Postcode record · Kensington And Chelsea
SW3 1AX.
SW3 1AX has 50 known premises and 18 planning records — 15 approved of 16 decided (93.8%). 33 EPC records.
Postcode SW3 1AX · boundary not held, centred on the postcodeApprovedRefusedOther18 on the map — every match
At a glance · this postcodeKensington And Chelsea profile →
50
Premises
known addresses (UPRNs)
18
Applications
16 decided
93.8%
Approval rate
15 approved · 1 refused
56 days
Median decision time
average 55 days · 18 dated decisions
33
EPC records
ratings C 18 · D 15
18
Mapped applications
inside the postcode shape
Postcode unit boundary from Ordnance Survey; premises and applications inside it. Aggregates describe the area, not any single premises.
Property
What is it?
SW3 1AX has 50 known premises and 18 planning records — 15 approved of 16 decided (93.8%). 33 EPC records.
Premises (18 of 50 shown)
Name
Details
UPRN 217003384
UPRN 217003385
UPRN 217003386
UPRN 217003387
UPRN 217003388
UPRN 217003389
UPRN 217003390
UPRN 217003391
UPRN 217003392
UPRN 217003393
UPRN 217003384
UPRN 217003385
UPRN 217003386
Show all 10 rows
UPRN 217003387
UPRN 217003388
UPRN 217003389
UPRN 217003390
UPRN 217003391
UPRN 217003392
UPRN 217003393
Planning
What happened?
18 planning applications across the postcode; 15 approved of 16 decided (93.8%). Latest 18 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Installation of externally illuminated entrance canopy sign to sit on top of entrance canopy
15 Basil Street, London, SW3 1AP · premises record
Officer Saima Khanom
Advertisement consent
Approved
2025-01-17
Non-material amendment to planning permission 19/03197(Creation of stainless steel canopy over ground floor entrance and widening of entrance recess. Enlargement of 2no. bay windows to rear of property. Replacement of all other fenestration and addition of 1no. window to stairwell at 5th floor level. Replacement of mansard with synthetic tiles. Infilling of light well on Basil Street to create additional living space in basement apartment. Relocation of condenser units currently in light well, to rooftop plantroom. Enlargement of plant room by 1500mm) to ensure all approved project information is correctly co-ordinated.
15 Basil Street, London, SW3 1AX · premises record
Non-Material Amendments
Approved
2019-10-15
Creation of stainless steel canopy over ground floor entrance and widening of entrance recess. Enlargement of 2no. bay windows to rear of property. Replacement of all other fenestration and addition of 1no. window to stairwell at 5th floor level. Replacement of mansard with synthetic tiles. Infilling of light well on Basil Street to create additional living space in basement apartment. Relocation of condenser units currently in light well, to rooftop plantroom. Enlargement of plant room by 1500mm.
15 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2019-05-10
Installation of glazed entrance canopy and enlarged entry recess by demolishing side wall, reducing Housekeeping office and building external wall. Interior refurbishment of entrance lobby and installation of paneled entrance door
15 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2014-10-23
Remove and replace windows with double glazed and timber framed. Windows include weather seals and argon filled double glazed units.
Flat 7, Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2014-01-24
Confirmation that existing use within the property as 8 apartments (each only let for periods of less than 90 consecutive nights) is lawful (Certificate of Existing Use)
15 Basil Street, London, SW3 1AX · premises record
Certificates Lawful Existing Use or Dev.
Approved
2013-04-26
Replacement of external air-conditioning unit on roof terrace at fifth floor level.
Flat 34 And 35 Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2009-11-25
Installation of air conditioning condenser unit.
The Penthouse Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2009-02-16
Conversion of the infill extension at first, second and third floor level to a self contained one bedroom maisonette.
Jefferson House, 7-11 Basil Street, London, SW3 1AX · premises record
Planning Permission
Approved
2008-04-28
Change of use of first floor lightwell infill from residential to storage space.
7/11 Basil Street, London SW3 1AX · premises record
Planning Permission
Approved
2005-12-01
Installation of externally illuminated entrance canopy sign to sit on top of entrance canopy
15 Basil Street, London, SW3 1AP · premises record
Officer Saima Khanom
Approved
2025-01-17
More
Advertisement consent
Non-material amendment to planning permission 19/03197(Creation of stainless steel canopy over ground floor entrance and widening of entrance recess. Enlargement of 2no. bay windows to rear of property. Replacement of all other fenestration and addition of 1no. window to stairwell at 5th floor level. Replacement of mansard with synthetic tiles. Infilling of light well on Basil Street to create additional living space in basement apartment. Relocation of condenser units currently in light well, to rooftop plantroom. Enlargement of plant room by 1500mm) to ensure all approved project information is correctly co-ordinated.
15 Basil Street, London, SW3 1AX · premises record
Approved
2019-10-15
More
Non-Material Amendments
Creation of stainless steel canopy over ground floor entrance and widening of entrance recess. Enlargement of 2no. bay windows to rear of property. Replacement of all other fenestration and addition of 1no. window to stairwell at 5th floor level. Replacement of mansard with synthetic tiles. Infilling of light well on Basil Street to create additional living space in basement apartment. Relocation of condenser units currently in light well, to rooftop plantroom. Enlargement of plant room by 1500mm.
15 Basil Street, London, SW3 1AX · premises record
Approved
2019-05-10
More
Planning Permission
Show all 10 rows
Installation of glazed entrance canopy and enlarged entry recess by demolishing side wall, reducing Housekeeping office and building external wall. Interior refurbishment of entrance lobby and installation of paneled entrance door
15 Basil Street, London, SW3 1AX · premises record
Approved
2014-10-23
More
Planning Permission
Remove and replace windows with double glazed and timber framed. Windows include weather seals and argon filled double glazed units.
Flat 7, Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Approved
2014-01-24
More
Planning Permission
Confirmation that existing use within the property as 8 apartments (each only let for periods of less than 90 consecutive nights) is lawful (Certificate of Existing Use)
15 Basil Street, London, SW3 1AX · premises record
Approved
2013-04-26
More
Certificates Lawful Existing Use or Dev.
Replacement of external air-conditioning unit on roof terrace at fifth floor level.
Flat 34 And 35 Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Approved
2009-11-25
More
Planning Permission
Installation of air conditioning condenser unit.
The Penthouse Jefferson House, 11 Basil Street, London, SW3 1AX · premises record
Approved
2009-02-16
More
Planning Permission
Conversion of the infill extension at first, second and third floor level to a self contained one bedroom maisonette.
Jefferson House, 7-11 Basil Street, London, SW3 1AX · premises record
Approved
2008-04-28
More
Planning Permission
Change of use of first floor lightwell infill from residential to storage space.
7/11 Basil Street, London SW3 1AX · premises record
Approved
2005-12-01
More
Planning Permission
Building control
Building-control records are not yet collected for Kensington And Chelsea — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).
Place
What affects it?
Every mapped designation touching a premises in this postcode, with how many of its 50 premises each one covers.
Designation
Coverage
Conservation Area
Hans Town · reference 21 · covers 50 of 50 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Article 4 Direction Area
Article 4 - No 100 · reference 79 · covers 50 of 50 premises. Some normally permitted changes may require planning permission.
Tree Preservation Zone
Named designation not supplied · reference 21 · covers 50 of 50 premises. Protected-tree works may require consent or formal notice.
Conservation Area
Hans Town · reference 21 · covers 50 of 50 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Article 4 Direction Area
Article 4 - No 100 · reference 79 · covers 50 of 50 premises. Some normally permitted changes may require planning permission.
Tree Preservation Zone
Named designation not supplied · reference 21 · covers 50 of 50 premises. Protected-tree works may require consent or formal notice.
Nearby postcodes and streets
Walk to the next area — linked where the Atlas has a record for it (pilot borough only for now).
People
Who is involved?
Named on the latest 18 applications in this postcode — the party who applied, not the owner or occupier.
Development
What could it become?
Planning precedent18 applications and 18 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy33 EPC records; ratings C: 18, D: 15.
What is not assertedNo capacity, value or ownership claim is made at area level; those belong to individual premises records and their evidence.
Intent signals
Planning Atlas ProOwnership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
11 intent signals recorded in this postcode
Portfolio seller · Repeat sale · Price decline · Long hold · Ageing director
Subscribe to see the signals →Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.