Postcode record · Hillingdon
HA4 6HS.
HA4 6HS has 16 known premises and 15 planning records — 13 approved of 14 decided (92.9%). 11 EPC records.
Postcode HA4 6HS · boundary not held, centred on the postcodeApprovedRefusedOther15 exact15 on the map — every match
At a glance · this postcodeHillingdon profile →
16
Premises
known addresses (UPRNs)
15
Applications
14 decided
92.9%
Approval rate
13 approved · 1 refused
11
EPC records
ratings D 8 · E 2 · G 1
15
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 6HS has 16 known premises and 15 planning records — 13 approved of 14 decided (92.9%). 11 EPC records.
Premises
Name
Details
UPRN 10015439983
UPRN 100021461824
UPRN 100021461825
UPRN 100021461826
UPRN 100021461827
UPRN 100021461829
UPRN 100021461831
UPRN 100021461833
UPRN 100021461835
UPRN 100021461837
UPRN 10015439983
UPRN 100021461824
UPRN 100021461825
Show all 10 rows
UPRN 100021461826
UPRN 100021461827
UPRN 100021461829
UPRN 100021461831
UPRN 100021461833
UPRN 100021461835
UPRN 100021461837
Planning
What happened?
15 planning applications across the postcode; 13 approved of 14 decided (92.9%). Latest 15 shown.
Reference
Proposal · address
Type
Outcome
Date · distance
Conversion of roof space to habitable use to include a rear dormer, conversion of roof from hip to gable end, erection of a single storey extension to the rear (retrospective application)
149 HERLWYN AVENUE RUISLIP · premises record
Agent Mr David Eagle · Officer Sharon Singh
Planning Application
Approved
2026-03-30
Removal of the original kitchen half-width outrigger, and replacement with a single storey rear extension, revision to the side access door
147 HERLWYN AVENUE RUISLIP · premises record
Agent Mr Michael Oakes · Officer Sharon Singh
Planning Application
Approved
2026-03-20
Conversion of roof space to habitable use to include hip to gable extension, rear dormer, 4 x front roof lights. Erection of an outbuilding (Application for a Certificate of Lawful Development for a Proposed Development)
147 HERLWYN AVENUE RUISLIP · premises record
Agent Mr Michael Oakes · Officer Sharon Singh
Planning Application
Approved
2026-03-19
Erection of rear extension, hip-to-gable roof conversion and rear dormer, and conversion of property from Class C3 (dwellinghouse) to Class C4 (small HMO) for up to 6 persons (Part retrospective application).
149 HERLWYN AVENUE RUISLIP · premises record
Agent Mr David Eagle · Officer Christopher Lamb
Planning Application
Refused
2025-12-23
Erection of a single storey rear extension
145 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Lee Richardson · Officer Katherine Mills
Planning Application
Approved
2025-05-08
Conversion of roof space to habitable use to include a rear dormer, 3 front roof lights and conversion of roof from hip to gable end (Application for a Certificate of Lawful Development for a Proposed Development).
145 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Lee Richardson · Officer Katherine Mills
Planning Application
Approved
2025-05-01
Erection of a single storey rear extension.
149 HERLWYN AVENUE RUISLIP · premises record
Agent Miss Merve Gulener · Officer Becky Smith
Planning Application
Approved
2024-07-05
Erection of a single storey rear extension following the demolition of existing garage and outrigger extension with amendments to fenestration
147 HERLWYN AVENUE RUISLIP · premises record
Planning Application
Approved
2023-03-28
Conversion of roof space to habitable use to include a rear dormer, 3 front roof lights and conversion of roof from hip to gable end. Erection of outbuilding to rear garden (Application for a Certificate of Lawful Development for a Proposed Development)
147 HERLWYN AVENUE RUISLIP · premises record
Planning Application
Approved
2023-03-27
Conversion of roofspace to habitable use to include a rear dormer, 3 front rooflights and conversion of roof from hip to gable end with a new gable end window (Application for a Certificate of Lawful Development for a Proposed Development)
143 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Mr Tony Nimmo I D R SERVICES · Officer Cris Lancaster
Planning Application
Approved
2017-12-11
Conversion of roof space to habitable use to include a rear dormer, conversion of roof from hip to gable end, erection of a single storey extension to the rear (retrospective application)
149 HERLWYN AVENUE RUISLIP · premises record
Agent Mr David Eagle · Officer Sharon Singh
Approved
2026-03-30
More
Planning Application
Removal of the original kitchen half-width outrigger, and replacement with a single storey rear extension, revision to the side access door
147 HERLWYN AVENUE RUISLIP · premises record
Agent Mr Michael Oakes · Officer Sharon Singh
Approved
2026-03-20
More
Planning Application
Conversion of roof space to habitable use to include hip to gable extension, rear dormer, 4 x front roof lights. Erection of an outbuilding (Application for a Certificate of Lawful Development for a Proposed Development)
147 HERLWYN AVENUE RUISLIP · premises record
Agent Mr Michael Oakes · Officer Sharon Singh
Approved
2026-03-19
More
Planning Application
Show all 10 rows
Erection of rear extension, hip-to-gable roof conversion and rear dormer, and conversion of property from Class C3 (dwellinghouse) to Class C4 (small HMO) for up to 6 persons (Part retrospective application).
149 HERLWYN AVENUE RUISLIP · premises record
Agent Mr David Eagle · Officer Christopher Lamb
Refused
2025-12-23
More
Planning Application
Erection of a single storey rear extension
145 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Lee Richardson · Officer Katherine Mills
Approved
2025-05-08
More
Planning Application
Conversion of roof space to habitable use to include a rear dormer, 3 front roof lights and conversion of roof from hip to gable end (Application for a Certificate of Lawful Development for a Proposed Development).
145 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Lee Richardson · Officer Katherine Mills
Approved
2025-05-01
More
Planning Application
Erection of a single storey rear extension.
149 HERLWYN AVENUE RUISLIP · premises record
Agent Miss Merve Gulener · Officer Becky Smith
Approved
2024-07-05
More
Planning Application
Erection of a single storey rear extension following the demolition of existing garage and outrigger extension with amendments to fenestration
147 HERLWYN AVENUE RUISLIP · premises record
Approved
2023-03-28
More
Planning Application
Conversion of roof space to habitable use to include a rear dormer, 3 front roof lights and conversion of roof from hip to gable end. Erection of outbuilding to rear garden (Application for a Certificate of Lawful Development for a Proposed Development)
147 HERLWYN AVENUE RUISLIP · premises record
Approved
2023-03-27
More
Planning Application
Conversion of roofspace to habitable use to include a rear dormer, 3 front rooflights and conversion of roof from hip to gable end with a new gable end window (Application for a Certificate of Lawful Development for a Proposed Development)
143 HERLWYN AVENUE RUISLIP HA4 6HS · premises record
Agent Mr Tony Nimmo I D R SERVICES · Officer Cris Lancaster
Approved
2017-12-11
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 16 premises each one covers.
Designation
Coverage
Article 4 Direction Area
Residential extensions · reference A8177 · covers 16 of 16 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Residential extensions · reference A8177 · covers 16 of 16 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 15 applications in this postcode — the party who applied, not the owner or occupier.
Name
Details
Agent on 2 applications
Agent on 2 applications
Agent on 2 applications
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 2 applications
Agent on 2 applications
Agent on 2 applications
Show all 10 rows
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Agent on 1 application
Development
What could it become?
Planning precedent15 applications and 15 mapped decisions in this postcode — precedent for what has been permitted and refused here.
Energy11 EPC records; ratings D: 8, E: 2, 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.
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.