Postcode record · Hounslow
W4 1PN.
W4 1PN has 37 known premises and 31 planning records — 15 approved of 19 decided (78.9%). 16 EPC records.
Postcode W4 1PN · boundary not held, centred on the postcodeApprovedRefusedOther31 exact1 approximate32 on the map — every match
At a glance · this postcodeHounslow profile →
37
Premises
known addresses (UPRNs)
31
Applications
19 decided
78.9%
Approval rate
15 approved · 4 refused
16
EPC records
ratings D 6 · E 8 · F 1 · G 1
32
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 1PN has 37 known premises and 31 planning records — 15 approved of 19 decided (78.9%). 16 EPC records.
Premises (18 of 37 shown)
Name
Details
UPRN 10091692142
UPRN 10093261235
UPRN 100021587094
UPRN 100021587097
UPRN 100021587114
UPRN 100023489759
UPRN 200002818861
UPRN 200002818862
UPRN 200002818863
UPRN 200002818864
UPRN 10091692142
UPRN 10093261235
UPRN 100021587094
Show all 10 rows
UPRN 100021587097
UPRN 100021587114
UPRN 100023489759
UPRN 200002818861
UPRN 200002818862
UPRN 200002818863
UPRN 200002818864
Planning
What happened?
31 planning applications across the postcode; 15 approved of 19 decided (78.9%). Latest 30 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Certificate of lawfulness for the proposed erection of a rear roof extension and a part second floor rear outrigger extension
31 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr Geoffrey Gay · Officer Louise Oppe
Lawful Use Certificate
Not required
2024-02-14
Erection of a single storey side and rear wrap around extension
FLAT GROUND FLOOR 31 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr Gay · Officer Louise Oppe
PF-Full Applications
Approved
2023-03-17
Conversion of two flats into one single family house.
31 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr Gay · Officer Louise Oppe
PF-Full Applications
Approved
2022-12-16
Works to a tree within a conservation area - Mimosa (T1) to reduce all aspects of the crown by approx. 2.5 - 3 metres
21 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Harman · Officer Technical Support Officer
Works to Trees in Conservation Area
No determination
2021-10-15
Certificate of lawfulness for existing use of the rear flat roof as a terrace.
FIRST FLOOR FLAT 33 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
Lawful Use Certificate
Not required
2021-08-10
Erection of rear roof extension with one front roof window to the upper floor flat
33 MAYFIELD AVENUE, CHISWICK, LONDON · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
PF-Full Applications
Refused
2020-11-04
Certificate of lawfulness for existing use of the rear flat roof as a terrace.
FIRST FLOOR FLAT 33 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
Lawful Use Certificate
Not required
2020-08-18
Demolition of existing rear shed, erection of a rear outbuilding with associated raised decking and re-landscaping of the rear garden.
27 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr & Mrs Bullock · Officer Daniel Hughes
Householder Applications
Approved
2020-06-29
Non material amendment for simplification of doors to rear elevation, installation of glass screen and rooflight and addition of one window and minor amendment to the door of planning permission 00749/23/P3 approved on 15/11/2018
23 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr R Masson-Taylor · Officer zzzMatthew Lambert
Non-Material Minor Amendment to an existing Planning Application
Approved
2019-06-18
Variation of condition 3 (approved plans) to be changed to reflect altered design (alterations to roof profiles and boundary) with different drawing numbers of planning permission 00794/23/P3 dated 15/11/2018 for erection of first and second floor part rear extensions, a single storey rear extension, extension to existing basement and re-positioning of rear roof extension
23 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr R Masson-Taylor · Officer zzzMatthew Lambert
PF-Full Applications
Approved
2019-06-18
Certificate of lawfulness for the proposed erection of a rear roof extension and a part second floor rear outrigger extension
31 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr Geoffrey Gay · Officer Louise Oppe
Not required
2024-02-14
More
Lawful Use Certificate
Erection of a single storey side and rear wrap around extension
FLAT GROUND FLOOR 31 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr Gay · Officer Louise Oppe
Approved
2023-03-17
More
PF-Full Applications
Conversion of two flats into one single family house.
31 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr Gay · Officer Louise Oppe
Approved
2022-12-16
More
PF-Full Applications
Show all 10 rows
Works to a tree within a conservation area - Mimosa (T1) to reduce all aspects of the crown by approx. 2.5 - 3 metres
21 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Harman · Officer Technical Support Officer
No determination
2021-10-15
More
Works to Trees in Conservation Area
Certificate of lawfulness for existing use of the rear flat roof as a terrace.
FIRST FLOOR FLAT 33 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
Not required
2021-08-10
More
Lawful Use Certificate
Erection of rear roof extension with one front roof window to the upper floor flat
33 MAYFIELD AVENUE, CHISWICK, LONDON · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
Refused
2020-11-04
More
PF-Full Applications
Certificate of lawfulness for existing use of the rear flat roof as a terrace.
FIRST FLOOR FLAT 33 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr John Chapman · Officer zzzJack Meacher
Not required
2020-08-18
More
Lawful Use Certificate
Demolition of existing rear shed, erection of a rear outbuilding with associated raised decking and re-landscaping of the rear garden.
27 MAYFIELD AVENUE, CHISWICK, W4 1PN · premises record
Applicant Mr & Mrs Bullock · Officer Daniel Hughes
Approved
2020-06-29
More
Householder Applications
Non material amendment for simplification of doors to rear elevation, installation of glass screen and rooflight and addition of one window and minor amendment to the door of planning permission 00749/23/P3 approved on 15/11/2018
23 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr R Masson-Taylor · Officer zzzMatthew Lambert
Approved
2019-06-18
More
Non-Material Minor Amendment to an existing Planning Application
Variation of condition 3 (approved plans) to be changed to reflect altered design (alterations to roof profiles and boundary) with different drawing numbers of planning permission 00794/23/P3 dated 15/11/2018 for erection of first and second floor part rear extensions, a single storey rear extension, extension to existing basement and re-positioning of rear roof extension
23 MAYFIELD AVENUE, CHISWICK, LONDON, W4 1PN · premises record
Applicant Mr R Masson-Taylor · Officer zzzMatthew Lambert
Approved
2019-06-18
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 37 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 37 of 37 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 37 of 37 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 3 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 3 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 precedent31 applications and 32 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy16 EPC records; ratings D: 6, E: 8, 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
The Developer PlanOwnership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.
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.