Proposal
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).
As published by the council, reference 25-00150-HAPP
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 householder applications
How this application type works
Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.
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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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.
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2025/2225/P Awaiting decision
15 Chalcot Square London NW1 8YA
Single storey rear extension at lower ground floor
Other householder applications
In Camden
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2026/3241/P Awaiting decision
15 Eton Villas London NW3 4SG
Single storey rear extension, 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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2026/1084/P Granted
13 Hampstead Hill Gardens London NW3 2PH
Erection of a single storey lower ground floor rear extension following demolition of existing orangery, part enclosure of the existing inset terraces and installation of enlarged rooflight at rear roof level, new window at rear first floor level, replacement roof and installation of rooflight to convert existing garage into habitable space with cycle storage, and replacement windows and doors to all external elevations.
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2026/3200/P Awaiting decision
22 Redington Road London NW3 7RG
Retrospective application for the erection of replacement bin store.
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2026/3150/P Awaiting decision
16 Alvanley Gardens London NW6 1JD
Erection of side and rear extensions at ground and first-floor levels; alterations to the roof including the installation of four rooflights, eight solar panels and four dormer windows to the side and rear roof slopes; installation of external solar shading; replacement of existing single-glazed windows with triple-glazed windows; and installation of external wall insulation to the side and rear elevations to improve the building's energy efficiency.
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2026/3145/P Awaiting decision
3 Christchurch Hill London NW3 1JY
Excavation of the existing front vaults to provide additional amenity floorspace, enlargement of the existing front and rear roof dormers, alterations to the front boundary treatment and associated landscaping, alterations to the rear hard landscaping, including the creation of a new garden with level access; infilling of the first-floor rear balcony to create a new study; installation of a rain garden on the roof of the existing first-floor rear outshot; replacement of existing timber windows and lead roofing; and relocation of the existing rooflight at third-floor level.