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16, John Islip Street, SW1P 4JU

26/07648/LBCAll OtherAwaiting decision
Site boundary (council red line)

Proposal

Replacement of dormer window comprising two side-hung and two top-hung casements with a single-glazed timber casement window with hardwood cill to match the existing in size, profile, operation, fenestration and ironmongery, together with replacement Code 6 sheet lead apron flashing.

Submitted
10 November 2026
  1. Received10 Nov
  2. Validated
  3. Consult.
  4. Target
  5. Decided

About this application

This is a planning application for a dormer extension at 16, John Islip Street, SW1P 4JU. Westminster has handled 1,834 applications of this type. It has been with the council since 10 November 2026 and is still awaiting a decision. The site is in the Millbank conservation area, with 9 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 36 applications across VSW_22. We hold 1,248 applications in total for the SW1P postcode area.

92% of all other applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode
SW1P 4JU
Application type
All Other

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Also checked, none recorded (21)

flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Source: Westminster

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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For applicants and trades

Before the decision

You may need a flood risk assessment. Drainage & flood risk consultants near this site

The site is in flood zone 3 (Environment Agency).

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