Planning application
2023/1926/L
4 Holly Mount London Camden NW3 6SG
Proposal
Creation of en-suite bathroom within existing modern roof extension.
As published by the council, reference 2023/1926/L
Timeline
Dates from the published record
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19 Jun 2023
Decision issued: Granted
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22 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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2026/2942/L Awaiting decision
3 Holly Mount London Camden NW3 6SG
Erection of mansard roof extension, raising of chimneys, opening of second-floor rear window, as well as internal works including removing of partition walls and expansion staircase
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2026/2623/P Awaiting decision
3 Holly Mount London Camden NW3 6SG
Erection of mansard roof extension, raising of chimneys, opening of second-floor rear window, as well as various internal works
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2025/2158/L Awaiting decision
3 Holly Mount London NW3 6SG
Proposed internal alterations to the Ground floor and Lower ground floor. External alterations include; enclosure of the rear areaway, widening of openings at Ground floor, construction of parapet wall to the rear closet wing, reinstate window arch at 1st floor, installation of rooflight to the rear bathroom.
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2025/2123/P Awaiting decision
3 Holly Mount London Camden NW3 6SG
Proposed internal alterations to the Ground floor and Lower ground floor. External alterations include; enclosure of the rear areaway, widening of openings at Ground floor, construction of parapet wall to the rear closet wing, reinstate window arch at 1st floor, installation of rooflight to the rear bathroom.
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2013/7576/L Granted
8 Holly Mount London NW3 6SG
Alterations including replacement of modern casement windows at basement, 1st, 2nd and 3rd floor levels with new timber framed casement windows, removal of modern bay and porch at ground level and reinstatement of sash window, plus internal alterations including the reinstatement of timber panelling.
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2013/7540/P Granted
8 Holly Mount London NW3 6SG
Alterations including replacement of modern casement windows at basement, 1st, 2nd and 3rd floor levels with new timber framed casement windows, removal of modern bay and porch at ground level and reinstatement of sash window.
Other heritage and listed buildings applications
In Camden
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2026/3248/L Awaiting decision
15 Eton Villas London NW3 4SG
Single storey rear extension, internal reconfigurations, installation of double-glazed windows and doors, new air-conditioning units, landscaping to rear garden and erection of outbuilding amongst other alterations to the property.
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2026/3213/L Awaiting decision
51, 53, 55, 57 Lamb's Conduit Street London Camden WC1N 3NB
Installation of gas infrastructure including an external gas riser, associated pipework, and internal alterations comprising the relocation of gas meters and associated connections
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2026/2318/L Granted
90 Frognal London NW3 6XB
Structural strengthening of underground vault and underpinning of northern side of ground-floor boot room.
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2026/2136/L Granted
45 Downshire Hill London NW3 1NU
Proposed repair and replacement of front elevation windows with matching single glazed timber sash units. Replacement modern French doors in slim-profile double glazing. Rear windows retained, and repaired as required.
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2026/2122/L Granted
6 Royal College Street London NW1 0TH
Various internal and external changes, including replacement and alteration to timber windows, adjustments to internal layout, installation of fire-rated doors and emergency lighting, relocation and rearrangement of bathroom and kitchen (retrospective).