Postcode record · Hillingdon
HA4 0AX.
HA4 0AX has 33 known premises and 21 planning records — 19 approved of 20 decided (95%). 16 EPC records.
Postcode HA4 0AX · boundary not held, centred on the postcodeApprovedRefusedOther21 on the map — every match
At a glance · this postcodeHillingdon profile →
33
Premises
known addresses (UPRNs)
21
Applications
20 decided
95%
Approval rate
19 approved · 1 refused
16
EPC records
ratings C 2 · D 9 · E 4 · G 1
21
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?
HA4 0AX has 33 known premises and 21 planning records — 19 approved of 20 decided (95%). 16 EPC records.
Premises (18 of 33 shown)
Name
Details
UPRN 768010860
UPRN 768011118
UPRN 100021467559
UPRN 100021467561
UPRN 100021467563
UPRN 100021467565
UPRN 100021467568
UPRN 100021467570
UPRN 100021467572
UPRN 100021467574
UPRN 768010860
UPRN 768011118
UPRN 100021467559
Show all 10 rows
UPRN 100021467561
UPRN 100021467563
UPRN 100021467565
UPRN 100021467568
UPRN 100021467570
UPRN 100021467572
UPRN 100021467574
Planning
What happened?
21 planning applications across the postcode; 19 approved of 20 decided (95%). Latest 21 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Erection of a part single storey, part two storey rear extension, two storey side extension, a front porch, front roof lights, and the installation of 2x side-facing windows (Part-Retrospective Application)
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Planning Application
Approved
2026-03-03
Erection of a part single storey, part double storey side and rear extension to incorporate part of the existing garage (involving conversion into habitable use). Conversion of roof space to habitable use to include a rear dormer with Juliette balcony and erection of a front porch.
22 SEATON GARDENS RUISLIP · premises record
Officer Katherine Mills
Planning Application
Approved
2025-01-03
Conversion of roof space to habitable use to include a rear dormer with Juliette balcony and conversion of roof from hip to gable end. The erection of an outbuilding to the rear garden. (Application for a Certificate of Lawful Development for a Proposed Development)
22 SEATON GARDENS RUISLIP · premises record
Officer Katherine Mills
Planning Application
Approved
2024-11-12
Erection of a part two storey, part single storey rear extension. Conversion of roof space to habitable use to include 2no. front roof lights, a side dormer and a rear dormer with a Juliette balcony and the installation of 5 new side facing windows
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Planning Application
Refused
2024-05-29
Conversion of roof space to habitable use to include a rear dormer with juliette balcony, 2 front roof lights and conversion of roof from hip to gable end with new gable end window. Erection of outbuilding to rear.(Application for a Certificate of Lawful Development for a Proposed Development
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Nicola Taplin
Planning Application
Approved
2024-03-18
Erection of single storey rear extension
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Planning Application
Withdrawn
2024-03-18
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00 metres, for which the maximum height would be 3.00 metres, and for which the height of the eaves would be 3.00 metres
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Planning Application
Approved
2024-03-15
Erection of a part single storey, part two storey rear extension. Two storey side extension. Conversion of roof space to habitable use to include 1no. rear dormer and 2no. front roof lights.
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Eoin Concannon
Planning Application
Approved
2024-03-15
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4 metres, for which the maximum height would be 3 metres, and for which the height of the eaves would be 3 metres
36 SEATON GARDENS RUISLIP · premises record
Officer Kelly Sweeney
Planning Application
Approved
2021-03-29
Single storey rear extension, porch to front and conversion of roof space to habitable use to include a rear dormer with Juliette balcony and 3 front rooflights (Application for a Certificate of Lawful Development for a Proposed Development)
36 SEATON GARDENS RUISLIP · premises record
Officer Kelly Sweeney
Planning Application
Approved
2021-03-29
Erection of a part single storey, part two storey rear extension, two storey side extension, a front porch, front roof lights, and the installation of 2x side-facing windows (Part-Retrospective Application)
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Approved
2026-03-03
More
Planning Application
Erection of a part single storey, part double storey side and rear extension to incorporate part of the existing garage (involving conversion into habitable use). Conversion of roof space to habitable use to include a rear dormer with Juliette balcony and erection of a front porch.
22 SEATON GARDENS RUISLIP · premises record
Officer Katherine Mills
Approved
2025-01-03
More
Planning Application
Conversion of roof space to habitable use to include a rear dormer with Juliette balcony and conversion of roof from hip to gable end. The erection of an outbuilding to the rear garden. (Application for a Certificate of Lawful Development for a Proposed Development)
22 SEATON GARDENS RUISLIP · premises record
Officer Katherine Mills
Approved
2024-11-12
More
Planning Application
Show all 10 rows
Erection of a part two storey, part single storey rear extension. Conversion of roof space to habitable use to include 2no. front roof lights, a side dormer and a rear dormer with a Juliette balcony and the installation of 5 new side facing windows
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Refused
2024-05-29
More
Planning Application
Conversion of roof space to habitable use to include a rear dormer with juliette balcony, 2 front roof lights and conversion of roof from hip to gable end with new gable end window. Erection of outbuilding to rear.(Application for a Certificate of Lawful Development for a Proposed Development
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Nicola Taplin
Approved
2024-03-18
More
Planning Application
Erection of single storey rear extension
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Withdrawn
2024-03-18
More
Planning Application
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00 metres, for which the maximum height would be 3.00 metres, and for which the height of the eaves would be 3.00 metres
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Samuel Patten
Approved
2024-03-15
More
Planning Application
Erection of a part single storey, part two storey rear extension. Two storey side extension. Conversion of roof space to habitable use to include 1no. rear dormer and 2no. front roof lights.
20 SEATON GARDENS RUISLIP HA4 0AX · premises record
Officer Eoin Concannon
Approved
2024-03-15
More
Planning Application
Erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4 metres, for which the maximum height would be 3 metres, and for which the height of the eaves would be 3 metres
36 SEATON GARDENS RUISLIP · premises record
Officer Kelly Sweeney
Approved
2021-03-29
More
Planning Application
Single storey rear extension, porch to front and conversion of roof space to habitable use to include a rear dormer with Juliette balcony and 3 front rooflights (Application for a Certificate of Lawful Development for a Proposed Development)
36 SEATON GARDENS RUISLIP · premises record
Officer Kelly Sweeney
Approved
2021-03-29
More
Planning Application
Building control
Building-control records are not yet collected for Hillingdon — 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 33 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Residential extensions · reference A8177 · covers 33 of 33 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Residential extensions · reference A8177 · covers 33 of 33 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 21 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Case officer on 4 applications
Case officer on 2 applications
Case officer on 2 applications
Case officer on 2 applications
Case officer on 2 applications
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 4 applications
Case officer on 2 applications
Case officer on 2 applications
Show all 10 rows
Case officer on 2 applications
Case officer on 2 applications
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Case officer on 1 application
Development
What could it become?
Planning precedent21 applications and 21 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy16 EPC records; ratings C: 2, D: 9, E: 4, 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.
7 intent signals recorded in this postcode
EPC F/G · Repeat sale · Long hold
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.