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Planning application

17 Chapel Street London SW1X 7BY

Awaiting decision Westminster 26/04885/LBC Heritage and listed buildings

Works: Extension

Relates to 26/04162/NMA

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over and associated internal alterations (Linked with 26/04162/NMA)

As published by the council, reference 26/04885/LBC

Application record

Reference
26/04885/LBC
Category
Heritage and listed buildings
Status
Pending
Received
21 Jul 2026
Validated
21 Jul 2026
Postcode
SW1X 7BY

Site history

Applications at this address on the Westminster register

This site has had 9 applications since 2025: 0 approved, 1 refused.

  • 26/04162/NMA Awaiting decision

    17 Chapel Street London SW1X 7BY

    Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)

    Submitted 23 Jun 2026 Amendments
  • 26/03892/LBC Awaiting decision

    17 Chapel Street London SW1X 7BY

    Erection of timber glazed orangery extension to existing first floor rear terrace and associated internal alterations. (Linked with 26/03891/FULL)

    Submitted 15 Jun 2026 Heritage and listed buildings
  • 26/03891/FULL Awaiting decision

    17 Chapel Street London SW1X 7BY

    Erection of timber glazed orangery extension to existing first floor rear terrace. (Linked with 26/03892/LBC)

    Submitted 15 Jun 2026 Full applications
  • 26/03816/ADFULL Decided

    17 Chapel Street London SW1X 7BY

    Details of Arboricultural method statement pursuant to condition 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).

    Submitted 10 Jun 2026
  • 26/01389/ADFULL Awaiting decision

    17 Chapel Street London SW1X 7BY

    Details of windows and doors pursuant to Condition 4 of planning permission dated 24 July 2025 (RN: 25/01676/FULL). [Linked to 26/01476/ADLBC]

    Submitted 4 Mar 2026 Full applications
  • 26/01476/ADLBC Awaiting decision

    17 Chapel Street London SW1X 7BY

    Details of new staircase to fourth floor pursuant to Condition 3 of listed building consent dated 24 July 2025 (RN: 25/01677/LBC). [Linked to 26/01389/ADFULL]

    Submitted 4 Mar 2026 Conditions
  • 26/01057/ADFULL Awaiting decision

    17 Chapel Street London SW1X 7BY

    Details of tree method statement pursuant to Condition 6 of planning permission dated 24/07/2025 (RN: 25/01676/FULL)

    Submitted 19 Feb 2026 Full applications
  • 25/07612/ADFULL Refused

    17 Chapel Street London SW1X 7BY

    Detailed drawings of a) All new external windows and doors and b) The timber screen/trellis to the roof terrace on the rear extension and a tree protection method statement pursuant to Conditions 4 and 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).

    Decided 10 Feb 2026 Full applications

Timeline

Dates from the published record

  1. 21 Jul 2026

    Received by Westminster

  2. 29 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 15 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Westminster took a median of 66 days over the applications it decided in the last year.

Cases linked to this one on the register

  • 26/04162/NMA Awaiting decision

    17 Chapel Street London SW1X 7BY

    Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)

    Submitted 23 Jun 2026 Amendments

1 later application on the register refers to this one:

  • 26/04162/NMA Awaiting decision

    17 Chapel Street London SW1X 7BY

    Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)

    Submitted 23 Jun 2026 Amendments

What happens while it is decided

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 94 days. More in our guide to how long planning decisions take.

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 0.3 miles

  • 17 Chapel Street London SW1X 7BY

    26/03816/ADFULL Submitted 10 Jun 2026 50 yards away

    89% historically approved · decision due ~5 Aug

    Details of Arboricultural method statement pursuant to condition 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).

    Decided

  • 10 Chapel Street London SW1X 7BY

    26/05944/ADFULL Submitted 1 Sep 2026 50 yards away

    Details of a completed Appendix A checklist from the Code of Construction Practice pursuant to Condition 3 of planning permission dated 10 July 2025 (RN: 25/01535/FULL).

    Granted

  • 10 Chapel Street London SW1X 7BY

    26/04209/ADFULL Submitted 25 Jun 2026 50 yards away

    89% historically approved · decision due ~20 Aug

    Detailed drawings of window at rear third floor level above the closet wing extension to match the windows in the rear closet wing extension in terms of size and detailed design and the two roof skylights must be conservation area styled rooflights, reduced in size, centrally positioned and closer to the roof ridge; detailed drawings of the new windows within the closet wing extension pursuant to Conditions 6 (parts a and b) and 7 of planning permission dated 10 July 2025 (RN:25/01535/FULL).

    Decided Extension Loft or dormer +1

  • 17 Chapel Street London SW1X 7BY

    26/01389/ADFULL Submitted 4 Mar 2026 50 yards away

    87% historically approved · decision due ~29 Apr

    Details of windows and doors pursuant to Condition 4 of planning permission dated 24 July 2025 (RN: 25/01676/FULL). [Linked to 26/01476/ADLBC]

    Awaiting decision Full applications Windows or glazing 10 docs

  • 17 Chapel Street London SW1X 7BY

    26/01476/ADLBC Submitted 4 Mar 2026 50 yards away

    90% historically approved · decision due ~29 Apr

    Details of new staircase to fourth floor pursuant to Condition 3 of listed building consent dated 24 July 2025 (RN: 25/01677/LBC). [Linked to 26/01389/ADFULL]

    Awaiting decision Conditions 10 docs

  • 22 Chapel Street London SW1X 7BY

    26/02319/LBC Submitted 8 Apr 2026 50 yards away

    90% historically approved · decision due ~3 Jun

    Proposed defect remedial and waterproofing works to:- railings & stone kerb upstand, entrance portico; balcony balustrade and stucco work to elevation and columns at:- lower ground; ground and first storey levels. (Linked to 26/02318/FULL)

    Awaiting decision Heritage and listed buildings 16 docs

In Westminster

  • 26/04878/LBC Decided

    34 Grosvenor Street London W1K 4QU

    Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

    Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
  • 26/04141/LBC Decided

    80E Randolph Avenue London W9 1BG

    Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

    Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings
  • 26/06288/LBC Awaiting decision

    Barness Court 6 - 8 Westbourne Terrace London W2 3UW

    Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06287/FULL)

    Received 14 Sep, published by the council 21 Sep 2026 Heritage and listed buildings
  • 26/06270/LBC Awaiting decision

    Maisonette Basement And Ground Floor 101 Hereford Road London W2 5BB

    Amalgamation of existing lower ground and ground floor maisonette with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06269/FULL)

    Received 14 Sep, published by the council 21 Sep 2026 Heritage and listed buildings
  • 26/06230/LBC Awaiting decision

    10 Bedford Street London WC2E 9HE

    Internal redecoration/refurbishment to the existing Caffe Nero including redecorating throughout, replacing the tiled floor in the customer area, raising the timber floor by 180mm on the left-hand side upon entry to bring interest to the area, for the existing large, boxed window cils on right-hand side upon entry; the one on the far right will be removed to give way for more seating, with the other being adapted to allow for leg space below, and two bespoke decorative chandeliers to be hung in the customer area which will be installed with structural engineer approval.

    Received 11 Sep, published by the council 21 Sep 2026 Heritage and listed buildings