Planning application
316-318 HIGH STREET HARLINGTON UB3 5DU
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Single storey rear infill extension, first floor rear extension, rear dormer, front roof lights, amendments to rear fenestrations, and removal of rear external staircase.
As published by the council, reference 42416/APP/2025/3223
Application record
- Reference
- 42416/APP/2025/3223
- Type
- Full
- Status
- Approval
- Decision
- Permitted
- Received
- 19 Dec 2025
- Validated
- 31 Dec 2025
- Decided
- 7 Jul 2026
- Ward
- HEATHROW VILLAGES
- Postcode
- UB3 5DU
Site history
Applications at this address on the Hillingdon register
This site has had 2 applications since 2025: 2 approved, 0 refused.
-
42416/APP/2026/17 Granted
316-318 HIGH STREET HARLINGTON UB3 5DU
The continued use of the property as a 6-bedroom C4 HMO for up to 6 persons (Application for a Certificate of Lawful Development for an Existing Use).
Timeline
Dates from the published record
-
19 Dec 2025
Received by Hillingdon
-
31 Dec 2025
Validated
Checked as complete and ready for consideration.
-
7 Jul 2026
Decision issued: Permitted
-
26 Jul 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
12 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat this grant of permission means
Hillingdon granted permission on 7 July 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
316-318 HIGH STREET HARLINGTON UB3 5DU
The continued use of the property as a 6-bedroom C4 HMO for up to 6 persons (Application for a Certificate of Lawful Development for an Existing Use).
Granted Full applications 10 docs -
393 HIGH STREET HARLINGTON UB3 5DH
87% historically approved · decision due ~12 Mar
Subdivision of The Dower House to provide 3 residential homes (Use Class C3) along with restorative works. Partial demolition of the forecourt wall to The Dower House to enable rear site access. Erection of 18 residential homes (Use Class C3) at the rear of the site. Associated landscaping works.
Awaiting decision Full applications Demolition 90 docs -
34-36 WEST END LANE HARLINGTON UB3 5LT
Erection of a single-storey rear extension to ground floor flat and rear dormer extension with front roof lights for upper flat
Refused Full applications Extension Loft or dormer 4 docsSmall domestic -
3 THE CRESCENT HARLINGTON MIDDLESEX UB3 5NA
Formation of vehicle crossover, installation of a dropped kerb and associated alterations.
Granted Full applications 8 docs -
Vacant Plot CRANFORD LANE HARLINGTON UB3 5DG
Erection of 2 x 3-bedroom, two storey semi-detached dwellings with alterations to existing crossover, installation of new crossover, landscaping and bike store.
Refused Full applications 16 docs -
214 HIGH STREET HARLINGTON UB3 5DS
Installation of replacement shopfront, and an externally illuminated fascia sign (Part-Retrospective Planning application)
Granted Full applications Windows or glazing 11 docs
Other full applications
In Hillingdon
-
80210/APP/2026/1925 Granted
33 FLEMMING AVENUE RUISLIP HA4 9LE
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 3.30 metres, and for which the height of the eaves would be 3.00 metres.
-
79068/APP/2026/1422 Granted
2 COLLEGE DRIVE RUISLIP HA4 8SB
Variation of Condition 2 (Approved Plans), 3 (Materials) of planning permission ref. 79068/APP/2024/2610, dated 10-02-25 (Erection of a single storey extension to the side, erection of a single storey extension to the rear, following the demolition of existing single storey side extension and garage. Installation of 4 front roof lights and amendments to fenestrations including removal of pebble dash and the installation of an Air Source Heat Pump.) to be amended in accordance with drawing numbers C01,C02,C03 & C04 with amendment of the rear element and Condition 3 to be amended so that the front extension elevation remains brick, with the side and rear elevations to be silicone render with stipple finish to match existing traditional render.
-
78325/APP/2026/1804 Granted
1 COPSE CLOSE NORTHWOOD HA6 2XG
Details pursuant to the discharge of Condition 10 (Accessible Housing) of planning permission ref. 78325/APP/2023/2889, dated 19-01-2024 (Erection of a two storey detached dwelling with associated access, parking and amenity space following demolition of existing dwelling.)
-
79711/APP/2026/1801 Granted
132 WHITETHORN AVENUE YIEWSLEY UB7 8LB
Change of use from ground floor office to annex
-
4260/APP/2025/2721 Granted
RUISLIP METHODIST CHURCH ICKENHAM ROAD RUISLIP MIDDLESEX. HA7 7BZ
Amendments to fenestration to include replacement windows on the front elevation and the insertion of a new fire door on the east side elevation.