Flat 1, 43-45 Blenheim Crescent, London, W11 2EF Data via plota.co.uk

Consultation PP/26/05874
Extensions & alterations
Council
Kensington and Chelsea 5.1/10
Date received
around 4 Nov 2026
Date validated
4 Nov 2026
Postcode
W11 2EF

Description

Installation of glazed rear extension with glass lean to at lower ground floor level and alterations at lower ground and ground floor Flat 1, including like for like replacement of single glazed timber sash windows with double glazed timber sash windows 43-45 Blenheim Crescent Data via plota.co.uk

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Last checked

Decision outlook

Plota predicts a decision between 4 Jan 2027 and 12 Feb 2027, from Kensington and Chelsea's recent extensions.

Day 2 of the 56-day target. Kensington and Chelsea usually decides extensions by day 78.

Day 276 days to the predicted decision (day 78)
35%decided within 8 weeks
95%approved
1,595decided in the last year

Plota live figures for extensions decided by Kensington and Chelsea in the last twelve months, from validation. Kensington and Chelsea decision record →

Site constraints 9

Ladbroke 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 ↗
2 Article 4 directions
Article 4 - No 68 · Article 4 - No 100. Named permitted development rights are withdrawn here.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.
Tree preservation order
Consent is needed before work on protected trees.
Not every council has published its orders as open data, so no order shown is not proof there is none.
Air quality management area: Kensington and Chelsea 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 ↗
Registered park or garden about 75 m away: Ladbroke Estate
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
Also on the record
1 listed building within 150 m of the postcode pin; Inside the Kensington and Chelsea built-up area; Public transport access: PTAL 4 (good), TfL 2023, for the 100 m square; Town centre about 92 m away: Portobello.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 5 November 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, 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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Other new applications on this street

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Nearby new applications

4 Nov 2026Pending

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Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Approved
Flat A, 51 Blenheim Crescent, London, W11 2EF
Prune 1 x Ash (rear)
ARB/25/05102
2025 Approved
Flat, 37 Kensington Park Road, London, W11 2EU
Verification Order required to confirm the description of the newly formed residential un…
SNN/25/04911
2025 Approved
Third Floor Flat, 51 Elgin Crescent, London, W11 2JU
Internal reconfiguration and conversion of existing loft space to bedroom.
PP/25/02651
2025 Approved
4 Kensington Park Mews, London, W11 2EY
Alternations to front roof; removal of roof lantern and replacement with roof light; inst…
PP/25/00806
2025 Approved
Maisonette Lower Ground and Ground Floor, 47 Blenheim Crescent, LONDON, W11 2EF
FELL 1 x Prunus (rear)
ARB/25/00482
2025 Approved
Galsworthy House, Elgin Crescent, LONDON, W11 2JW
FELL 1 x Silver Maple (front)
ARB/25/00175
2024 Approved
Lower Ground And Ground Floor Maisonette, 86 Ladbroke Grove, LONDON, W11 2HE
Prune 2 x Silver Birch (Betula pendula) in rear garden
ARB/24/07701
2024 Approved
Flat C, 45 Elgin Crescent, LONDON, W11 2JU
Construction of balcony at rear of first floor flat, replacement of sash window with Fren…
PP/24/06177
2024 Approved
Ground Floor Flat, 20 Elgin Crescent, LONDON, W11 2JR
Prune 1x London Plane (Platanus x hispanica) in rear garden
ARB/24/06097
2024 Approved
Basement and Ground Floor Flat, 25 Blenheim Crescent, LONDON, W11 2EF
Prune 1 x Robinia (Robinia psuedacacicia) in rear garden
ARB/24/04147
2024 Approved
Basement/ground Floor Flat, 27 Blenheim Crescent, LONDON, W11 2EF
Prune 1 x Ash (rear)
ARB/24/02478
2023 Approved
49 Blenheim Crescent, LONDON, W11 2EF
Alterations at main roof level to increase size of mansard roof addition to the rear and…
PP/23/08143
2023 Approved
Second And Third Floor Flat, 34 Elgin Crescent, LONDON, W11 2JR
Replacement roof covering; replacement rear roof level dormers and roof light; replacemen…
PP/23/08385
2023 Approved
18 Elgin Crescent, London, W11 2JR
Prune 1 x Ash and 1 x Bay (rear)
ARB/23/05732
2023 Withdrawn
Third Floor Flat, 27 Blenheim Crescent, LONDON, W11 2EF
Removal of butterfly roof and provision of roof terrace to third floor flat. Installation…
PP/23/02693
2023 Approved
3 Kensington Park Mews, LONDON, W11 2EY
Extend rear mansard and enlarger front dormer in line with neighbouring properties. Repla…
PP/23/01646
2023 Withdrawn
Basement Flat (rear) and Basement Flat (front), 22 Elgin Crescent, LONDON, W11 2JR
Amalgamation of front and rear basement flats ***WITHDRAWN***
PP/23/00839
2022 Approved
First To Third Floor Flat, 25 Blenheim Crescent, LONDON, W11 2EF
Installation of glazed box on top of stairs for roof terrace access, new skylights and an…
PP/22/05563
2022 Approved
5 Codrington Mews, LONDON, W11 2EH
Construction of single storey basement; installation of air source heat pump within loft…
PP/22/07166
2022 Approved
First Floor Flat, 22 Elgin Crescent, LONDON, W11 2JR
Upgrade windows from single glazing to double glazing
PP/22/07334
2016 Approved
13 Kensington Park Mews, LONDON, W11 2EY
Construction of a single storey basement under full footprint of property, extending part…
PP/16/07041
2016 Refused
Flat C, 45 Elgin Crescent, LONDON, W11 2JU
Erection of balcony at rear of first floor flat, replacement of sash window with French d…
PP/16/02728
2016 Refused
84 Ladbroke Grove, LONDON, W11 2HE
Amalgamation of two existing flats (B & C) into one two bedroom flat.(Certificate of Prop…
CL/16/03705
2016 Approved
7 Codrington Mews, LONDON, W11 2EH
Construction of basement under existing footprint of basement with alterations to upper f…
PP/16/00648
2016 Approved
Flat 9, Galsworthy House, Elgin Crescent, LONDON, W11 2JW
Prune 1 x Silver Maple
ARB/16/00761
Kensington and Chelsea
Planning Authority Score
5.1/10
Average
#144 of 296 councils
Relevant to this application:
Householder decisions

Kensington and Chelsea ranks #174 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Kensington and Chelsea decision statistics
Based on MHCLG data, the nine months to December 2025
93%
Overall approval rate
Above avg (87%) #58 of 296
94%
Householder approved
Above avg (90%) #110 of 296
61%
Decided in 8 weeks
Below avg (63%) #174 of 296
40%
Extended time limit
Below avg (41%) #152 of 296
94%
Minor dwellings approved
455 decided (1-9 homes)
87%
Change of use approved
53 decided
1,839
Total decisions
135 refused in the nine months to December 2025
Source: MHCLG planning statistics · See full council rankings