Planning application
2025/2386/L
15 Chalcot Square London NW1 8YA
Proposal
Internal and external alterations including reconfiguration of internal spaces; restoration works across all floors; replacement of rear terrace, balustrade and external staircase; installation of acoustic enclosure for air source heat pump in rear garden; replacement of windows and rooflights; roof repairs; and installation of underfloor heating.
As published by the council, reference 2025/2386/L
Timeline
Dates from the published record
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2 Sep 2025
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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2026/2298/L Awaiting decision
15 Chalcot Square London NW1 8YA
Approval of Details for part condition 4(E) (Slates and ridge tiles) of Listed Building Consent; 2025/2386/L "Internal and external alterations including reconfiguration of internal spaces; restoration works across all floors; replacement of rear terrace, balustrade and external staircase; installation of acoustic enclosure for air source heat pump in rear garden; replacement of windows and rooflights; roof repairs; and installation of underfloor heating ", granted on 02/09/2025
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2026/2298/P Awaiting decision
15 Chalcot Square London NW1 8YA
Approval of Details (Condition 4E) of Listed Building Consent; 2025/2386/L "Internal and external alterations including reconfiguration of internal spaces; restoration works across all floors; replacement of rear terrace, balustrade and external staircase; installation of acoustic enclosure for air source heat pump in rear garden; replacement of windows and rooflights; roof repairs; and installation of underfloor heating ", granted on 02/09/2025
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25-00150-HAPP Granted
15 Chalcot Square London NW1 8YA
Replacement of the rear terrace, railings, external staircase, and internal alterations; the replacement of existing windows and doors throughout; replacement of existing rooflights to the rear roof; and an acoustic enclosure in the rear garden to house an air source heat pump (ASHP).
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2025/2372/L Awaiting decision
15 Chalcot Square London Camden NW1 8YA
Single storey rear extension and associated internal
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2017/4550/T Granted
15 Chalcot Square London NW1 8YA
(TPO REF C67-T5) REAR GARDEN: 1 x Lime - Reduce crown by 30%, by approximately 3m over the crown, cut back limb extending ove rear gardens so it is within the crown of the tree and remove any dead or broken limbs
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2026/2034/L Awaiting decision
15 Chalcot Square London NW1 8YA
Details pursuant to part-discharge Condition 4 of Listed Building Consent 2025/2372/L, granted 29.09.2025, for a "Single storey rear extension and associated internal alterations. Enlargement of upper ground floor terrace." Namely to discharge Condition 4 a) Details including elevations and sections at 1:10 of all new joinery including internal and external doors; and, b) Elevation and section drawings at 1:10 of the new terrace railings and external staircase.
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).