Planning application
101 Gonville Crescent Northolt UB5 4SJ
Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.
Proposal
Change of use of the existing private garden gym/outbuilding incidental to the main dwellinghouse into ancillary habitable accommodation (granny annexe) for use in connection with the main dwellinghouse (Use Class C3) (Retrospective Application)
As published by the council, reference 262081HH
Application record
- Reference
- 262081HH
- Type
- Householder
- Status
- Refused
- Decision
- Refused
- Received
- 20 May 2026
- Validated
- 20 May 2026
- Decided
- 18 Aug 2026
- Ward
- Northolt Mandeville
- Decision by
- Delegated Decision
- Postcode
- UB5 4SJ
Timeline
Dates from the published record
-
20 May 2026
Received by Old Oak and Park Royal Development Corporation
-
27 Jul 2026
Added to PlanIndex
-
10 Aug 2026
Status changed to Awaiting decision
Previously Pending Consideration.
-
18 Aug 2026
Decision issued: Refused
Who's behind it
Company information only, from the register and Companies House
March In Design Agent, a design practice
13 applications on PlanIndex · across 6 councils · 69% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
11 documents on file for this application
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Open the documentsWhat this refusal means
Old Oak and Park Royal Development Corporation refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.
About householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 500 metres
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2 Gonville Crescent Northolt UB5 4SJ
Single storey (max. 6.0m deep and 3.40m high) side/rear extension (42 Days Prior Approval Notification Process).
Granted Prior approval Extension 6 docsSmall domestic -
2 Gonville Crescent Northolt UB5 4SJ
Single storey (Max 6m deep and Max 3.40m high) rear extension (42 days Prior Notification Process)
Refused Prior approval Extension 7 docsSmall domestic -
2 Gonville Crescent Northolt UB5 4SJ
Alteration of roof from hip to gable end; rear roof extension and installation of three roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
Granted Lawful development Extension Loft or dormer 6 docs -
65 Gonville Crescent Northolt UB5 4SJ
Front porch extension (following demolition of existing front porch); alteration of roof from hip to gable end; rear roof extension incorporating Juliet balcony; installation of two rooflights to front roofslope (Lawful Development Certificate for a Proposed Development)
Granted Lawful development Extension Loft or dormer +1 9 docsSmall domestic -
65 Gonville Crescent Northolt UB5 4SJ
Single storey rear extension (max 5.7m deep and max 4m high) (following demolition of rear extension) (42 Days Prior Approval Notification Process)
Granted Prior approval Extension Demolition 8 docsSmall domestic -
101 Gonville Crescent Northolt UB5 4SJ
Change of use of the existing private garden gym/outbuilding incidental to the main dwellinghouse into ancillary habitable accommodation (granny annexe) for use in connection with the main dwellinghouse (Use Class C3) (Retrospective Application)
Refused Householder 11 docsSmall domestic
Other householder applications
In Old Oak and Park Royal Development Corporation
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262218HH Granted
67 Woodfield Road Ealing W5 1SR
Rear roof extension; installation of a rooflight on the rear roof slope; and associated internal and external alterations
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261961HH Granted
28 Ludlow Road Ealing W5 1NY
Replacement of existing single glazed windows and doors with double glazed and internal amendments
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261866HH Granted
33 Carlton Road Chiswick W4 5DY
Single-storey side and rear extension; extension to the rear roof to form a second floor above the existing outrigger (including the construction of a new wall along the side elevation to support the structure); installation of one rooflight within the existing rear roof dormer; alterations to fenestration involving the replacement of an existing rear window with a door; and Formation of a new window and door opening associated with a porch canopy in the side elevation at ground-floor level.
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262779HH Refused
14 Summit Road Northolt UB5 5HJ
Two storey side extension; part single, part two storey rear extension (following demolition of existing single-storey rear extension); alteration of roof from hip to gable end; rear roof extension incorporating a Juliet balcony and installation of three rooflights to front roofslope
-
262778HH Refused
406 Lady Margaret Road Southall UB1 2NL
Part single, part two-storey side/rear extension (following demolition of existing single-storey side extension); front porch extension (following demolition of existing front porch); alteration of roof from hip to gable end; rear roof extension, and installation of two rooflights to front roofslope