77 Winchester Street London SW1V 4NU Data via plota.co.uk

26/03899/FULL - Full Planning Permission Application Pending
Solar & renewablesUtility infrastructure

Proposal

Installation of a small roof-mounted Automatic Opening Vent (AOV) and two air source heat pump condenser units on the existing flat roof. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
15 Jun 2026
✓
Validated
17 Jul 2026
Decision
Target date was 11 Sept 2026

As of 7 Aug 2026, the council is no longer showing this application on their planning portal. It may have been withdrawn or re-listed under a different reference. We've stopped checking it for updates.

Documents 13

Statements & assessments 1

PDF HERITAGE STATEMENT Heritage Statement · 12 Jun 2026 View ↗

Plans & drawings 7

PDF PROPOSED ELEVATIONS Drawing · 12 Jun 2026 View ↗ PDF PROPOSED ROOF PLAN Drawing · 12 Jun 2026 View ↗ PDF PROPOSED SECOND AND THIRD FLOOR PLANS Drawing · 12 Jun 2026 View ↗ PDF EXISTING ELEVATIONS Drawing · 12 Jun 2026 View ↗ PDF EXISTING ROOF PLAN Drawing · 12 Jun 2026 View ↗ PDF EXISTING SECOND AND THIRD FLOOR PLANS Drawing · 12 Jun 2026 View ↗ PDF EXISTING SITE LOCATION AND BLOCK PLAN Drawing · 12 Jun 2026 View ↗

Application forms 1

PDF APPLICATION FORM REDACTED Application Form · 12 Jun 2026 View ↗

Other documents 4

PDF 2ND INVALID LETTER Background Papers · 17 Jul 2026 View ↗ PDF RECEIPT OF APPLICATION Other · 17 Jun 2026 View ↗ PDF 1ST INVALID LETTER Background Papers · 17 Jun 2026 View ↗ PDF DOCUMENTS-SUMMARY Background Papers · 12 Jun 2026 View ↗

All documents on the council site ↗

Site constraints 11

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Pimlico conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
Article 4 direction
Article 4 Basement Development Permitted Rights Removed. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Archaeological priority area: City of Westminster APA 3.2
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
Air quality management area: Westminster AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
National infrastructure project 139 m away: Thames Tideway Tunnel
The site is 139 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted. Also within 2 km: London Strategic Heat Main Project (at pre-application, 293 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Central activities zone
The core of central London in the London Plan.
Offices, culture and the other strategic functions of the centre take priority over new housing here.
16 listed buildings within 150 m
Nearest: 78-90, Alderney Street Sw1, Grade II, 59 m away · 16 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 16 with distances
Historic England ↗
Also on the record
Registered park or garden 180 m away: Eccleston Square; Inside the City of Westminster built-up area; Public transport access: PTAL 6a (excellent), TfL 2023, for the 100 m square.
Not affected
Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Important details

Council
Westminster
Application type
Full Planning Permission Application
Postcode
SW1V 4NU
Received
15 Jun 2026
Validated
17 Jul 2026
Ward
Pimlico North
Case officer
Show
Target decision
11 Sept 2026
Agent
Mike Beck Design Ltd

Decision outlook

Day 104, past the statutory target. 83% of utility and infrastructure works in Westminster are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 20 Jul 2026.

Day 10448 days past the 56-day target
49%decided within 8 weeks
90%approved
415decided in the last year

Plota live figures for utility and infrastructure works decided by Westminster in the last twelve months, from validation. Westminster decision record →

Consultation & key dates

Env. assessment
No

Historical activity at this location

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

This property

Previous applications at this address

2018 Approved
Erection of single storey rear extensions at lower ground floor level at 77A and 79A; and…
18/08254/FULL
Within ~100m

Nearby activity

2025
88 Cambridge Street London SW1V 4QG
Reinstatement of windows to the elevation of Clarendon Street.
25/06404/FULL
2025
73 Alderney Street London SW1V 4HH
Replacement of first floor railings with traditional concreter balustrade; Replacement of…
25/06051/FULL
2025
Cumberland Court Cumberland Street London SW1V 4LR
Retention of metal staircase within lightwell including gate on the Cumberland Street sid…
25/03722/FULL
2025
2A Sutherland Street London SW1V 4LB
Removal of existing fibre optic equipment and cabling and installation of new cables to f…
25/01063/CLOPUD
2025
2 Cumberland Street London SW1V 4LT
Community Fibre (CFL) are proposing the removal of existing fibre optic equipment and cab…
25/01059/CLOPUD
2025
73 Alderney Street London SW1V 4HH
Installation of air conditioning condensing unit within an acoustic enclosure on the rear…
25/00039/FULL
2024
73 Alderney Street London SW1V 4HH
Alterations to external railing and boundary treatement and reconfiguration of external s…
24/06079/FULL
2024
Top Flat 95 Winchester Street London SW1V 4NX
Installation of a new balustrade.
24/05258/FULL
2024
73 Alderney Street SW1V 4HH
Replacement of existing roof glazing at basement level roofing of existing small open yar…
24/03235/FULL
2024
51A Alderney Street London SW1V 4HH
Erection of a single storey rear infill extension at Lower Ground Floor.
24/01525/FULL
2023 Approved
First Floor Flat 64 Alderney Street London SW1V 4EX
Erection of an infill single storey rear extension at first floor level over the existing…
23/08932/FULL
2023 Approved
Lower Ground Floor Flat 78 Alderney Street London SW1V 4EY
Alterations to vaults including partial excavation to front vaults and new front entrance…
23/03395/FULL
2023 Approved
Lower Ground Floor Flat 78 Alderney Street London SW1V 4EY
Alterations to vaults including partial excavation to front vaults, new front entrance ca…
23/03396/LBC
2023 Approved
94 Cambridge Street London SW1V 4QG
T1 1 x sycamore: crown reduce to previous, most recent reduction points retaining shorten…
23/07644/TCA
2023
Cumberland Court 1-3 Cumberland Street London SW1V 4LR
Retention of metal staircase within lightwell and gate on the Cumberland Street side of C…
23/05309/FULL
2023
Cumberland Court Cumberland Street London SW1V 4LR
Use of part of car park as a last mile logistics hub (Sui Generis) (Level 1B, Q Park, Cum…
23/04199/FULL
2022 Approved
13 Cumberland Street London SW1V 4LS
Installation of a condenser at roof level for use as an air source heat pump or air condi…
22/08318/FULL
2022 Approved
77 Alderney Street London SW1V 4HF
1 x ash: crown reduce to previous, most recent reduction points.
22/08564/TCA
2022 Approved
48 Alderney Street London SW1V 4EX
Variation of Condition 1 and removal of Condition 3 of planning permission dated 16 Decem…
22/05098/FULL
2022 Approved
Flat 1 81 Alderney Street London SW1V 4HF
Replacement door and windows to rear elevation, and raising height of parapet and replace…
22/03804/FULL
2016 Approved
49A Alderney Street London SW1V 4HH
Installation of grab rail to a column at the front entrance of property.
16/03713/FULL
2016 Approved
22B Cumberland Street London SW1V 4LT
Reinstatement of butterfly profile, extension over closet wing at main roof level, instal…
16/00607/FULL
2016 Refused
52 Cambridge Street London SW1V 4QQ
Display of internally illuminated fascia sign measuring 30mm x 0.05mm.
16/03885/ADV
2016 Approved
66 Cambridge Street London SW1V 4QQ
Erection of a single storey rear extension at lower ground floor level (Flat 66a).
16/00758/FULL
2016 Approved
76-78 Cambridge Street London SW1V 4QQ
1 x hawthorn: crown reduce by 30%
16/01157/TCA
Westminster
Planning Authority Score
3.5/10
Below average
#221 of 296 councils
Relevant to this application:
Householder decisions

Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% 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 81% approved vs 90% nationally.

One of the strictest councils
only 81% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Westminster decision statistics
Based on MHCLG data, the year to March 2026
86%
Overall approval rate
Below avg (87%) #201 of 296
81%
Householder approved
Below avg (90%) #277 of 296
44%
Decided in 8 weeks
Below avg (63%) #258 of 296
28%
Extended time limit
Below avg (41%) #46 of 296
83%
Minor dwellings approved
12 decided (1-9 homes)
67%
Major dwellings approved
3 decided (10+ homes)
81%
Change of use approved
133 decided
4,602
Total decisions
648 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use