Planning application
147 HERLWYN AVENUE RUISLIP
Works: Extension Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
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)
As published by the council, reference 31120/APP/2026/720
Application record
- Reference
- 31120/APP/2026/720
- Status
- Approval
- Received
- 19 Mar 2026
- Validated
- 20 Mar 2026
- Decided
- 14 May 2026
Site history
Applications at this address on the Hillingdon register
This site has had 4 applications since 2023: 2 approved, 0 refused.
-
31120/APP/2026/723 Awaiting decision
147 HERLWYN AVENUE RUISLIP
Removal of the original kitchen half-width outrigger, and replacement with a single storey rear extension, revision to the side access door
-
31120/APP/2023/919 Granted
147 HERLWYN AVENUE RUISLIP
Erection of a single storey rear extension following the demolition of existing garage and outrigger extension with amendments to fenestration
-
31120/APP/2023/913 Granted
147 HERLWYN AVENUE RUISLIP
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)
Timeline
Dates from the published record
-
19 Mar 2026
Received by Hillingdon
-
20 Mar 2026
Validated
Checked as complete and ready for consideration.
-
14 May 2026
Decision issued
-
7 Aug 2026
Added to PlanIndex
What happens while it is decided
This application is with Hillingdon for determination, against a statutory target of eight weeks. Over the last year Hillingdon's median decision took 57 days. More in our guide to how long planning decisions take.
About this record
The published feed does not state which type of application this is; the register entry on Hillingdon's portal will say. Our guide explains the common types.