Planning application
Spencer House 9 - 11 Belsize Park Gardens London NW3 4JR
Works: New dwelling
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Use of the 17 individual self-contained flats across the five floors as private residential units (Class C3).
As published by the council, reference 2025/5123/P
Application record
- Reference
- 2025/5123/P
- Type
- Certificate of Lawfulness (Existing)
- Status
- Final Decision
- Decision
- Granted
- Received
- 12 Nov 2025
- Validated
- 18 Nov 2025
- Decided
- 20 Jan 2026
- Ward
- Belsize
- Decision by
- Delegated
- Postcode
- NW3 4JR
Site history
Applications at this address on the Camden register
This site has had 6 applications since 2019: 5 approved, 0 refused.
-
2026/3168/P Awaiting decision
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Creation of balconies at first floor level above front entrance porticos, including the installation of metal railings and french doors.
-
2026/1263/P Granted
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Extension to rear of property at lower ground floor level, including associated lowering of rear section of lower ground floor level, alterations to fenestration, formation of balconies at ground and first floor level to rear, and alterations to front lightwell.
-
2026/1259/P Granted
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Alterations and extensions to roof to form front, side and rear dormers, with front and rear balconies.
-
2026/0261/P Granted
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Internal works involving the reconfiguration of the existing 17 flats and the reduction to 16 x self-contained residential units (Class C3).
-
2019/2554/T Granted
Spencer House 9 - 11 Belsize Park Gardens London NW3 4JR
DD 5 Day Notice REAR GARDEN: 1 x Cherry - Fell to ground level and grinf stump.
Timeline
Dates from the published record
-
12 Nov 2025
Received by Camden
-
18 Nov 2025
Validated
Checked as complete and ready for consideration.
-
20 Jan 2026
Decision issued: Granted
-
9 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
16 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
Camden granted permission on 20 January 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 lawful development applications
A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Extension to rear of property at lower ground floor level, including associated lowering of rear section of lower ground floor level, alterations to fenestration, formation of balconies at ground and first floor level to rear, and alterations to front lightwell.
Granted Full applications Extension Windows or glazing 68 docs -
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Alterations and extensions to roof to form front, side and rear dormers, with front and rear balconies.
Granted Full applications Extension Loft or dormer 28 docs -
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
91% historically approved · decision due ~30 Sep
Creation of balconies at first floor level above front entrance porticos, including the installation of metal railings and french doors.
Awaiting decision Full applications Windows or glazing 15 docs -
Spencer House 9-11 Belsize Park Gardens London NW3 4JR
Internal works involving the reconfiguration of the existing 17 flats and the reduction to 16 x self-contained residential units (Class C3).
Granted Lawful development New dwelling 16 docsMajor scheme -
Spencer House 9 - 11 Belsize Park Gardens London NW3 4JR
DD 5 Day Notice REAR GARDEN: 1 x Cherry - Fell to ground level and grinf stump.
Granted Trees 3 docs -
Flat 2 13 Belsize Park Gardens London NW3 4JG
REAR GARDEN: 1 x Tilia SP (Lime) - Remove Ivy from tree, Crown reduce to previous reduction points 25-30%
Granted Trees
Other lawful development applications
In Camden
-
2026/3669/P Awaiting decision
64 Westcroft Close London NW2 2RR
Demolition of existing conservatory and erection of a single storey rear extension.
-
2026/3405/P Granted
Flat A and Flat B 23 Ravenshaw Street London NW6 1NP
Amalgamation of Flat 23A and Flat 23B to form one dwellinghouse (Use Class C3), including, insofar as required, the change of use of Flat 23B from a small house in multiple occupation (Use Class C4) to a dwellinghouse (Use Class C3), together with removal of an internal blockwork partition wall.
-
2026/3591/P Awaiting decision
22 Ulysses Road London NW6 1EE
Erection of an outbuilding within rear garden.
-
2026/3566/P Awaiting decision
41 & 43 King Henry's Road London NW3 3QR
Subdivision and use of the buildings as two separate residential dwellings.
-
2026/3527/P Awaiting decision
303 Flat Ground Floor Rear Studio West End Lane London Camden NW6 1RD
Use of ground floor studio flat as single dwelling unit (Class C3)