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Planning application

88 Onslow Gardens, London

Awaiting decision Kensington and Chelsea LB/26/03993 Listed Building Consent

Works: Loft or dormer

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

Proposal

Proposed works to the main mansard roof including replacement slates with Penrhyn Heather Blue Welsh slate; new battens to match existing; new breather membrane; new mortar bedded ridges to match existing. Conservation rooflight within structural opening to replace rooflight. Renewed lead weathering to access hatch. Associated lead detailing, to include flashings, soakers, central valley gutter, parapet gutters, dormer cheeks, and ancillary weathering details to be renewed, like-for-like. New conservation rooflight within structural opening to replace rooflight.

As published by the council, reference LB/26/03993

Application record

Reference
LB/26/03993
Type
Listed Building Consent
Status
Validated and Registered
Received
21 Jul 2026
Ward
Courtfield
Parish
06

Timeline

Dates from the published record

  1. 21 Jul 2026

    Received by Kensington and Chelsea

  2. 1 Aug 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.

    Kensington and Chelsea took a median of 84 days over the applications it decided in the last year.

Documents

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

18 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 happens while it is decided

This application is with Kensington and Chelsea for determination, against a statutory target of eight weeks. Over the last year Kensington and Chelsea decided heritage and listed building applications in a median of 120 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.

In Kensington and Chelsea

  • LB/26/03098 Granted

    14 Holland Street, London, W8 4LT

    Removal on non-original furniture, fixtures and fittings. Installation of new coffee shop to include new floor finish over existing screed floor (floor boards retained), new light fittings, new coffee counter, plumbing and services. Limited refurbishment to shop front such as painting and new sign in place of existing.

    10 Jun 2026 Heritage and listed buildings
  • LB/26/02918 Granted

    220 and 222 Earl's Court Road, London, SW5 9QA

    Proposed installation of roof top plant and internal alterations

    2 Jun 2026 Heritage and listed buildings
  • LB/26/02796 Granted

    Flat 8, 89 Onslow Square, London, SW7 3LT

    Strip out entire property for a full refurbishment to include blocking up one entrance into the sitting room, supply and fit new kitchen and appliances, plumb in 2x new bathrooms, supply and fit new radiators where necessary, re-decorate entire property; supply and lay wooden floor in hallway with acoustic insulation.

    26 May 2026 Heritage and listed buildings
  • LB/26/02366 Withdrawn

    10 Palace Gate, London, W8 5NF

    Replacement of exsiting defective internal rainwater downpipe.(Retrospective Application)

    27 Apr 2026 Heritage and listed buildings
  • LB/26/02248 Withdrawn

    41 Halsey Street, London, SW3 2PT

    Refinements to lower ground floor conservatory and basement extension through removal of low external wall, installation of full height sliding doors, and reinstatement of larger external steps. Replace glazed flat roof at ground floor level with glass-box extension incorporating solid floor structure and internal walk on rooflight. Installation of glazed sliding doors out to a Juliet balcony with metal railings balustrade. Create access from living room by lowering sill of window to form archway; Single-storey extension to closet wing, aligning depth with No.?40 Halsey Street. New timber-framed glazed doors to the rear of extended wing. Widening opening to half-level study within partition to accommodate new double doors. Sunroom will include full-height sliding doors and Juliet balcony with painted or PPC metal balustrades.

    20 Apr 2026 Heritage and listed buildings