Planning application
2025/5791/L
23 Oakhill Avenue London NW3 7RD
Proposal
Demolition of the existing conservatory and ground-floor extensions associated with excavation works at lower ground floor level for a new two storey extension; installation of external staircase enclosure all to the rear lower and ground floor levels including installation of glazed balustrade for a new terrace area at ground floor level all to the rear elevation; internal alterations across all existing floors, including the creation of a new loft conversion with rooflights and a new staircase; installation of rooflights to the rear roofslope, refurbish and redecorate the existing historic windows, repointing of the brickwork, reinstate of the fireplaces in the principal rooms; fenestration alterations to the rear and flank elevation.
As published by the council, reference 2025/5791/L
Timeline
Dates from the published record
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17 Dec 2025
Received by Camden
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22 Dec 2025
Validated
Checked as complete and ready for consideration.
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24 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Camden for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
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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2025/5717/P Awaiting decision
23 Oakhill Avenue London NW3 7RD
Demolition of the existing conservatory and ground-floor extensions associated with excavation works at lower ground floor level for a new two storey extension; installation of external staircase enclosure all to the rear lower and ground floor levels, including alteration to the fenestration treatment to the rear and side elevations, installations of rooflight to the main roofslope, installation of glazed balustrade for a new terrace area at ground floor level all to the rear elevation.
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2024/5242/T Granted
21 Oakhill Avenue London NW3 7RD
FRONT GARDEN: 1 x Holly (Ilex aquifolium) (T5) - Reduce in height approx. 2m - 2.5m to the height of the window seal of the first floor. - Trim remaining crown to shape and contain.
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2011/0227/P Granted
25 Oakhill Avenue London NW3 7RD
Conversion of ground and first/second floor maisonette to single-family dwelling house (Class C3).
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2011/0230/L Granted
25 Oakhill Avenue London NW3 7RD
Internal alterations in connection with conversion of ground and first/second floor maisonette to single-family dwellinghouse (Class C3).
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2022/4672/P Granted
25 Oakhill Avenue London NW3 7RD
Amalgamation of two self-contained flats into single dwelling, basement excavation and demolition of existing rear extension to provide a new two-storey extension over lower ground and ground floor levels, and associated internal alterations.
-
2023/3089/L Granted
25 Oakhill Avenue London NW3 7RD
Replacement of single-glazed windows with slimline double-glazed timber framed units at rear and side elevations to match existing window joinery, and installation of histoglass secondary glazing on remaining side and rear windows.
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.
-
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
-
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).