House, 17 First Street, London, SW3 2LB Data via plota.co.uk

NMA/25/06492 - Non-Material Amendments Approved
Admin / procedural

Proposal

Non-material amendment to planning permission (Alterations to single storey ground floor rear extension, including modifications to the rear elevation.) To Alter the length of the basement window on the front elevation.? Data via plota.co.uk

Track application Save this application and get an email when its status or decision changes. Alerts nearby Get email alerts for new planning applications near this address.
View original council record ↗Last checked

Application progress

✓
Received
30 Oct 2025
✓
Approved
10 Mar 2026

Approved on 10 Mar 2026 · Last checked 22 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 9

Chelsea 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 - 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 Named permitted development rights are withdrawn here.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 ↗
National infrastructure project 865 m away: Thames Tideway Tunnel
The site is 865 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, 166 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 ↗
Also on the record
10 listed buildings within 150 m; Inside the Kensington and Chelsea built-up area; Public transport access: PTAL 5 (very good), TfL 2023, for the 100 m square; Town centre 84 m away: Brompton Cross.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 3 November 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.

Sales history 1

Last sold for £2,060,000 in December 2021. Flat or maisonette, leasehold.

17 December 2021£2,060,000

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

Building

Floor area105 m² (1,130 sq ft)
Energy ratingD (57 out of 100), could reach C
PropertyMid-terrace maisonette, 4 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in June 2024, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

Work with planning data?

Every application in Kensington and Chelsea - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Nearby new applications

3 Nov 2026Pending

South Kensington Underground Station, Pelham Street, London, SW7 2ND

Installation of enclosure supported on new concrete plinth, and extension of con...

LB/26/05590
2 Nov 2026Pending

17-19 Pelham Place, London, SW7 2NQ

Prune 1 x Fig (rear) and 1 x Common Crab Apple (front)

ARB/26/05883
2 Nov 2026Pending

4A Cadogan Square, London, SW1X 0JU

Proposed scheme encompasses internal reconfiguration, sensitive external restora...

PP/26/05845
2 Nov 2026Pending

56 Clabon Mews and, 24 Cadogan Square, London, SW1X 0JP

Partial rebuilding of 56 Clabon Mews with altered roof form to provide a roof te...

PP/26/05842
2 Nov 2026Pending

56 Clabon Mews and, 24 Cadogan Square, London, SW1X 0JP

Partial rebuilding of 56 Clabon Mews with altered roof form to provide a roof te...

LB/26/05843
2 Nov 2026Pending

42 Ovington Square, London, SW3 1LR

Listed building consent for internal and external refurbishment and access alter...

LB/26/05880

Important details

Council
Kensington and Chelsea
Application type
Non-Material Amendments
Postcode
SW3 2LB
Received
30 Oct 2025
Validated
30 Oct 2025
Ward
Brompton and Hans Town
Case officer
Show
Target decision
27 Nov 2025
Decision
Granted
Decision date
10 Mar 2026
Applicant
Show

Consultation & key dates

Comments by
5 Dec 2025

Historical activity at this location

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

This property

Previous applications at this address

2025 Withdrawn
Redevelopment of lower/upper ground maisonette.
PP/25/05288
2025 Withdrawn
Non-material amendment to planning permission 24/06878 (Alterations to single storey grou…
NMA/25/03515
2024 Approved
Details required by Condition 6 (Flood Risk Assessment/Sustainable Drainage Systems Strat…
CON/24/08559
2024 Approved
Alterations to single storey ground floor rear extension, including modifications to the…
PP/24/06878
Within ~100m

Nearby activity

2025 Refused
17 Ovington Street, London, SW3 2JA
Rear closet wing extension at first and second floors to create space for a study and bat…
LB/25/06619
2025 Refused
17 Ovington Street, London, SW3 2JA
Rear closet wing extension at first and second floors to create space for a study and bat…
PP/25/06618
2025 Approved
25 Ovington Street, London, SW3 2JA
Internal and external works including alterations and refurbishment works.
PP/25/05725
2025 Approved
25 Ovington Street, London, SW3 2JA
Internal and external works including alterations and refurbishment works.
LB/25/05726
2025 Approved
27 Ovington Street, London, SW3 2JA
Replacement of 1no. sash window, 1no. set of French doors, and 5no. pairs of sashes into…
LB/25/05118
2025 Approved
17 Ovington Street, London, SW3 2JA
Internal alterations: replacement of non-original internal doors with traditional 4-panel…
PP/25/04647
2025 Approved
17 Ovington Street, London, SW3 2JA
Internal alterations: replacement of non-original internal doors with traditional 4-panel…
LB/25/04648
2025 Approved
Marlborough, 61 Walton Street, London, SW3 2JU
Prune 7 x Silver Birch
ARB/25/04558
2025
45-47 Denyer Street, London, SW3 2LX
Internal layout changes to basement and ground floors of listed building. No external cha…
LB/25/05459
2025 Approved
45-47 Denyer Street, London, SW3 2LX
Verification Order required to confirm the description and numbering of the residential u…
SNN/25/04757
2025 Approved
42-43 Egerton Crescent, London, SW3 2ED and 130 Walton Street, London, SW3 2JJ
Construction of new opening with timber pedestrian gate within rear garden boundary wall…
LB/25/03469
2025 Approved
42-43 Egerton Crescent, London, SW3 2ED and 130 Walton Street, London, SW3 2JJ
Construction of new opening with timber pedestrian gate within rear garden boundary wall…
PP/25/03468
2025 Approved
17 Ovington Street, London, SW3 2JA
Construction of mansard extension with dormer sash windows consistent with neighbouring p…
LB/25/03728
2025 Approved
17 Ovington Street, London, SW3 2JA
Construction of mansard extension with dormer sash windows consistent with neighbouring p…
PP/25/03727
2025 Approved
45-47 Denyer Street, London, SW3 2LX
Internal layout amendments to first floor and second floor of the existing building
LB/25/01140
2025 Approved
33 Ovington Street, London, SW3 2JA
New mansard roof; reduced floor levels at rear garden and in front vaults; refurbishment…
LB/25/01990
2025 Approved
33 Ovington Street, London, SW3 2JA
New mansard roof; reduced floor levels at rear garden and in front vaults; refurbishment…
PP/25/01989
2025 Approved
Flat 12A, Marlborough, 61 Walton Street, London, SW3 2JU
Extension to the East to provide additional living space to one bedroom flat
PP/25/00765
2025 Approved
53 Hasker Street, London, SW3 2LE
Demolition of single storey rear extension and replacement with single storey rear extens…
PP/25/00800
2025 Approved
1 Milner Street, London, SW3 2QA
Garden level rear extension and basement storage room alterations
PP/25/00435
2019 Approved
25 Ovington Street, London, SW3 2JA
Interior refurbishment and renovation; reducing floor levels at rear garden and in front…
PP/19/02485
2019 Approved
51 Walton Street, London, SW3 2HT
Remodelling, alteration and conversion of existing garage to rear study (with car space p…
PP/19/02076
2019 Approved
37 Ives Street, London, SW3 2ND
Installation of two air conditioning condenser units along the rear external wall at firs…
PP/19/01883
2019 Approved
27 Ives Street, London, SW3 2ND
Installation of air conditioning condenser unit on first floor roof terrace, with acousti…
PP/19/01874
2019 Approved
26 Donne Place, London, SW3 2NH
Removal or variation of condition 4 (sash windows in painted timber) of planning permissi…
PP/19/01514
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.

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

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.