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Planning application

15 Chalcot Square London NW1 8YA

Granted Camden 2026/2034/L Approval of Details (Listed Building)

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

Relates to 2025/2372/L

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Details pursuant to Condition 4(a) (joinery) and 4(b) (terrace railings and external staircase) of Listed Building Consent 2025/2372/L, dated 29/09/2025, for the "Single storey rear extension and associated internal alterations. Enlargement of upper ground floor terrace."

As published by the council, reference 2026/2034/L

Application record

Reference
2026/2034/L
Type
Approval of Details (Listed Building)
Status
Final Decision
Decision
Granted
Received
19 May 2026
Validated
21 May 2026
Decided
4 Sep 2026
Ward
Primrose Hill
Decision by
Delegated
Postcode
NW1 8YA

Site history

Applications at this address on the Camden register

This site has had 16 applications since 2016: 10 approved, 0 refused.

  • 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

    Submitted 5 Jun 2026 Heritage and listed buildings
  • 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

    Submitted 5 Jun 2026 Reserved matters
  • 2026/2111/L Awaiting decision

    15 Chalcot Square London NW1 8YA

    Approval of Details Pursuant to Condition 4 (Detailed Drawings and Materials) of Listed Building Consent Ref: 2025/2386/L dated 02/09/2025. "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."

    Submitted 22 May 2026 Heritage and listed buildings
  • 2026/2111/P Awaiting decision

    15 Chalcot Square London NW1 8YA

    Approval of Details Pursuant to Condition 4 (Detailed Drawings and Materials) of Listed Building Consent Ref: 2025/2386/L dated 02/09/2025. "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."

    Submitted 22 May 2026 Full applications
  • 2026/2033/P Granted

    15 Chalcot Square London NW1 8YA

    Details pursuant to Condition 4 (Tree protection details) of planning permission 2025/2225/P granted on 25/09/2025 "Single storey rear extension at lower ground floor and enlargement of upper ground floor terrace"

    Decided 23 Jul 2026 Full applications
  • 2026/2034/P 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.

    Submitted 19 May 2026 Full applications
  • 2026/0554/P Granted

    15 Chalcot Square London NW1 8YA

    Details of Condition 8 (Materials of ASHP enclosure) of planning permission 2025/2117/P, granted on 02/09/2025 for: 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).

    Decided 11 Feb 2026 Full applications
  • 2025/5156/P Granted

    15 Chalcot Square London NW1 8YA

    Details of condition 4 (Tree Protection Plan) of planning permission 2025/2225/P dated 25/09/2025 for 'Single storey rear extension at lower ground floor and enlargement of upper ground floor terrace'

    Decided 13 Jan 2026 Full applications
  • 2025/5106/P Granted

    15 Chalcot Square London NW1 8YA

    Details of Conditions 6 (ASHP Living Roof) and 8(a) (Materials of ASHP enclosure) of planning permission 2025/2117/P, granted on 02/09/2025 for: 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).

    Decided 22 Jan 2026 Full applications
  • 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).

    Decided 2 Sep 2025 Householder

Timeline

Dates from the published record

  1. 19 May 2026

    Received by Camden

  2. 21 May 2026

    Validated

    Checked as complete and ready for consideration.

  3. 24 Jul 2026

    Added to PlanIndex

  4. 4 Sep 2026

    Decision issued: Granted

Cases linked to this one on the register

  • 2025/2372/L Awaiting decision

    15 Chalcot Square London Camden NW1 8YA

    Single storey rear extension and associated internal

    Heritage and listed buildings

Documents

Plans, drawings, consultee responses and the officer's report

7 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

What this grant of permission means

Camden granted permission on 4 September 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About heritage and listed building applications

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 15 Chalcot Square London NW1 8YA

    2026/2298/L Submitted 5 Jun 2026 0m away

    96% historically approved · decision due ~6 Aug

    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

    Awaiting decision Heritage and listed buildings Loft or dormer Windows or glazing 9 docs

  • 15 Chalcot Square London NW1 8YA

    2026/2298/P Submitted 5 Jun 2026 0m away

    94% historically approved · decision due ~6 Aug

    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

    Awaiting decision Reserved matters Loft or dormer Windows or glazing 9 docs

  • 15 Chalcot Square London NW1 8YA

    25-00150-HAPP 0m away

    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).

    Granted Householder Loft or dormer Windows or glazing
    Domestic

  • 15 Chalcot Square London Camden NW1 8YA

    2025/2372/L 0m away

    96% historically approved

    Single storey rear extension and associated internal

    Awaiting decision Heritage and listed buildings Extension
    Small domestic

  • 15 Chalcot Square London NW1 8YA

    2017/4550/T 0m away

    (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

    Granted Trees

  • 15 Chalcot Square London NW1 8YA

    2025/5106/P Submitted 11 Nov 2025 0m away

    Details of Conditions 6 (ASHP Living Roof) and 8(a) (Materials of ASHP enclosure) of planning permission 2025/2117/P, granted on 02/09/2025 for: 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).

    Granted Full applications Loft or dormer Windows or glazing 6 docs

In Camden

  • 2026/3332/L Granted

    82 Hampstead High Street London Camden NW3 1RE

    Replacement chimney pots & chimney repairs.

    5 Aug 2026 Heritage and listed buildings
  • 2026/3162/L Granted

    48 Monmouth Street London WC2H 9EP

    Repainting works to shopfront and projecting sign bracket and display of 1 x non-illuminated fascia sign and 1 x non-illuminated replacement projecting sign.

    27 Jul 2026 Heritage and listed buildings
  • 2026/3964/L Awaiting decision

    3 Gainsborough Gardens London NW3 1BJ

    Reorganisation of the front garden

    14 Sep 2026 Heritage and listed buildings
  • 2026/3052/L Refused

    128 St Pancras Way London NW1 9NB

    Erection of rear extension and internal alterations.

    17 Jul 2026 Heritage and listed buildings
  • 2026/3142/L Granted

    The British Museum Great Russell Street London WC1B 3DG

    Installation of metal gate in place of approved replacement brick wall on northern boundary between nos. 11 Montague Street & 43 Russell Square.

    24 Jul 2026 Heritage and listed buildings