4RZ

Pending 26/02525/FULL
Council
Date received
16 Apr 2026
Date validated
16 Apr 2026
Postcode
SW1V 4RZ

Description

Variation of condition 1 of planning permission dated 3rd June 2024 (RN:24/01644/FULL) for the Erection of mansard roof extension including new conservation rooflight; raising existing parapet at rear elevation, associated works. Namely, side window being moved to not clash with new stairs as much, and replaced with larger window to match existing adjacent window (cill dropped) and to be clear slimlite glazed painted timber framed sash window with integral glazing bars, white internal spacers and no trickle vents.

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