Postcode record · Hounslow
W4 3LN.
W4 3LN has 38 known premises and 37 planning records — 21 approved of 23 decided (91.3%). 21 EPC records.
Postcode W4 3LN · boundary not held, centred on the postcodeApprovedRefusedOther36 exact36 on the map — every match
At a glance · this postcodeHounslow profile →
38
Premises
known addresses (UPRNs)
37
Applications
23 decided
91.3%
Approval rate
21 approved · 2 refused
21
EPC records
ratings C 3 · D 10 · E 6 · F 1 · G 1
36
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?
W4 3LN has 38 known premises and 37 planning records — 21 approved of 23 decided (91.3%). 21 EPC records.
Premises (18 of 38 shown)
Name
Details
UPRN 10091693870
UPRN 100021589038
UPRN 100021589040
UPRN 100021589042
UPRN 100021589043
UPRN 100021589044
UPRN 100021589045
UPRN 100021589046
UPRN 100021589047
UPRN 100021589048
UPRN 10091693870
UPRN 100021589038
UPRN 100021589040
Show all 10 rows
UPRN 100021589042
UPRN 100021589043
UPRN 100021589044
UPRN 100021589045
UPRN 100021589046
UPRN 100021589047
UPRN 100021589048
Planning
What happened?
37 planning applications across the postcode; 21 approved of 23 decided (91.3%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Certificate of lawfulness for the proposed erection of two rear roof extensions with Juliet balconies, four front roof windows to the house and removal of chimney.
37 St Marys Grove,Chiswick,London,W4 3LN · premises record
Applicant Mr and Mrs Turner · Officer Lucia Orsi
Lawful Development Certificate (Proposed)
Approved
2025-10-10
Certificate of Lawfulness for change of use from a House in Multiple Occupation (Class 4) to a house (Class C3a).
37 St Marys Grove,Chiswick,London,W4 3LN · premises record
Applicant Mr and Mrs Turner · Officer Daniel Hughes
Lawful Development Certificate (Proposed)
Approved
2025-10-02
Non material amendment to alter roof from a green to GRP roof in Dark Grey, change position of roof light and set in extension by 200mm from No.45 following planning permission 00988/47/P2 dated 15/09/2022 for erection of a single storey rear extension with a flat roof
47 ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Martin · Officer Louise Oppe
Non-Material Minor Amendment to an existing Planning Application
Approved
2023-06-05
Erection of a single storey rear extension with a flat roof
47 ST MARYS GROVE, CHISWICK, W4 3LN · premises record
Applicant Mr S Martin · Officer Louise Oppe
Householder Applications
Approved
2022-06-30
Erection of single storey rear extension.
33A ST MARYS GROVE, CHISWICK, W4 3LN · premises record
Applicant Tanya & Simon Dolan · Officer zzzJoyce Lo
PF-Full Applications
Approved
2021-01-18
Erection of a single storey rear extension to the ground floor
33C ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr Babak Paya · Officer zzzJoyce Lo
PF-Full Applications
Approved
2021-01-12
Installation of double glazed UPVC sash / casement windows to the front elevation and side elevation door to the flats
FLAT 1 TO 4 41 ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr Patrice Springer · Officer zzzTom.Bradfield
PF-Full Applications
Approved
2018-01-10
Erection of a single storey rear extension and a part first floor rear extension to the house
32 ST MARY'S GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr & Mrs Victoria & Nick Garland · Officer zzzJoney Ramirez
Householder Applications
Approved
2016-01-21
Certificate of lawfulness for the proposed erection of roof extension comprising of loft conversion with a dormer over the main roof and outrigger with two roof windows to the front slope, three roof windows to the roof top and a Juliet Balcony to the house
47 St Marys Grove, Chiswick, London, W4 3LN · premises record
Applicant Mr & Mrs Simon Martin · Officer zzzJames Hansel
Lawful Use Certificate
Not required
2016-01-05
Conversion and extension of the existing detached 4 bedroom two-storey (Plus basement) residential house into a pair of semi-detached 4 bedroom residential houses with extended basement and roof accomodation
42 ST MARY'S GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr David Ardley · Officer Sean Doran
PF-Full Applications
Withdrawn
2012-03-27
Certificate of lawfulness for the proposed erection of two rear roof extensions with Juliet balconies, four front roof windows to the house and removal of chimney.
37 St Marys Grove,Chiswick,London,W4 3LN · premises record
Applicant Mr and Mrs Turner · Officer Lucia Orsi
Approved
2025-10-10
More
Lawful Development Certificate (Proposed)
Certificate of Lawfulness for change of use from a House in Multiple Occupation (Class 4) to a house (Class C3a).
37 St Marys Grove,Chiswick,London,W4 3LN · premises record
Applicant Mr and Mrs Turner · Officer Daniel Hughes
Approved
2025-10-02
More
Lawful Development Certificate (Proposed)
Non material amendment to alter roof from a green to GRP roof in Dark Grey, change position of roof light and set in extension by 200mm from No.45 following planning permission 00988/47/P2 dated 15/09/2022 for erection of a single storey rear extension with a flat roof
47 ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Martin · Officer Louise Oppe
Approved
2023-06-05
More
Non-Material Minor Amendment to an existing Planning Application
Show all 10 rows
Erection of a single storey rear extension with a flat roof
47 ST MARYS GROVE, CHISWICK, W4 3LN · premises record
Applicant Mr S Martin · Officer Louise Oppe
Approved
2022-06-30
More
Householder Applications
Erection of single storey rear extension.
33A ST MARYS GROVE, CHISWICK, W4 3LN · premises record
Applicant Tanya & Simon Dolan · Officer zzzJoyce Lo
Approved
2021-01-18
More
PF-Full Applications
Erection of a single storey rear extension to the ground floor
33C ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr Babak Paya · Officer zzzJoyce Lo
Approved
2021-01-12
More
PF-Full Applications
Installation of double glazed UPVC sash / casement windows to the front elevation and side elevation door to the flats
FLAT 1 TO 4 41 ST MARYS GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr Patrice Springer · Officer zzzTom.Bradfield
Approved
2018-01-10
More
PF-Full Applications
Erection of a single storey rear extension and a part first floor rear extension to the house
32 ST MARY'S GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr & Mrs Victoria & Nick Garland · Officer zzzJoney Ramirez
Approved
2016-01-21
More
Householder Applications
Certificate of lawfulness for the proposed erection of roof extension comprising of loft conversion with a dormer over the main roof and outrigger with two roof windows to the front slope, three roof windows to the roof top and a Juliet Balcony to the house
47 St Marys Grove, Chiswick, London, W4 3LN · premises record
Applicant Mr & Mrs Simon Martin · Officer zzzJames Hansel
Not required
2016-01-05
More
Lawful Use Certificate
Conversion and extension of the existing detached 4 bedroom two-storey (Plus basement) residential house into a pair of semi-detached 4 bedroom residential houses with extended basement and roof accomodation
42 ST MARY'S GROVE, CHISWICK, LONDON, W4 3LN · premises record
Applicant Mr David Ardley · Officer Sean Doran
Withdrawn
2012-03-27
More
PF-Full Applications
Building control
Building-control records are not yet collected for Hounslow — 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 38 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction · reference A4D.2 · covers 38 of 38 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction · reference A4D.2 · covers 38 of 38 premises. Some normally permitted changes may require planning permission.
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 30 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Applicant on 2 applications
Applicant on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 2 applications
Applicant on 2 applications
Applicant on 2 applications
Show all 10 rows
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Development
What could it become?
Planning precedent37 applications and 36 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy21 EPC records; ratings C: 3, D: 10, E: 6, F: 1, G: 1.
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.
8 intent signals recorded in this postcode
EPC F/G · Repeat sale · Long hold · Ageing director
Subscribe to see the signals →Thinking about a project here?
Boundary: OS Postcode Unit areas (Ordnance Survey), 2026-08-14. Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.