Flat 3 6 Upper Belgrave Street London SW1X 8BD Data via plota.co.uk

26/04335/FULL Pending
Extensions & alterationsListed buildingsUtility infrastructure

Proposal

Replacement of the existing condenser and acoustic enclosure with a new unit and enclosure in the same location along with internal alterations to the third and fourth floor maisonette. (Linked with 26/04336/LBC) Data via plota.co.uk

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Application progress

✓
Received
1 Jul 2026
Decision
Awaiting decision

This application is under consideration - no decision has been issued yet.

Other new applications on this street

Flat H 7 - 8 Upper Belgrave Street London SW1X 8BD

Installation of external AC condenser in external housing at main roof level to ...

26/03533/LBC - 29 May 2026

13 Upper Belgrave Street London SW1X 8BA

Removal of temporary timber ply structure, and infill existing opening with timb...

26/03800/LBC - 10 Jun 2026

Nearby new applications

First Floor And Second Floor Maisonette 114 Eaton Square London SW1W 9AA

Installation of a new tiled balcony finish using a reversible pedestal system, t...

26/04478/LBC - 6 Jul 2026

First Floor And Second Floor Maisonette 114 Eaton Square London SW1W 9AA

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26/04477/FULL - 6 Jul 2026

3 West Halkin Street London SW1X 8JJ

Installation of roof level plant and associated alterations. (Linked with 26/044...

26/04465/LBC - 6 Jul 2026

3 West Halkin Street London SW1X 8JJ

Installation of roof level plant and associated alterations. (Linked with 26/044...

26/04464/FULL - 6 Jul 2026

18 Belgrave Mews West London SW1X 8PX

Details of a revised front elevation of 18 Belgrave Square showing the locations...

26/04375/ADLBC - 2 Jul 2026

14 Kinnerton Place South London SW1X 8EH

Display of non - illuminated hanging sign measuring 0.60m x 0.60m. (Linked with ...

26/04393/ADV - 2 Jul 2026

Important details

Council
Westminster
Postcode
SW1X 8BD
Received
1 Jul 2026
Validated
1 Jul 2026
Target decision
26 Aug 2026

Historical activity at this location

28 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025
Internal Alterations.
25/06556/LBC
2025
Replacement of a window with timber French doors with new balcony at rear third floor lev…
25/06479/LBC
2025
Replacement of a window with timber French doors with new balcony at rear third floor lev…
25/06478/FULL
Within ~100m

Nearby activity

2025
1 - 2 Upper Belgrave Street London SW1X 8BD
Variation of Condition 3 of listed building consent dated 10 November 2025 (RN:25/06644/L…
25/08330/LBC
2025 Approved
37 Belgrave Square London SW1X 8NS
Prune N / NW side to give approx. 2.5m clearance from the existing scaffolding for the pr…
25/08093/TCA
2025
13 Upper Belgrave Street London SW1X 8BA
Installation of fan coil units within concealed joinery and an external condenser on the…
25/08079/LBC
2025
13 Upper Belgrave Street London SW1X 8BA
Installation of fan coil units within concealed joinery and an external condenser on the…
25/08078/FULL
2025
14 Wilton Street London SW1X 7AF
Alterations including infill extensions at basement and ground floor to the rear of premi…
25/07927/FULL
2025
14 Wilton Street London SW1X 7AF
Alterations including infill extensions at basement and ground floor to the rear of premi…
25/07928/LBC
2025 Approved
13 Upper Belgrave Street London SW1X 8BA
Internal alterations at first and mezzanine floor levels.
25/05795/LBC
2025 Withdrawn
23 Chester Street London SW1X 7BL
Installation of new lift shaft up the rear elevation of the building.
25/06250/LBC
2025 Withdrawn
23 Chester Street London SW1X 7BL
Installation of new lift shaft up the rear elevation of the building.
25/06021/FULL
2025
117 Eccleston Mews London SW1X 8AQ
External alterations to the front and rear elevations including replacement windows, gara…
25/05762/FULL
2025 Approved
11 Wilton Street London SW1X 7AF
1 x Bay: crown reduce by up to 1.5m on all aspects, retaining sufficient furnishing growt…
25/05495/TCA
2025 Approved
9 Eaton Place London SW1X 8BN
Replacement of existing windows at front and rear fourth floor level with timber frame sa…
25/04418/LBC
2025 Approved
13 Upper Belgrave Street London SW1X 8BA
Installation of a condenser on the roof of the property and replacement glazing in existi…
25/02884/FULL
2025 Approved
13 Upper Belgrave Street London SW1X 8BA
Internal layout alterations to the master suite, and the installation of a chimney breast…
25/03351/LBC
2025
13 Upper Belgrave Street London SW1X 8BA
Installation of a condenser on the roof of the property and replacement glazing in existi…
25/02885/LBC
2025
5 Upper Belgrave Street London SW1X 8BD
Excavation of basements beneath existing house and mews building, associated plant, addit…
25/02229/LBC
2025
5 Upper Belgrave Street London SW1X 8BD
Excavation of basements beneath existing house and mews building, associated plant, and a…
25/02228/FULL
2025
9 Eaton Place London SW1X 8BN
Amendments to the approved layout, internal alterations on all floor levels, and replacem…
25/02131/LBC
2025
9 Eaton Place London SW1X 8BN
Variation of condition 1 of planning permission dated 13 December 2018 (RN: 18/08368/FULL…
25/02130/FULL
2025
37 Belgrave Square London SW1X 8NS
Provision of lead weathering capping to the parapets on the main roof and plinths/cornice…
25/00485/LBC
2020 Approved
13 Wilton Street London SW1X 7AF
Installation of replacement stone step and landing to the main entrance with Portland sto…
20/08020/LBC
2020 Approved
37 Belgrave Square London SW1X 8NS
Refurbishment of existing toilets and associated internal alterations.
20/07935/LBC
2020 Approved
12 Chester Street London SW1X 7BB
Alterations to 12 Chester Street including extension at rear lower ground and ground floo…
20/07222/LBC
2020 Approved
6 Eaton Place London SW1X 8AD
Replacement of lift. Addition of part of the communal area to 1st, 2nd & 3rd floor flats…
20/06298/LBC
2020 Approved
12 Chester Street London SW1X 7BB
Alterations to 12 Chester Street including extension at rear lower ground and ground floo…
20/07221/FULL
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
Source: MHCLG planning statistics · See full council rankings