Planning application
2025/4472/L
Flat A 21 Mornington Crescent London NW1 7RG
Proposal
Conversion of maisonette into two self contained flats at ground and lower ground with internal alterations, replacement of window with door and infill at lower ground floor and cycle storage to rear
As published by the council, reference 2025/4472/L
Timeline
Dates from the published record
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19 Sep 2025
Received by Camden
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7 Oct 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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2024/1729/P Withdrawn
21 Mornington Crescent London Camden NW1 7RG
Erection of outbuilding to the rear of garden for use as a studio office with associated landscaping.
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2025/4167/P Awaiting decision
Flat A 21 Mornington Crescent London NW1 7RG
Conversion of maisonette into two self contained flats at ground and lower ground, replacement of window with door and infill at lower ground floor and cycle storage to rear
-
2025/0938/L Withdrawn
Flat A, 21 Mornington Crescent Camden London NW1 7RG
Conversion of existing maisonette to two self-contained flats, excavation of existing front cellar vaults to accommodate bathroom and utility room and infill of front lightwell under entrance footbridge
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2021/2654/P Withdrawn
21 Mornington Crescent London NW1 7RG
Two storey rear extension at lower and ground floor level and associated works and the reconfiguration of the internal layout.
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2022/0055/L Withdrawn
21 Mornington Crescent London NW1 7RG
Construction of an outbuilding to the rear of garden for the use as a studio office including associated landscaping. See planning permission application 2021/5608/P for associated plans and documents
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2023/0439/P Granted
21 Mornington Crescent London NW1 7RG
Construction of a rear extension at ground level and lower ground floor level.
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).