49 Blenheim Crescent, London, W11 2EF Data via plota.co.uk

PP/26/03554 - Planning Permission Consultation
Extensions & alterationsNew homes

Proposal

Increase size of mansard roof rear addition and enlarge front dormer window, provision of rooflights, access hatch and condenser unit within acoustic enclosure at main roof level, alterations and additions to fenestration, erection of single storey rear extension at lower ground floor level with replacement terrace above, extension at second floor level and subdivision of dwelling to create self-contained studio unit (1b1p) within front lower ground floor, and maisonette (4b5p) across lower ground to third floor Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
2 Jul 2026
Decision
Target date was 27 Aug 2026

Under consideration

No decision has been issued yet. Plota predicted a decision around 30 Oct 2026; it is now day 120.

The consultation period closed on 31 Jul 2026.

Documents

View the documents on the council's website ↗

Site constraints 8

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 Named permitted development rights are withdrawn here.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 55 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.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 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.

Sales history 1

Last sold for £6,150,000 in May 2022. Semi-detached house, freehold.

24 May 2022£6,150,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area308 m² (3,315 sq ft)
Energy ratingE (50 out of 100), could reach C
PropertySemi-detached house, 9 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas, Boiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in December 2021, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Kensington and Chelsea
Application type
Planning Permission
Postcode
W11 2EF
Received
2 Jul 2026
Validated
2 Jul 2026
Ward
Colville
Case officer
Show
Target decision
27 Aug 2026
Applicant
Show

Decision outlook

Day 120, past the statutory target. 54% of extensions in Kensington and Chelsea are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 28 Oct 2026.

Day 12064 days past the 56-day target
33%decided within 8 weeks
95%approved
1,441decided 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 →

Consultation & key dates

Comments by
31 Jul 2026

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

2023 Approved
Alterations at main roof level to increase size of mansard roof addition to the rear and…
PP/23/08143
Within ~100m

Nearby activity

2025 Approved
Flat A, 51 Blenheim Crescent, London, W11 2EF
Prune 1 x Ash (rear)
ARB/25/05102
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
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 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
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
Maisonette Lower Ground and Ground Floor, 47 Blenheim Crescent, LONDON, W11 2EF
Fell 1 x Birch (rear)
ARB/22/04342
2022 Withdrawn
5 Codrington Mews, LONDON, W11 2EH
Renovation of house including construction of single storey basement; installation of air…
PP/22/04020
2022 Approved
5 Codrington Mews, LONDON, W11 2EH
Creation of a single dwelling house across ground and first floors, along with associated…
PP/22/00665
2021 Approved
First To Third Floor Flat, 25 Blenheim Crescent, London, W11 2EF
Replacement of original windows with like-for-like double glazed, timber units; introduct…
PP/21/07847
2021 Withdrawn
First To Third Floor Flat, 25 Blenheim Crescent, London, W11 2EF
Installation of a double glazed greenhouse and solar panels on the roof terrace; replacem…
PP/21/07844
2021 Withdrawn
5 Codrington Mews, London, W11 2EH
Renovation, including construction of basement storey, installation of air source heat pu…
PP/21/06970
2021 Refused
32 Elgin Crescent, London, W11 2JR
Creation of basement level with associated lightwells, extension of existing front lightw…
PP/21/06140
2021 Approved
Lower Ground And Ground Floor Maisonette, 86 Ladbroke Grove, LONDON, W11 2HE
Prune 2 x Silver Birch (rear)
ARB/21/05832
2021 Approved
23 Blenheim Crescent, LONDON, W11 2EF
FELL 1x Ash in rear garden
ARB/21/01987
2021 Approved
25 Blenheim Crescent, LONDON, W11 2EF
Prune 1 x Acacia (rear)
ARB/21/01897
2020 Refused
87 Ladbroke Grove, LONDON, W11 2HD
Replacement of front and rear windows at first floor level with like for like double glaz…
PP/20/07221
2017 Approved
4 Codrington Mews, LONDON, W11 2EH
Removal of condition 7 (EcoHomes BREEAM) of planning permission 14/005042
PP/17/01676
2017 Refused
4 Codrington Mews, LONDON, W11 2EH
Variation of condition 2 (approved drawings) of planning permission 14/05042 to allow all…
PP/17/00998
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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.