Planning application
101 GROSVENOR CRESCENT HILLINGDON
Works: 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 to habitable space including a rear dormer.
As published by the council, reference 8571/APP/2026/856
Application record
- Reference
- 8571/APP/2026/856
- Status
- Undecided
- Received
- 2 Apr 2026
- Validated
- 16 Apr 2026
Site history
Applications at this address on the Hillingdon register
This site has had 4 applications since 2025: 1 approved, 2 refused.
-
8571/APP/2026/1584 Refused
101 GROSVENOR CRESCENT HILLINGDON
Erection of part double storey, part single storey side/ rear extension
-
8571/APP/2026/1299 Refused
101 GROSVENOR CRESCENT HILLINGDON
Conversion of roof space to habitable use to include a rear dormer, 3 x front roof lights, conversion of roof from hip to gable end, following the partial demolition of existing roof
-
8571/APP/2025/2221 Granted
101 GROSVENOR CRESCENT HILLINGDON
Erection of a single storey rear extension, and conversion of garage including replacement of garage door with window.
Timeline
Dates from the published record
-
2 Apr 2026
Received by Hillingdon
-
16 Apr 2026
Validated
Checked as complete and ready for consideration.
-
26 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 11 June 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Hillingdon took a median of 57 days over the applications it decided in the last year.
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.